To achieve the best performance from your Fox suspension product, the proper measuring and setting of sag is vitally important. FOX redefines ride dynamics for ATVs, mountain bikes, motocross, off-road vehicles, snowmobiles, trucks, and UTVs. Diving into some fork offset talk, I first want to say that I am nowhere near an engineer, just a bike nerd who wants to wrap his brain around the options we now have. FOX FORKS; ROCKSHOX FORKS; CONTACT; LOGIN; Online tools for professional bike shop mechanics including a spoke length calculator and suspension fork Oil volumes. Using a 10mm socket, remove the air side bottom nut and crush washer. Modern forks are available in several sizes and shapes, and each one is designed for a specific riding style. I'm assuming they just did a travel change on a 160mm fork. Refer to stem manufacturer’s instructions to be sure there will be enough clamping surface for the stem. Page 6: Tire Sizes Measuring fork travel. FOX Forks. With the shocks still on the vehicle, get ride height from mount to mount. Notes: Rider Weight - 1kg = 2.2lbs, 1Stone = 14lbs. Because of it we can navigate rock-strewn trails with confidence. Spoke Calculator. You might need to use a small pick to remove the plastic crush washer. Release and use a ruler to measure the length of exposed upper tube below the sag o-ring. Page 5: Installing Fox 32Mm Forx 1. Shock stroke - 1inch = 25.4mm This is to give you a guideline of what spring rate you need, there are other variables that may require you to need a softer or firmer spring rate. Ride height is supposed to be in the middle of the shock travel length, so we're able to see how much travel you should have in both directions at the given height. Minimum Up travel suggestions (solid axle) Rock Crawling = 4” Trail Riding = 5” Desert Racing / Ultra4 Type = 7” We suggest dedicating 1/3 to 2/3 of shock travel for up travel, depending on application. I'm not sure if the fork can be reduced further, the Fox tech stated that fork came in 140mm and 150mm travel … This is especially true for a 4x4 that has been lifted, but is also important for a vehicle that has been lowered. Fox claims the fork can accept up to a measured 40mm tire. 2016 36 831 100mm forks can be reduced in travel … With increased trail, you get a more stable feeling bike. Next, measure the upper stack from where the upper pressed race would enter the head tube to the top of the adjusting race. Fox have sent through some more details of fork models that they adding to the product recall started last month. Sag range should be set to 15–20% of total fork travel. Popular makers of suspension forks include Cannondale, Fox, SR Suntour, Manitou, Marzocchi, and RockShox. Also, if there isn’t an on-the-fly travel reduction option, the fork will sit high in its travel. Roughly summed up, the 32 series of forks are made for cross-country and light trail use, the 34 forks are meant for all-around trail use, the 36 is for heavy-duty trail/all-mountain use, the 38 is for enduro riding and racing … Suspension fork design has advanced in recent years with suspension forks becoming increasingly sophisticated and diverse in design. From the first batch of forks advice is that if you have the 2013 Evolution Series forks manufactured between March 1, 2012 and November 30, 2012 then you should stop using them immediately. Australia's largest range of Fox Shox Mountain Bike dropper posts, suspension forks, rear air and coil shocks, springs, decals, seals, tools, fluid, pumps and more! After reading tons of articles, talking to people in the industry … Enduro racing bikes can have between 150-170mm travel on average and being able to adjust the forks set-up … With a bigger wheel size, there is more trail, since the axle is higher, creating more distance between the contact patch and steering axis. The amount of suspension travel available has increased over time. The shortest, the Tange 7B CrMo, is brazed with a traditional semi-sloping crown, and represents what for many years was the standard brazed steel fork. Remove the crown race from the fork. This information can be important to know when upgrading to a new shock or removing a shock for service. How to choose a mountain bike fork: Front suspension is what differentiates mountain bikes from the rest of the two-wheeled world. But the stanchions measure 150mm. Wheel Travel - 1inch = 25.4mm. WARNING: Modification, improper service, or use of aftermarket replacement parts with FOX forks and shocks may cause the product to malfunction, resulting in SERIOUS INJURY OR DEATH. If needed, travel can also be adjusted internally. Add all these numbers together. If I measure the stanchion its closer to 150mm, but actual travel I get is around 135mmish (I deflated the fork and tried to compress it all the way). Keep the bottom nut close by, you will need it in just a minute. The tradeoff, however, is that bikes with more trail take more … Naturally, there will be more trail on 29ers than 27.5-inch-wheeled bikes. Trail is the distance between the contact patch of the tire — where the tire touches the ground — and the steering axis. Member . The above diagram demonstrates a possible approach to measuring fork offset or rake. Mark or measure the distance, then measure the amount of travel once you have removed your weight. Set Sag. Fork offset is a damn tricky topic and like many things in the mountain bike industry, there are options and with options you have varying opinions. Remove existing fork from the bicycle. When suspension forks were introduced, 80–100 mm of travel was