Fox 36 lower legs

Fox 36 lower legs DEFAULT

Your complete guide to the Fox fork range

Fox has a long history in the world of shocks in both mountain biking and motocross, but their first mountain bike suspension fork was launched back in 2001. It proved a huge hit and this 32 chassis was quickly followed by the burly 36, downhill 40 and then the trail 34 and super enduro 38 forks, all available in a number of specs to suit different budgets.

Our guide will run you through the current Fox front fork range, including all the different models, the specifications available for each of those and what all means, in order to help you find which one is best for you and your budget.

[Updated 7th April 2020]

All Fox 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. 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 while the dual crown 40 is made for downhill and extreme gravity riding. All of Fox's aftermarket forks use air springs.

In addition to these base chassis designs, here are a number of different specification levels for each of them, which is why the Fox fork range adds up to around 160 different models...

Factory Series forks

This is the highest level of Fox fork and is priced accordingly. All these models have high-end FIT4 and FIT GRIP 2 dampers and use the distinctive golden 'Kashima' coating on the upper legs to reduce friction and increase wear life. The Kashima treatment creates microscopic pores on the upper legs that retain lubricating oil as the forks cycles through the travel, making it much slippier.

Performance Elite forks

This is the middle of the Fox forks range and while they share the same high-end damper technologies as the Factory forks with FIT4 and FIT GRIP2 options, the upper legs just have a black anodised finish rather than the Kashima coat.

Performance forks

This is the entry-level specification of Fox forks that are available on the aftermarket. Different, less complicated FIT GRIP dampers are used and the upper legs are again black anodised. The lower legs are the same as the higher end forks, however.

Rhythm forks

This is an original equipment (OEM) only level of fork that you'll on see specced on complete bikes. The Rhythm forks have a slightly less adjustable GRIP damper and the lower legs are cast from a heavier but more affordable grade of aluminium to keep costs down. 

Step Cast models

Fox has introduced 'Step-Cast' versions of both the 32 and 34 series, which use a narrower stance plus slimmed down, stepped lower legs to help reduce weight. They're pitched at the lightweight cross-country and lightweight trail markets respectively.

E-Bike models

There are also E-bike specific versions of the Fox 34 and Fox 36 series. These use thicker-walled upper legs to increase stiffness and so deal better with the extra bulk of an electric bike. The trade-off is that they're heavier.

Fox 32 fork range 

The Fox 32 Step-Cast is available for 650b and 29" wheel sizes in Factory and Performance spec, all having 100mm of air-sprung travel, a tapered steerer and standard or Boost hub spacing with a 15mm through axle.


Factory-level forks get a sealed FIT4 cartridge damper which has a three-position compression adjuster with a low-speed fine-tuning adjuster in the open mode, plus rebound damping adjustment. There is also a two-position bar-mounted lockout available.

Performance forks use a GRIP cartridge damper which offers three-position compression adjustment.

There is also a special version of the 32 Step-Cast called the Fox Step-Cast AX or Adventure Cross. It's specially modified to work on gravel bikes with 700c or 650b wheels and has just 40mm of travel from a specially converted spring. It uses a FIT4 damper.

The Fox 32 Factory fork is available in both 29" and 650b wheels with 120mm of travel, a 15mm through-axle and a tapered steerer. The FIT4 damper and Float air spring are used, though there is the option of a two-position bar-mounted remote instead of the top cap mounted adjustments the FIT4 has as standard.

The Fox 32 Performance fork is available in 26", 650b and 29" wheel sizes, all with a three-position GRIP damper. The 26" fork has 100mm, 120mm and 140mm travel options with either an open 9mm or bolt-through 15mm axle, plus straight 1.125" or tapered steerer. The 650b fork only comes with 100mm travel and a 9mm open axle and a tapered steerer, while the 29" fork comes in 100mm with a 9mm dropout or 120mm with a 15mm through-axle.

Fox 34 fork range

Again, there is a Step-Cast range of 34 forks, which start with the 34 Step-Cast Factory. Only available in the 29" wheel size, it comes with 100 and120mm travel options and 44mm, and 51mm offsets with Boost hub spacing and a tapered steerer. As always, it's got Kashima coated upper legs and uses the FIT4 damper with remote option, though both this and the air spring have a dedicated tune. This one also gets a tuneable negative air spring and space for up to a 2.4" tyre.

