Bike fork offset calculator. Bicycle stack and reach calculator with .

Bike fork offset calculator Bicycle Trail Jun 28, 2017 · Search for fork rake calculator online and enter the desired values, you will see the resulting trail. 6 degrees Trail 104. The fork offset, on the other hand, is the distance between the front axle and the steering axis. Read this get the highlights and to find out how it performs on the trail. Flight CR1 - Flight Bikes I think it's right? Jan 27, 2009 · In bike CAD, the fork length is defined along the steering tube centerline, but it can display a dimension that is defined either way, depending on what you select. Wheel Size: With a larger wheel, the axle is higher off the ground than a smaller wheel Feb 19, 2007 · Cyclocross bikes typically have 72 - 72. At the moment I have two options, either a Columbus Minimal with a 45mm offset, or an Ouzo Pro with a 40mm offset. Imagine a line passing through the steerer tube of the fork. With the fork riding on linkage bearings instead of sliding bushings, it would hypothetically be smoother, stiffer, and more reliable. Sep 6, 2017 · my Ohlins forks arrived, only had time for a quick look before a business trip, the stem is larger diameter as expected, for 35mm ID bearings it seems the standard offset is 36mm, i compared the fork length against the sprint and very aproximately (with string!) the ohlins are the same length as the sprint forks sit in the bike. Triple Clamp Offset: inches : Distance from center of top of steering neck to centerline of top of fork tubes. Nov 18, 2008 · 36mm Forks Float, Talas, Van 160: 545. If you liked the bike with the 45 mm fork, it will be a little more stable but still very responsive with the 43 mm fork. If you use a very fat rear tire, you should keep the trail as close to 4 inches as possible. Steepening the head angle will bring the wheel closer to the rider 1. The spoke length project. Comparing multiple hardtails but one of them is shown with a static chart and the other with a sagged chart? Use the Sagged Hardtail Calculator to change the static to sagged or sagged to static and then plug the outputs into the Bike Geometry Calculator to compare against other bikes. In general, bikes designed for off-road use have high trail figures whereas bikes designed for pavement have low to mid trail figures. 5mm BB Height 340. The fork offset plays a significant role in determining the handling characteristics of a bike. Posted by u/madscientistmtb - 33 votes and 11 comments Aug 11, 2024 · I have a bike, original design was 551mm A2C and 51mm fork offset. Dec 26, 2021 · The high-trail bike has more wheel flop/power steering so it’s easier to turn the handlebars quickly. Second, fork offset has been on the radar since the early 90s before suspension was a big deal. TOO MUCH TRAIL If the trail is more than 6 inches the bike will handle sluggishly at high speeds. This messes up the weight balance. com : RockShox 35 Gold RL Suspension Fork - 29", 160 mm, 15 x 110 mm, 44 mm Offset, Black, E-MTB, A2 : Sports & Outdoors fork height: mm ": mm ": mm " Compatible with E-bikes ; Specifications: Wheel Size: 29" Offset: 44mm Offset Steerer: Tapered (1-1/8"-1-1/2") Axle: 15 x 110mm Stanchion Diameter: 35mm Brake Type: 180mm Post Mount Color: Black Weight: 2339g This product was added to our catalog on March 23, 2021 Jun 21, 2012 · This calculator is from the same site that I use for stem length measurements. Unless the bike has a negative trail condition increasing the fork offset will decrease trail while decreasing offset will increase One has a fork built with 42mm of offset (sometimes referred to as rake, although they are not technically the same thing) and one has a fork with 61mm of offset. 036 mm - 0. The common offset for a 650B fork is 44mm and the trail on a 650B bike using that fork will be nearly the same as This tool allows you to calculate the actual trail of a bike, given the wheel size, the fork's offset, and the head tube angle. Fork Rake (Offset) Fork rake is the offset of the fork dropout from the straight line of the steering axis (centreline of the fork’s steerer tube). From twisting throttles to spinning pedals, we love all things on wheels. Calculate a full chart from the often sparse geometry chart provided by the manufacturer. If changing from a rigid fork to a suspension fork, try out the Sagged Hardtail Geometry Calculator with the rigid bike as the current bike (left column) and experiment with suspension fork options to approximately match the sagged geometry (right column) with the current rigid geometry. Aug 24, 2024 · Formula of Bicycle Frame Angle Calculator. Those three things are: head angle, fork offset, and wheel radius as measured to the ground. Feels much more direct than my previous 50 length/44 offset or 50 length/38 offset setups. For my gen. Mar 31, 2020 · To assist new riders understand the concept better, let us imagine a bike with a huge rake and long fork. Nov 28, 2024 · Chainstays in mm *. Triple Tree Rake: degrees May 19, 2021 · Let’s say you were a bit particular about the changes you make to your bike. For many models RT manufactures complete replacement Custom G3-S Shocks and G6 Forks that utilize Gold Valve technology. 