deemed … If your fork's travel is unknown, before sag is measured, fully compress the fork to bottom out. Rotate the knobs counter-clockwise until they stop. Interestingly, the limiting factor is actually the bottom of the steerer, as it will hang below the crown at full compression. Measure from the fork crown race to where the lower pressed race would enter the head tube. Your limiting factor could be the differential hitting the oil pan, the tires hitting your fenders, your driveshaft angle, cv-shaft angle (IFS), or your suspension binding. Fork was serviced two months ago and it is smooth and stictionless and there are no signs of seal damage (also confirmed during service that seals were perfect). To achieve the best performance from your FOX suspension, adjust the air pressure to attain your proper sag setting. Down Travel Using the same concept for compressed shock length, we need to measure for the extended length of the shock. The need for measuring shock absorbers arises when you change the ride height of your vehicle. Briefly, I was in possession of a bike in Dec'18 that looked like it had a 150mm Fox fork, the exposed stanchion measured 150mm, and both the sales guy and the workshop guy said it was 150mm. For solid axle vehicles this will need to be done in the horizontal, right tuck, and left tuck positions. The longest, the Tange CrMo TIG unicrown fork, can be found on many production road bikes made in the mid 1990's. Same day dispatch, expert local support and free shipping available! The 2016 36 831 uses an 831-specific transfer shaft that allows it to be run at 100mm travel in its stock configuration 2016 36 831 100mm forks can be extended to 130mm of travel. Fork measured travel - posted in Tech Q&A: So I have a X-Fusion Trace set at 140mm. 2015-2017 36 FLOAT 170mm forks can be extended to 180mm of travel. Skyliner. Is there any way to actually verify that they gave me the right travel? I have 29" Revelation forks that are 150mm. A simple, free and accurate calculator to measure the correct spoke length before building a wheel. This collection of forks is probably a good representation of the total range of road fork lengths in production. Longer-travel forks are generally heavier as they need to be overbuilt to prevent flex. Measure the height of the center of … More FOX forks recalled. Select the right Fox Shox components to suit your MTB. Measure the steerer tube length of the existing fork. 6 1 Before setting sag, set the dampers to the full open positions. Transfer this measurement to the FOX 32MM FORX steerer. We all know how opinions are, everyone has one and they all stink. Finally got some Float 140's arrive today (ebay) but the axle to crown is 10mm shorter than my 130's. If you are concerned about the travel, measure it to confirm that it is in fact 150mm. As a starting point, set sag for your fork or rear shock to 25% of active travel. Add any spacers and add the height of the stem. Measure the amount of travel … With the shocks off the vehicle, get fully extended and fully collapsed lengths, measuring mount to mount. Rest the steerer tube of the fork on a V-block on a perfectly flat surface. Mountain Bike Forks | FOX Fox Factory Inc. uses cookies to improve your browsing experience on our website. Fox Shox fork technologies glossary; All Fox Shox forks follow the same naming convention, where a number tells you the upper leg diameter in millimetres, which in turn gives you an idea of the end-user the fork is suitable for. This video also shows how to measure eye-to-eye length, travel, eyelet hardware width, and bolt diameter. Forks for general trail riding typically hit the ‘sweet spot’ of 120mm travel, while beefier All-Mountain forks come in around 140mm and are often available with 20mm or 15mm bolt-through axles for extra stiffness. Measure the height of the fork dropout off the top of the flat surface (Dim A). To measure your compressed lengths, move your suspension to the full compression position. Sag should be set to 15 – 20% of total fork travel. Fork came in a 160mm box, fox code is for 160mm. Using a 15mm deep socket, remove the damper side bottom nut and crush washer. If the shock is fully compressed before the suspension bottoms out, you will damage the shock. Sag is the amount your suspension compresses under your weight and riding gear. Dampers 2 Adjust. Posted: Apr 12, 2016 at 10:28 Quote: Thanks for the reply. I know measuring the stanchions doesn't really work as my 160mm diamond has 165mm stanchions and my 160mm mezzer has close to 170mm stanchions. Measure the range of motion for your shocks in the fork by fully compressing it by applying your full weight to the handlebars until you feel it bottom out. The shock on a vehicle needs to match the suspension travel. Fox also includes a new star nut so all you have to do is swap the headset race from your old fork, measure the steerer tube length, cut, insert the new star nut and slide it in the frame. Measuring & Setting Sag. Best performance from your Fox suspension, adjust the air pressure to attain your proper setting! Travel … the above diagram demonstrates a possible approach to measuring fork offset or rake 2016 831... Below the sag o-ring a shock for service design has advanced in years... It in just a minute proper sag setting suit your MTB stem ’. To stem manufacturer ’ s instructions to be overbuilt to prevent flex range should be set to 15–20 of. This video also shows how to choose a mountain bike fork: Front suspension is what differentiates bikes! 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