2022 fox 34 SC.jpg

There's also the 34 Step-Cast Performance fork, which only comes at a 29" wheeled, Boost spaced, tapered steerer 120mm travel model with GRIP three-position damper.

2022 fox 34 factory.jpg

The standard chassis range is topped by the 34 Factory which comes with the FIT4 three-position damper for 2022. Like its Step-Cast sibling it only comes in a 29" wheel option but unlike the Step-Cast model, there are 130mm and 140mm travel options. A tapered steerer is the only option but you can get it in Boost and non-Boost spacing for a 15mm axle. This model can also fit up to a 2.6" tyre,

The 34 Performance Elite does without the Kashima coating but retains the FIT4 damper. It only comes in 29" options and with 130mm of travel.

2022 fox 34 performance elite.jpg

The 34 Performance uses a three-position GRIP damper and it's only available in the 29" wheelsize. It gets 140mm of travel and space for up to a 2.6" tyre.

2022 fox 34 performance.jpg

When it comes to e-MTB specific models, there's only one. The 34 E-Bike Performance gets a GRIP damper and black anodised upper legs made from thicker-walled tubing than the conventional range. It only comes in 120mm travel with Boost spacing, whether in 650b or 29er form.

Fox 36 fork range 


Fox's 36 range was overhauled for 2021, moving it to more of a long-travel trail bike fork as the 38 picks up the enduro duties, with travel being capped at 160mm. New features include air bleeders on the lower legs, new internal channels to reduce pressure build-up in the lowers, a floating axle and an updated version of the EVOL air spring and FIT GRIP2 damper.

The 36 lineup is topped by the Fox 36 Factory which is available for 26", 650b and 29" wheels and only comes with an EVOL Float air spring.

The 650b fork comes in 150mm and 160mm travel options, with either an updated version of the four-way adjustable FIT GRIP2 damper for £1,199 or the FIT4 damper for £1,139. It's tapered steerer with Boost spacing only and you can have 37mm or 44mm offsets.

The 29" fork comes in 150mm travel options with a FIT4 for £1,139 or with a FIT GRIP2 in 150mm and 160mm for £1,199. Offset options are 44mm and 51mm.

When it comes to 26" wheeled versions, these use a different chassis based on an older version of the 36. There's a dirt jump bike specific model called the 36 Factory 831 26 which only comes in 100mm travel, plus a trail model in 160mm and 180mm travel options. Both have a FIT GRIP2 damper with a non-boost 15mm axle that can be converted to 20mm. There are straight or tapered steerer options. RRP is £1,179.


Fox 36 Performance Elite forks only use a FIT GRIP2 damper and both are 650b and 29" forks are only in 160mm travel. You can only get Boost spacing and a tapered steerer in these forks. RRP is £1,099.

The 36 E-Bike Factory fork is available as a 29" fork with 160mm of travel (though of course 650b Plus tyres fit into this model) with a FIT GRIP2 or FIT4 damper, Boost spacing and tapered steerer and your pick of 44mm or 51mm offset. It also comes in 650b with 140mm, 160mm or 180mm travel options.

The 36 E-Bike Performance fork only comes in a Boost 29" version with 160mm of travel but has black anodised upper legs and uses a three-position GRIP damper. Offsets are 44mm or 51mm.

Fox 38 fork range

38-factory-grip2-glossorange-hero copy.jpg

The new for 2021 Fox 38 forkis designed as a hard-hitting, long-travel enduro fork, replacing the longer travel variants of the 36. It gets air bleeders on the lower legs, new internal channels to reduce pressure build-up in the lowers and an updated version of the EVOL air spring and FIT GRIP2 damper. It also uses a steerer tube that has an oval internal profile to help beef up a highly stressed area.

The range-topper is the Kashima coated Fox 38 Factory, which is only available with a FIT GRIP2 damper and 160mm, 170mm or 180mm of travel. The 650b forks have offset options of 37mm or 44mm, while the 29" forks come in 44mm or 51mm. RRP is £1,299.

The Fox 38 Performance Elite only comes in 170mm travel with a FIT GRIP2 damper. Both the 650b fork and the 29" fork have an offset of 44mm and cost £1,199.

The Fox 38 Performance only comes in 170mm travel with a GRIP damper. Both the 650b fork and the 29" fork have an offset of 44mm and cost £1,049.