5* HA and 86-91mm of fork trail, then a new bike w/ 3* slacker HA and increased fork trail is gonna feel considerably different, regardless of whether your fork has 46mm offset (providing 114mm trail) or 51mm offset (providing 108mm trail). May 21, 2013 · What is a fork-offset? Please don't take my word for it, check it in one of the web bicycle geometry calculators. Enhance your cycling experience with RockShox Fork Judy Silver TK Solo Air 29 QR. Use "bicycle trail calculator" in a search engine. head angle. I put in the 368mm length (parallel to the steering tube) advertised for a LOOK fork and the length from axle to crown is 371mm. What does thismean and is it a good upgrade for other bikes? When bike manufacturers tweak the fork offset they’re modifying the trail of thebike. I decide to install a taller fork now the HA becomes slacker - 1 degree for every 1" of change . Sep 24, 2019 · The bike and equipment needs for each of these cases vary drastically. Flowing smoothly through curves without swaying or wobbling. 5º. Motorcycle Trail. In other words, how far the axle sits in front of the imaginary head tube line. Sep 11, 2018 · For the two prior years I rode a Following with an 130mm 51mm fork. Dec 28, 2017 · As we know, changing the fork length will change bike geometry a bit. 5” bikes traditionally use 44-46mm offset forks). 5” wheels, a 62° headtube angle, and a 52mm-offset fork – totally realistic numbers for a downhill bike with a Fox 40 fork – has almost exactly the same mechanical trail value as a 29er with a 65° headtube angle and a 44mm-offset fork, or a 27. If you are building up a bike, it is always a good idea to reference what fork offset the frame Fork offset is the measured distance from the steering axis to the mounting point of the front wheel. How does replacing the fork designed for the bike with: A fork with smaller offset, everything else the same; A fork with bigger offset, everything else the same; Affect the handling of the bike, specifically for downhill and enduro mountain biking. 0 Fat Tire Electric Bike Fork, Double Crown This bike is endowed with terrific stability thanks to the slack head angle and 44mm fork offset. It has virtually zero effect on head tube angle. This bike would feel good on everything from rock hopping to high speed berms. If I go to a fork that is 551-552mm (Pike or Sweep), should I go with the Pike's 42mm offset or xFusion's offset offset of 46mm? Oct 29, 2021 · Offset data usually, but not always, ends with the letters “ET” (which means the same thing as offset); a 45 mm offset will be printed as either ET45 or 45ET. This is the amount of steerer tube from the top of the fork crown. com; Art Delano's Graphical Gear Chart Calc; Edd, a spiffy spoke calculator Reduced offset forks - a hot topic in the ever-changing world of mountain bikes this past year. Fork offset is the distance measured between the steering neck centerline axis and the axis of the fork tubes as shown in Figure 2. Sep 3, 2024 · Fork offset, also known as rake, is the amount in which the fork is offset from the steering axis. Fork length mm Fork offset (rake) mm Angleset angle ° Make head angle FLH series have a negative offset ( Enter -2. Rake or fork offset on its own does not influence the steering speed. For this reason, Bike Insights calculates trail for every bike, provided we have the required inputs: Head Tube Angle, Fork Offset, and Wheel Diameter or Rim BSD and Tire Width. They said that the effect was subtle, and the professional reviewers found it hard to distinguish between the two. 66d and 40mm), defining the bike more by WB and travel rather than HA. Wheel Size: With a larger wheel, the axle is higher off the ground than a smaller wheel Feb 7, 2016 · I guess if you are used to a bike w/ a 69. 6–2. 2 43mm rake gives trail of 63. In essence, the offset determines how far the front axle is “offset” from the steerer tube. But should they? There are some bike brands don’t follow the 51mm-is-best tenet. Bicycle stack and reach calculator with The bike manufacturer should be contacted, if exact values are needed. Fork Rake (offset) and Trail. Calculate your bike's RAD. In the case of a 29 Apr 14, 2022 · I think 20mm longer fork (axle to crown race seat) will slacken the head angle about 1 degree for a bike of "average" wheelbase. FYI, the G2 forks offset is 51mm and standard offset range from 44mm (Marz), 46mm (RS/Fox), 48mm (Manitou), 51mm (Fox 34). First, Like the author stated the bike will just handle a bit differently and after a short chance to get used to the difference it becomes second nature. The calculator yields ~87mm. Shorter offset actually slackens the head angle. Feb 13, 2024 · 69. The bike will handle easily at both high and low speeds. Feb 6, 2017 · Specialized Stumpjumper 29er Large – +10mm Fork, +5mm Offset Wheelbase 1187. Not all mountain bikes will benefit from a shorter offset fork and the industry is generally applying those few millimetres to appropriate models. I tried the same fork with a zero stack headset lower on my gen. Note: The smaller the fork offset (the straighter the fork) the longer the trail - contrary to a wide-spread conviction. Sep 15, 2015 · The fork is constructed from unidirectional carbon fiber for reliable strength at a low weight, and features a tapered head tube and thru-axle outputs for responsive, confident steering. Sep 18, 2019 · This is why the 44mm offset fork is most applicable to the longest, slackest bikes as the benefits outweigh the downsides. 5' head angles, which result in fairly stable steering when paired with a 43-45mm raked fork. Some people are concerned that the new, longer (or less commonly, shorter) fork lengths might adversely affect handling by changing the bike's steering geometry. • 36mm stanchions • Enhanced lower leg stiffness with "M" arch design for maximum tire clearance • FIT GRIP damper with adjustable compression and rebound • FLOAT EVOL air spring • Travel: 160mm • Adjustment: High Speed Oct 15, 2020 · The 2021 Fox Float 36 mountain bike fork features five significant changes over previous generation models. Jun 18, 2018 · Until recently, fork offset was something many riders didn’t consider when researching a new bike, fork, or geometry. Dec 7, 2018 · Relaxed geometries are better suited for bikes used over long distances, such as touring and century rides. Currently the bike has an Easton EC90SL with a 43mm offset. Harley forks are in the 30", 32", 34" or longer range. 0 forks. Designed for trail and enduro riding, the Bomber Z1 features the FIT GRIP damper, FLOAT EVOL air spring, and 36mm chassis to maximize traction and control. We are going to calculate precisely by how much the geometry changes if a smaller 27. It will seem almost too steady. Reduced offset is less common for 27. 3mm 40mm Forks Fox 40 180: 545. It is the difference between the fork rake (or offset) and the steering axis. Also consider things like your bike's age, and how much it's worth to you. It’s a great all-around bike. 5 (122mm vs 100mm), and the wheelbase is also a whole 5cm longer too (1224mm vs 1175mm). Nov 9, 2014 · I've been using a 47mm offset rigid fork. Fork offset or rake is the dimension shown. 5" rear wheel is installed. 51mm offset forks: My experience. 1 degree change in head angle is "worth" about 10mm of fork offset, in terms of getting back to the same trail. Subtracting Dim B from Dim A will result in the fork offset or rake. 5"/29" | 203mm | 47mm Offset | Straight | 20x110mm Boost There was an online conversation a year or two about fork offset by two of the best bike reviewers in the business. This measurement is typically expressed in millimeters and varies depending on the fork model and intended use. Turning the bike to either direction will mean that the bike and the rider will take a long time and a lot of space to follow suit in that direction. I would really like the bike to be more stable during high speed decents and a little less twitchy when riding in the middle of a pack (I guess I might be twitchy, not the bike). In bicycles, fork offset is also called fork rake. Rake-- The angle in degrees of the steering neck from the vertical. The longer offset is light around the straight ahead, but as you initiate a turn and lean some angle into the bike, there's a feeling of 'dropping' into the lean. Visualizing the trail concept need a little more imagination. I have found a Rockshox replacement fork that is 130 mm travel and and 37mm offset. Currently on a 1320mm wheelbase bike. It is a factor, that when combined with wheel diameter and head angle determine the mechanical trail, which is what affects the perceived steering speed. Enter 3 of the 4 values below to calculate the 4th. net Created Date: Fork Offset ( Fork Rake ) B: Positive values: hub preceeds the steering axis (as shown in the image). Aug 19, 2012 · And fork offset is in mm, not degrees. Currently rocking the Fox settings with less HSC than they recco and the fork feels really good, just not getting to full travel (I do have one spacer installed). 3mm increase in trail. OEM fork was to blame and now with a loaner fork on my bike I felt fine at 40mph in heavily gusty conditions descending Mt Lemmon road in Tucson. Another thing which has evolved to make bikes work better on even more parts of your ride. 12 posts • Page 1 of 1. 