There's also an e-bike specific version, the Kashima coated Fox 38 E-Bike Factory. It's only available as a 180mm travel, FIT GRIP2, 29" fork with 44mm offset and costs £1,299.

Fox 40 fork range


When it comes to aftermarket options, you can only buy a Kashima coated, air-sprung Fox 40 Factory,  but there are a trio of wheel size options, with 26", 650b and 29" options. All have 203mm of travel, FIT GRIP2 dampers and straight 1.125" steerers. The 26' and 650b forks have a 20mm through axle, but the 29er - now known as the Fox 40 Factory - gets a 20mm Boost axle.

The 40 range had a makeover for 2021 with similar air channels in the lowers as the 36 and 38 forks, plus similar chassis revisions.

There are also Fox 40 Performance level forks, but these are original equipment for manufacturers only.

Fox has a number of technologies that they use exclusively on their forks.

  • Float EVOL air spring: This is Fox's air spring system used across the entire range. The EVOL part stands for 'Extra VOLume' and indicates that it has a larger negative air spring than previous Float designs in order to make . the initial part of the travel more linear.
  • FIT 4 damper: This is one of Fox's premium cartridge dampers. The name stands for 'Fox Isolated Technology. It has a three-position compression adjust via the blue lever on the top car with fine-tuning adjustment in the open mode via the black knob, or there is a two-position remote lockout available. It also has a rebound adjustment at the bottom of the leg. It uses a sealed design with a rubber bladder to compensate for displaced oil as the damper cycles through the travel.
  • FIT GRIP damper: This is the damper fitted to more affordable models in the Fox fork range. It has a three-position compression damping adjustment from a blue lever at the top of the leg and a rebound at the bottom. It is a semi-sealed cartridge that uses a sprung piston to compensate for displaced oil, with a feature that allows it to bleed excess oil as needed.
  • FIT GRIP2 damper: This is a premium damper seen on Fox's gravity focussed forks. It has the same basic architecture as the FIT GRIP damper - namely a sprung piston - but it has much more adjustment, with both high and low-speed compression damping adjustment and independent high and low-speed rebound damping on offer too. It uses something called Variable Valve Control adjust the high-speed rebound damping, which alters valve flex rather than preload, which Fox say "provides the same effect as revalving high-speed rebound but without the need for damper disassembly". It also has a different mid valve, plus various friction reducing treatments over the standard GRIP damper. 
  • Kabolt axle: This is an axle that can be used to replace the standard flip-lever 15mm through axle found on Fox forks. It's lighter than standard but requires a 6mm Allen key to undo.
  • Kashima Coat: This is a hard anodising surface treatment created by Miyaka Company of Japan. It consists of "lubricating molybdenum disulfide deposited via electrical induction into the billions of micro-pores on the surface of hard-anodized aluminium for better lubrication and less abrasion and wear."
  • Lower leg channels: These are seen on the new 36, 38 and 40 lower legs and are an air channel that increases the amount of air volume in the lower leg of the fork. As a fork compresses, the air that's trapped inside the bottom of the lower leg is squashed and this acts like another air spring to the main one, giving a resistance to bottoming-out that the rider can't tune, making it hard to get full travel.

    This greater volume provides less ramp-up effect, meaning the air spring can operate without this interference. It's also allowed them to use a greater volume of lubricating oil in the lower and provides a pathway for that oil to get higher up into the bushings and seals, meaning your fork should stay smoother for longer.

  • Volume spacers: All Fox Shox forks allow the user to control how progressive the ending stroke of the fork is by using volume spacers. These require you to undo the top cap of the fork's air spring side leg and then add or remove clip-on spacers. Adding more increase the resistance to bottoming out, while removing them does the opposite. The volume spacers are specific to fork models and colour coded to match. The thicker legs on E-Bike specific forks require you to use a spacer from the fork below it; a 36 E-Bike fork would use the spacer for a standard 34 fork, not a standard 36 fork.


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2019 Fox Float Factory 36 Grip 2 Service

I get immense satisfaction from fixing things. When it goes well. With youtube as my guide, I recently tore apart our non-functional clothes dryer. It was making a noise pulled from a sci-fi thriller, the moment just before a planet is obliterated, and the drum wouldn't turn. On the journey to get it fixed, I took the entire machine apart and put it back together twice and, because it's a steam dryer with a water supply, flooded our basement. Twice. That's the kind of handyman I am. In the end I got 'er done for a total of $17.54 in parts.

Maintaining, cleaning, and any other tasks that prolong the life of the machines in my life are similarly satisfying (and often as fraught with missteps). Maintenance takes a much lower priority than it should however. Going to the dentist is automatic when it feels like an ice pick is stabbing your tooth, but if it aches periodically, or nothing hurts at all... that can probably wait.

Note: this is meant to be an overview of the process rather than a comprehensive how-to guide, but it's probably enough for most of you to get 'er done. Consult youtube for several good step by step guides.

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The Fox Shox 36 Float Factory Kashima fork offers the best-of-the-best technology Fox has to offer. With all the hallmarks of a fork that has dominated world series events, the Fox 36 is the fork of choice for countless riders on podiums all across the world.

The 36 features all the innovations from Fox such as the floating axle, lower leg bypass channels, lower leg bleeders, redesigned arch, and variable valve control (VVC).  Seasoned dial twiddlers will want to opt for the ultimate tunability offered by the Grip 2 damper, but if you get bamboozled with your fork settings, then you'll love the 3 Way on-the-fly adjustment of the FIT4 damper. 

Who this for? The 36 is designed for hard-charging riders on long travel All Mountain and Enduro bikes. It likes steep, rough, technical trails and riding back to the top for more. The Grip 2 damper offers incredible potential for tuning and adjustment, enabling you to dial it in to perfection...or make an absolute dog's breakfast of it. You'll need to have a solid grasp of suspension tuning and be willing to put in the effort to do some dedicated bracket testing to get the most out of the Grip 2 damper.

If you just want your fork to feel great with a minimum of fuss, go for the FIT4 damper.

Spring type: This fork features the EVOL air spring which uses a larger negative air volume to create a linear spring curve that delivers plushness off the top, extra mid-stroke support and a more tunable bottom out.

Wheel size compatibility: Available in 27.5" and 29" options.

Starting weight: 1965g

Fork offset: The 36 is available in different fork offsets to suit the geometry of the bike it's being installed on. Available options are dependent on the colour chosen.

  • Gloss Black: 37, 44, 51mm
  • Gloss Orange: 44mm

Suspension travel amount: Available options are dependent on the colour chosen.

  • Gloss Black: 150, 160mm
  • Gloss Orange: 160mm

Compression damper style technologies/adjustments: The Fox 36 is available with either the Grip 2 or the FIT4 damper.

Grip 2: The Grip 2 damper features variable valve control (VVC) in the compression circuit, offering adjustable high and low-speed compression damping and more potential for tuning internally.

  • High-speed compression: (with VVC): 8 clicks
  • Low-speed compression: 16 clicks

Rebound damper technologies/adjustments: The Grip 2 damper also features VVC in the rebound circuit, offering adjustable high and low-speed rebound and more potential for tuning internally.

  • High-speed rebound: (with VVC): 8 clicks
  • Low-speed rebound: 16 clicks

FIT4: Now in its fourth generation, the FIT4 damper offers three on the fly compression damping options. Choose from Open, Medium, or Firm to quickly adapt the fork to the trail conditions. 

Factory series forks also feature 22 clicks of low-speed compression adjustment in the Open mode, allowing riders to dial in their exact preference.

  • On-the-fly compression damping options: Open, Medium, Firm.
  • Low-speed compression Open mode adjustment (Factory series only): 22 clicks
  • Low-speed rebound adjustment: 10 clicks

Travel adjustability: There are no external controls to adjust the length of travel but you can do this internally by installing a different length air shaft (available separately).

Volume Adjustment: Mid-stroke support and bottom-out resistance can be tuned via internal volume spacers. The number of factory-installed spacers and the max number of spacers will vary according to the length of travel.

Factory Installed Spacers:

Max Volume Spacers

Stanchion diameter: As the name may suggest, this fork has 36mm stanchions.

Axle size and style: The 36 is available in 110x15mm thru-axle with either a quick-release lever or a Kabolt-X single-sided pinch bolt design. The fork features a floating axle to create a perfect chassis alignment and eliminate unwanted friction between the uppers and lowers throughout the entire length of travel. This system sets the spacing via an adjustable floating sleeve on the axle, allowing repeated front wheel removal while maintaining perfect alignment.

Steerer tube standard: The 36 features a steerer with a standard 1.5 - 1 1⁄8" external taper. 