2 frame. You'll want to remove your current fork and measure the steerer RockShox Judy Gold RL Suspension Fork - 29", 100 mm, 9 x 100 mm, 51 mm Offset, Black, Straight, A3. Decreasing the fork rake makes steering slower. jimlews Posts: 1576 Joined: 11 Jun 2015, 8:36pm How do I calculate fork offset? Going beyond head angles into the nitty-gritty of MTB geometry Calculate your bike's trail. It features a weight-saving uni-crown design, flat mount disc brakes, and a 12mm x 100mm thru-axle dropout as well as braze-ons for fenders and racks. 40mm rake. 17 below which represents a hypothetical top clamp viewed from above. 377 mm = 0. Its not intuitive, but if you think about it in extremes it makes sense. May 14, 2020 · A bike with 27. It's a hotly-debated topic among bike geeks these days -- some believe that it's a key factor which determines how a bicycle handles, especially with a front load. Complete bikes will be fitted with the setup that the designers feel bring out the best characteristics of that bike. Fork Offset What is Fork Offset? Fork Offset (sometimes referred to as Rake) is the distance from the steering axis to the center of the front axle, measured perpendicular to the steering axis. No rules of thumb and no A mountain bike geometry calculator for mullet bikes, fork changes, anglesets, etc. 48mm Trail. The trail for a 43 mm fork will be 59. For example, increasing fork travel by 10 cm will make the headangle slacker and raise the bottom bracket. What does increasing fork offset do? An increase in a fork offset means that your bike will feel much more stable when riding transitions, deep bowls and going fast. Bicycle Trail Calculator | yojimg. The 43mm offset fork would be considered high trail and the 61mm offset, low trail. This particular model fits hubs with 15x100mm axles. Steeper head angles (73') would typically require a 43mm fork, while really shallow head angles (below 72') can get away with 47-50mm forks, but you get some "wheel flop" at low speeds. ’ Bike Geometry is Complex. 100% CroMoly construction, fully brazed crownMid-blade thru-blade eyeletsRack and fender eyelets at the dropout12mm x 100mm thru-axleClearance Dec 6, 2022 · Rake (Fork Offset) and Trail. 57mm of trail is considered by many to be an ideal combination of stability and agility. The Role Road bikes 73-74 degrees CX 72-73 degrees. 3 (an increase of 2. Bikes like the Transition Sentinel (of course) spec a reduced 43mm offset. Fork Length-- The distance between the top of the fork tubes to the centerline of the axle. Modifications include changing fork travel or offset, mixing wheel sizes, installing an angleset or reach adjust headset, changing rear center length, or installing a different lower headset cup. Leitner and Lawwill saw linkage forks as a way to decouple the mechanical motion of fork compression from the performance of the shock spring itself. 5” models using reduced 37mm offset forks (27. Dec 17, 2013 · But 650B bikes aren't meant to use 39mm offset forks (designed for 26in bikes). More trail is nice at high speeds (motorcycles usually have 80 mm of trail) but can feel sluggish at slower speeds. 2. When it comes to the front end of the bike, Head Angle, Fork Offset, and Trail are the numbers to be looking at. g. I wish that they would make a 10mm offset for the big bikes. A bike’s rake or fork offset is the distance between the front wheel’s axle and a line drawn through the center of the head tube to the ground. Race Tech Engines offer state-of-the-art, precision engine services and parts to all engine builders. Aug 31, 2013 · please - find a good geometric figure and it wil be obvious. Trail is the horizontal distance between your bike's steering axis and the center of the front tire's contact patch. Measure from there to the center of the front hub, and you've Nov 10, 2018 · Image - Bike Radar - 51mm, 44mm, 37mm offset Fox fork crowns __________________ Swathes of new bike models have been released lately and one of the keyfeatures being thrown around is a reduced offset on the fork. Measure the height of the fork dropout off the top of the flat surface (Dim A). I did try running a Manitou Absolute 29er 120mm TA which resolved the toe overlap but caused the front end to flop around on the tough climbs here in CO. But if you feel that your bike is a bit wayward and unstable on a Dec 3, 2013 · 1. Designed with the Midnight Special frame, this fork is built for comfort and speed on long road rides. Likewise, a mountain bike or Feb 27, 2011 · The replacement fork I'm looking at comes only as 43mm and 49mm. Generally, choosing a custom fork offset will only apply to riders building a bike frame up or upgrading/replacing an older fork. Increasing the offset will make steering faster, conversely decreasing it will slow it down. Not only can this fork be seen on bold Enduro/Trail bikes, but it also has a cost-effective connotation to match its aggressive appearance. 