Lower Leg Arch: Just like the new 38 and 40, the 36 features an all-new lower leg arch that has been designed to pair perfectly with modern long-travel frames with larger head tube designs and shorter fork offsets. The new design juts forward slightly to provide ample head tube clearance at full compression.

Brake mount style: This fork has 180mm post mounts allowing you to mount a 180mm rotor to the fork directly without the need for an adaptor. 203mm and larger rotors will require the appropriate adaptor.

Brake rotor compatibility

  • Minimum rotor size: 180mm
  • Maximum rotor size: 230mm

Other Technology:

Lower Leg Channels: Specially designed channels in the lower legs minimise the effects of unintended pressure ramping by increasing the air volume and allowing for the splash oil to be circulated within the fork to lubricate the foam rings and bushings as the fork moves throughout its travel.

Bleeders: Bleeders on the rear of the fork allow for the air pressure in the lower legs (not the air spring) to be equalized to the atmospheric pressure at your riding location. This prevents any unwanted pressure build-up from diminishing small bump sensitivity or preventing full travel from being achieved.

Pros: The ultimate in stiffness and performance in a single crown fork. All the bells and whistles in a package that can be pedalled back to the top of the hill multiple times.

Cons: This is a gravity focussed fork and is quite big and heavy compared to some other All Mountain forks with smaller stanchions.


How to drain and replace the oil in your Fox 36 forks.

With the Fox 36’s high price tag comes high performance and it pays to look after it. Here we show you how to do a basic Fox 36 service.

>>> The best mountain bike suspension forks

The Fox 36 uses a bath of lubricating oil in the lowers to protect its moving parts, and over a period of time, dirt and other contaminants can enter the fork, reducing the lubricity and protection of the oil.

On top of this, oil can also escape, which is normal, so you’ll need to top it up regularly.

Need to know

  • Time Taken: 45-60 mins.
  • Difficulty: Medium.
  • Tools Required: 10mm/15mm socket wrenches, soft mallet, pick, 2mm Allen key, syringe, 20wt Gold fork fluid, tub/bucket, shop towel, suspension grease.

Your Expert

Charlie Collins. Charlie has been fixing bikes since 2005 — for the last couple of seasons, he has been working as a World Cup DH mechanic for the Pivot and Kona teams.

Fox 36 service step-by-step

1. Remove the fork from your bike and clamp the steerer in a bike stand. Ensure fork is thoroughly cleaned externally, notably around the seals.

2. Using 2mm Allen key, loosen grub screw and remove rebound adjuster.

3. Using 15mm socket for damping side and 10mm socket for air-spring side, undo both foot nuts three turns.

4. Using the corresponding socket for each foot nut or the proper Fox removal tool, gently tap to release inner shaft from its seat.

5. Fully unthread foot nuts, ensuring crush washers come with them. Now turn the fork upright and remove lowers over tub/bucket to catch any escaping oil.

6. Clean all fork components using shop towel to ensure dirt and oil is removed.

7. Inspect seals and fork tubes for damage or any signs of wear. Replace parts if necessary.

8. Carefully pry out foam rings using pick, avoiding any damage to lowers, seals and bushing.

The foam rings can trap dirt particles, so it’s advised to replace them if they are excessively dirty to prevent premature wear.

9. Clean using a tamping method with shop towel removing any dirt/old oil. Now leave to soak in 20wt Gold fork fluid.

10. Refit soaked foam rings into their housing. Lightly grease seals using suspension grease.

11. Carefully slide lowers on upper tubes, being careful not to pinch seals or foam rings as you insert. Don’t slide them fully on at this point.

12. With the fork slightly inverted again, insert the correct amount of fluid into the bottom of each leg using a syringe through the lower holes.

13. Slide fork lowers on completely so the inner shaft threads exit the lower holes. Refit crush washers and foot nuts onto shaft threads. Nip foot nuts tight to 5-6Nm.

14. Refit rebound adjuster and cover. Wipe down to remove any excess oil. Refit fork to bike.


Lower fox legs 36




The legendary 36 is no stranger to accolades, winning awards, accolades, and EWS races with equal panache. 36 offers an unmatchable combination of performance, tunability, and light weight to ensure the winning ways continue, everywhere from big backcountry routes to the EWS circuit.