4" tire. Install a ferrule on the remote end. Drawing a line through the steering axis to the ground, causing the line to intersect with the ground further in front of the wheel's contact patch. said most people could not tell the difference between forks with 43 and 45 mm of offset though indeed the 45 mm offset fork would tend to turn a little easier. 63d and 55mm), and the larger size have steeper HA and shorter fork offset (e. What length should the fork be? How much will this change the front center? Well, here we go, yo. Trails Reviews Tips Community Deals Latest Support I don't actually see the axle-to-crown measurement on the fork you have linked. I have been cobbling together reduced offset forks forever. Nov 14, 2019 · Bike is awesome, but find I'm still only getting about 160mm of total 170mm travel in the fork. Mar 9, 2007 · I have a Cube Reaction Touring One e-bike with 29" wheels and 55mm tyres. Aug 8, 2024 · No, you can’t change your fork offset, unless you get the Shadow’s Adjustable forks, which come with three spacers for three different offset lengths. Lyrik Select Charger RC Debon Air 29" Suspension Fork 180mm - 42mm Offset - Tapered - Maxle Stealth - 15x110mm Boost - Special Offer 243,69 €* SR Suntour Oct 29, 2021 · Rest the steerer tube of the fork on a V-block on a perfectly flat surface. The trail calculator should be used as a design aid to give you a good idea of how changes in your bikes geometry effect the need for additional trail. 455") Fork Length: inches: Length from to top of the fork tubes to the centerline of the axle. More rake will make the steering quicker, but is not the only determining factor. Look at Wheel Size, Axle Type, Steerer Tube Type, Travel amount, Brake Mount type, and fork offset. 1 frame, the trail calculator gives me a trail number of between 94 and 101mm (which seems quite high). I have always felt that the bike handles a little quicker than I would prefer. Of course there are other factors, like the front center, rear center, etc but tha Upgrading your suspension fork can get you some major performance improvements, it’s important to understand the right model for your bike. It's just used to tune the trail, which is essentially the offset between the tire contact patch and the steering axis. Bike geometry is not as simple as one geometry being ‘more stable’ than another. Performance stocks lightweight, strong forks in carbon fiber, steel, and aluminum. What does 24mm offset mean? A -24mm offset means that the mounting surface is located 24mm or 1 inch from the centerline toward the vehicle. 0 in). Why is it important? Fork Offset directly affects steering feel by changing Trail. Upgrade your fork for wider tire clearance, fender and rack mounts, or disc brakes in 29er, 700c, 650b, 27. 5". 17. And because the fork is angled, reducing the fork offset also raises the front end of the bike slightly. 5-degree change in head angle. Sep 20, 2021 · WTH? Of course a bike will "work" with a fork that has a non OEM offset. A typical head tube angle would be 73 degrees so you have really mixed up the information. Jul 5, 2017 · The most common offset for 29ers’ forks is 51mm (compared to 44-46mm for 27. Oct 9, 2023 · I have an e-mtb HT that has Judy 120 mm travel fork with 51 mm offset. Oct 5, 2018 · Trail is composed of three things. Typically 2. The fork offset is the perpendicular distance from the steering axis to the center of the front wheel. Many trail and enduro bikes are now designed around reduced 42-44mm offset forks. Have tried both the Yeti settings and Fox settings. I tinker too much, so have ran it with several forks, currently I have matched the A2C at 551mm, but I have a 37mm offset. 9 Boost LT Fork An AMP F1 linkage fork, up close and personal. I understand that the increase 10 mm travel will make slacken the geometry by about 1/2 degree. In your specific case, i'm guessing an almost 1cm decrease in AC will result in about ~5. 1 day ago · 1. 5-inch bikes dealt a shorter offset, but now that long-travel niners have dominated the enduro market, the reduced offset is up for interpretation. To recommend a classic touring bike — with its long and low geometry and abundant rack and fender options — to you with aspirations for supported trips or weekend rides is to deny you the pleasure of a lighter, more spirited bicycle. [7] 37mm vs 44mm fork offset Question Looking to upgrade from a Rockshox 35 Gold RL on my Trek Remedy and a good deal on a used Lyrik Ultimate has come up, but the offset is 37mm vs 44mm on my current fork. Calculate frame geometry of an existing bike through simple XY measurements. Buy your official FOX Factory suspension, apparel and accessories. Learn about bike geometry and handling to improve your riding experience with this comprehensive guide from BikeRadar. But as Peter P. And forget about wheelbase - its a 3rd order effect compated to rake and offset effect on trail. For a road bike, 72. If you're looking for a rigid fork with Boost 15x110mm spacing, check out the Whiskey No. ~69* HA, 2. They spec their 29ers with 46mm offset forks. Jul 23, 2009 · I'm admittedly a little lost when it comes to fork offset and trail and I am looking for fork advice or tricks to fix this if possible. 6mm 150mm – Axle to Crown 558mm 150mm 29er – Offset 51mm HA 66. 2mm ROCKSHOX RockShox website Axle to Crown Chart Current Model Year Unless Noted Otherwise All models +/- 5mm 28mm Forks 99-08 SID 63: 434mm 99-08 SID 80: 451mm 32mm Forks Argyle 80: 471mm Argyle 100: 491mm SID 80: 453mm SID 90: 463 SID 100: 473 Dart 80 Jul 4, 2014 · Using offset is the best choice when you need to add more maneuverability to custom bikes, but there's a fine line to walk: excessively long forks or extreme steering head angles may have the Angleset Calculator. But if the offset is too much, the bike might feel less stable, especially at higher speeds or tight turns. 67200362597166 Feb 20, 2018 · For discussions about bikes and equipment. The head angle and fork offset play a significant role in the bike’s handling. Definitions: Your front suspension geometry is defined by the following six variables which are defined as: Offset-- Centerline of top of steering neck to centerline of top of fork . Increasing the fork rake makes steering faster. Geometrical Relation between Head Tube Angle, Trail and Fork Offset; Kogswell Front-end Geometry Calculator; WISIL Trail Calculator; Anvil Frame Tube Calculator; Martindale's Calculators On-Line Center: Part I:O-Z: Sports - Cycling; Fork Geometry Calculator at Velobase. Jun 23, 2023 · Bikes with negative offset forks are often seen in disciplines like mountain biking and cyclocross, where precise handling and quick cornering are crucial. Measure the height of the center of the steerer tube off the top of the flat surface (Dim B). fork offset (mm) bead-seat diameter (mm) tire width (mm) calculated wheel diameter (mm) calculated trail (mm) calculated flop (mm) (use the up/down cursor keys to Use this app to compare bike geometries of different manufacturers with each other, in order to determine the most suitable bike for your personal requirements. In this video, we clear the confusion and take an in-depth look at what fork offset is and how it will affect your ride. Beginning Fork Length: inches : Length from to top of the fork tubes to the centerline of the axle. Negative values: hub follows the steering axis (fork "bent backward"). 5 deg Head Ang, 51mm Fork Offset, 83mm Trail 64 deg Head Ang, 44mm Fork Offset, 132. The new 35 fork is the perfect value-for-money option for MTB and E-MTB bikes. FLH Series 27. Which one to choose? I have no idea. Apr 25, 2014 · As I understand, fork rake being the amount a fork is offset due to a curve. Here’s the tricky thing: for a given head angle, the greater the fork offset, generally, the less the trail. The fork I borrowed was a Quintana Roo fork with a 47mm offset and very close A-C. Mar 26, 2020 · A heavier bike needs a heavier load, Luckily your wallet doesn't necessarily need it. Report repository Bicycle Forks Shop top brands' best prices for new bike forks for your road, gravel, mountain, electric, or commuter bike. To calculate the head tube and seat tube angles of a bicycle frame, you can use the following formulas: Head Tube Angle (HTA) Calculation: HTA = arctan((Fork Length – BB Drop) / (Wheelbase – Fork Offset)) In this section, I walk you through an example calculation in detail. In your case, going from a 45cm to a 43cm offset 44mm vs. Adjusting these values can change the A trail value greater than 5 inches will generate excessive fork flop. 659 mm (I deducted the height difference because the fork with more offset was a slight bit taller. The bike comes stock with 29" wheels front and rear. First they showed up on Transition’s Speed Balanced Geometry bikes, then on the Ibis Ripmo, the Gen 4 Ripley, and now a slew of other bikes. Bicycle Speed and Power Calculator, comparing differend kinds of bicycles (Online-Calculator) Cadence Relation between gearing, wheel-diameter and speed (Online-Calculator) Steering Geometry Geometrical relation between Head Tube Angle, Trail and Fork Offset (Online-Calculator) Spoke Length Online Spoke-Length Calculator: Pedal Kick-Back With racing in its DNA and good times in its blood, FOX has enjoyed 50 years of going fast and taking chances. Trail is a key determining factor for how a bike handles. 5 days ago · When aftermarket forks became commonly accepted in the early 1990's, the differences in their lengths became apparent. 8mm Fox 40 203: 571. May 26, 2021 · Fork rake or fork offset is a key factor in the handling of a bike. Most bikes in the road racing realm have a head angle between 71- and 74-degrees. Head angle 69. Calculator updated 9/11/06 to provide more realistic trail values. The greater amount of trail will be a bit more stable, but both of these numbers are in the sport bike/race bike category, which will not be a bad ride. Cheap Suntour forks with [EDIT to correct to 63mm travel and 42mm offset. This is what really influences how a bike will react to rider input. Manitou USD suspension fork with 37mm stanchions, ABS+ damping and 203mm travel. 5” bike with a 65° headtube angle and a 36mm-offset fork. There’s more trail than the Spectral 27. Open-source Mountain Bike fit calculator based on RAD system - i8086m/OpenRAD (Steering/Hand offset) Forks. Exploring the effect of fork offset on bike handling characteristics. For Push-to-Lock forks only - route the cable housing from the remote lever, around the rear of the crown, to the fork topcap cable stop and cut to length. So here's hopefully a couple of simple questions? 1. You want to keep your head tube angle and height unchanged after making the swap. Comparing multiple bikes with some sagged and some not? 1 day ago · 1. 5 HTA with 50mm rake will put you into low-medium trail, so you can expect much faster, twitcher reaction from the bike - 7mm is a lot. Length will not change trail if the triple trees are not raked. It feels ever so slightly snappier. This equation is still being developed. Looking to calculate your bike’s geometry for changes to fork travel, wheel sizes your bike, anglesets, or any other common geometry modifications? Or maybe you want to directly compare geometry and fit of multiple bikes? Jul 15, 2019 · It seemed like offset would be specific to wheelsize, with 29ers dealt a longer offset, and 27. Assuming the head tube angle of the bike doesn't change, then a decrease in AC will increase trail. ) So if you change from a 465 mm fork with 42 mm offset to a same height fork with 46 mm offset, your front will be a hair short of 0. Bicycle forks Jun 15, 2024 · Increasing the fork travel can give you a smoother ride over rough terrain, but adding more offset can change how your bike feels when steering. By inputting these values into the calculator, riders can get a better understanding of how their bike’s geometry affects its handling characteristics. The bike that serves as an example is a Specialized Stumpjumper 2020 in size S4. Headtube Angle: degrees: Fork Rake (offset) mm: Wheel Size: Compare the geometry of multiple bikes or see the effects of tweaking your bike’s geometry. Fork offset. 4 = 53mm of trail. More offset reduces Trail and less offset increases Trail. the question is, will it be noticable? Using an online calculator: 45mm rake gives trail of 61. ZTZ 20/26 inch 5. Imagine a fork with such a short offset that it actually goes negative, bringing the front wheel further back with the same length fork will start to angle the frame back, slackening the head angle. Head Tube Angle – The angle that the frame holds the fork in relation to the ground (also called steering angle). 0 mm. Specialized and Orbea spring to mind. The new fork will have a longer Axle to Crown, which will slack your bike out as well. On the fork you linked, the steerer length is listed as 250mm, with the top 130mm threaded (leaving 120mm unthreaded). Visually compare multiple bikes. That all changed in 2017 when Transition launched SBG (Speed Balance Geometry); an acronym that for the first time in the brands’ history wasn’t a piss-take of the commonly heard marketing jargon; an indication of how serious they were about their bikes updated geometry. Sep 10, 2014 · These forks all have different axle to crown lengths and offsets. Apr 6, 2009 · I have finally nailed down a bad speed shimmy in my bike. What would happen if the Suntour forks were replaced with slightly less cheap Rockshox Judy Silver forks with 100mm travel and Mar 26, 2020 · Amazon. Dec 10, 2024 · Bikes are getting longer slacker fronts and shorter rears. A trail value greater than 5 inches will generate excessive fork flop. Hayabusa forks are 28. I consider to increase fork travel on my bike by 20 mm, and to fix the increase in bb height with some headangle changing headset (like Cane Creek angleset). Figure 2. 5” bikes (for now) but some brands like Transition and Yeti are offering 27. Fork Rake – Offset that places the fork ends ahead of the steering axis. You want to change your fork with one of a different offset. For example, we use the 51mm offset on the Trail 429. 24 mm Feb 5, 2020 · Fox and RockShox both offer 29er forks with a 44mm offset option and smaller brands such as MRP will allow you to go down to 41mm. And that’s why the high-trail bike is easier to steer around tight corners: It has more wheel flop, more ‘power steering. V-Rod 30". Test how fit is affected by adjusting or changing components. 75". Last winter where I demoed a Wreckoning in Sedona for 3 long days in the saddle. The amount that the fork is offset from this imaginary line is known as fork rake in road bikes, or fork offset in mountain bikes. The numbers actually don’t matter too much, but just so you have a basic idea of what this Sep 17, 2020 · Swapping from a fork with a 51mm offset – which was pretty standard on 29ers up until a couple of years ago – to a 38mm will reduce the length of the front centre by roughly 13mm. Model: 27. net And my current frame having 0 fork offset. Obviously, the 43mm will increase the trail, and slow the feeling of the steering down to an extent. Enjoy! 3. Steerer length. The head angle is the angle between the ground and the bike’s steering axis. So bumping up May 9, 2023 · Fork offset isn't even a direct factor in the steering behavior and there's no reason it should be a consideration when setting up your bar and stem. It feels amazing at speed, but I was really struggling on some tight corners yesterday. Road racing bicycle forks have an offset of 40–50 mm (1. 6 degrees SA 73. 3. Sep 23, 2019 · On modern, long geometry bikes with slack head angles, what happens after this as you initiate a tighter turn is the main difference in handling between regular and short offset forks. I got use to this bike with the 51mm offset longer travel fork right away. The head tube angle on the Icon 73 degrees and most manufactures seem to spec a 43mm with a 73 head tube. Wheel Radius = Fork Offset (rake) = Headtube angle = Actual Trail = 1. Fork length. . Fork Offset: Reducing the fork offset increases the trail, and increasing it reduces the trail. So I need to get a fork. Free delivery on orders above $99. The Role of the Head Angle and Fork Offset. 5" and 26". Fork offset has always been a component of bike design, but until last year it was Jul 17, 2018 · Fork offset for road bikes usually ranges from 40 to 55 mm, generating trail figures from 50 to 63 mm. 45". Bicycle Trail Calculator. 7 mm lower. I think I understand that reducing the offset will make the bike feel more stable at speed. Diameter of the front tire. 5in forks). For Push-to-Unlock forks only – route the cable housing from the remote lever, across the front of the crown, to the fork topcap cable stop and cut to Mar 12, 2009 · Just getting into larger wheels but w/ 26er's they run 38mm offset forks and lets say a 69-70 degree HA would be good for a trail bike. A longer travel fork can help absorb those bumps, making your ride more comfortable. Shop now! Nov 15, 2020 · Some forks come in a variety of different fork offsets for the same model. Along with head angle, the fork offset determines Trail. When you get into XL and XXL bikes the balance is FUBARed. Certainly not even half a Dec 5, 2024 · What is Fork Offset? Fork offset refers to the distance between the centerline of your bike’s steerer tube and the front axle. It’s the reason that some bikes can feel even shorter than their frame geometry numbers Fork Offset Bead-Seat Diameter 622 mm (700C) Tire Width RESULTS Tire diameter 752 mm Trail 94 mm Wheel flop 31 mm Bicycle Trail Calculator | yojimg. Feb 25, 2024 · These calculators take into account the wheelbase, fork offset, and tire size of the motorcycle to determine the rake and trail angles. 1mm) Aug 27, 2019 · Right now I have a 35mm stem and 38mm offset fork. Feb 1, 2020 · 1. Offset-- Centerline of top of steering neck to centerline of top of fork tubes. head angle (degrees) fork offset (mm) bead-seat diameter (mm) tire width (mm) calculated wheel diameter (mm) calculated trail (mm Dec 24, 2019 · IMO, if I were spec'ing bikes, I'd choose to simplify sizing to two choices, and make the smaller size bike have a slacker HA with longer fork offset (e. My Sektor fork has a 528mm axle to crown and 42 offset. Trail is the distance that the Mar 29, 2007 · My fork is a Forte Axis Pro from Performance. Apr 18, 2018 · The amount of offset does make a noticeable handling difference, but it's not as cut and dry as saying that X amount of offset is bad and Y amount of offset is good - there's more to it than that, and installing a fork with the least amount of offset possible isn't going to automatically turn your bike into a magical shred sled. Wheel Size: With a larger wheel, the axle is higher off the ground than a smaller wheel. Lesser fork offset will result in increased trail. Apr 28, 2023 · More fork travel helps you maintain control and go faster in gnarly terrain; A longer fork slackens your head tube angle, increasing stability; A longer fork raises your stack height, putting you in a better position on steep terrain; As a general rule, every 10mm change in fork travel leads to a 0. BB drop(2) Fork length(3) Fork offset(4) Top Oct 14, 2010 · I'm planning to change the fork on my Litespeed Icon. vdalsau smsu daqkg rmxiy vowtts xbqxfu phf wovjr sbdjx kproo