36 Orange
36 Orange
36 Black

The legendary 36 is no stranger to accolades, winning awards, accolades, and EWS races with equal panache. 36 offers an unmatchable combination of performance, tunability, and light weight to ensure the winning ways continue, everywhere from big backcountry routes to the EWS circuit.

36 & 38 Floating Axle


Floating axles might look similar to other axles, but in fact they offer a distinct performance advantage due to their unique ability to match the exact width of the fork’s wheel mounting surface precisely to the front hub flange spacing, thus creating perfect chassis alignment and eliminating unwanted friction between the upper and lower fork legs. Floating axles provide much smoother suspension movement throughout the entire range of the fork’s travel, notably improving sensitivity and overall ride quality.

The all-new 36 and 38 come equipped with a new quick-release lever operated patent-pending floating axle system, combining the benefit of a floating axle with the ease of a tool-free quick-release. With this system, spacing is locked in via a floating sleeve, allowing repeated front wheel removal and reinstallation while maintaining perfect fork alignment. Floating sleeve positioning comes preset from the factory so if you are unsure of how to operate the floating axle system or simply don’t want to bother with it, you can just install the front wheel and get on with your ride.

Available optionally is the new Kabolt-X, a lightweight bolt-on floating axle exclusively for the all-new 36 and 38 that not only shaves grams but also increases torsional stiffness via its sleeveless, single-sided pinch bolt design. Chassis alignment must be reset each time the front wheel is removed and reinstalled on both the Kabolt-X and 40 floating axles, but the end result is the same – perfect alignment and perfect performance.

Lower Leg Channels


As a fork compresses, the air volume within the lower legs decreases, increasing air pressure. The more the fork compresses, the more pressure increases. This effect can have the unintended consequence of preventing full travel from being achieved. Our lower leg channels help alleviate this issue by dramatically increasing air volume within the lower legs and thereby reducing the amount of additional unintended pressure ramping.

Another benefit of these channels is that lower leg bath oil is circulated to the upper reaches of the lower legs, continuously lubricating the foam rings and bushings as the fork compresses and extends through its travel.

Lower Leg Channels


Our lower leg bleeders allow for atmospheric pressure equalization at the simple press of a button. Pressure build-up in the lower legs dramatically decreases fork performance, preventing full travel from being achieved, and diminishing small bump sensitivity and responsiveness.

Lower Leg Arch


Stiffness-to-weight is the ultimate metric for bicycle design. Engineers invest countless hours poring over every ounce of material in an effort to optimize this critical ratio. Our all-new lower leg design pulls out all the stops, shaving every possible gram while making sure not to compromise stiffness or strength requirements of modern enduro and gravity style riding.

Modern frame designs and geometry trends require modern suspension design solutions. The arch design of the all-new 36, 38, and 40 is designed to pair perfectly with modern Enduro and Downhill bikes. Head tube profiles have grown larger and larger, and fork offsets shorter and shorter. Our new arch shape takes this need into account by jutting forward to provide ample headtube clearance at full compression. State-of-the-art computer modeling techniques helped us to create an organic lower leg shape that optimizes stiffness with the absolute minimal amount of material.

Lower Leg Arch


Our GRIP2 damper is the benchmark for unparalleled ride quality and ultra-precise adjustability. GRIP2 includes our patented Variable Valve Control (VVC) technology which allows for external fine-tuning of suspension performance. GRIP2 achieves with the twist of a knob what typically requires the time consuming and complicated task of completely disassembling and reassembling the fork.



EVOL technology increases negative air spring volume, optimizing small bump sensitivity. EVOL’s linear spring curve delivers plushness off the top, extra mid-stroke support, and more tunable bottom-out progression.

The benefits of EVOL are further enhanced by our new Lower Leg channels and Bleeders, which both function to reduce air pressure captured in the lower legs, allowing the EVOL air spring to operate freely without unintended interference.


“Factory” says it all – feature-packed and designed to exceed the demands of our Factory-level riders. What we sell is what they race. Factory Series products feature slippery smooth, ultra-durable Genuine Kashima Coat.

Wheel Size27.5 / 29
Travel150 / 160*
Rake44 / 51*
Axle15QR x 110
All 36 Factory FIT4 Forks
Upper Tube FinishKashima Coat
Air ChannelsYes
Floating AxleYes
Rotor Size180 direct Post Mount, Up to 230 compatible
Mud Guard MountOptional FOX 36/38 Mud Guard with sturdy 4-point direct-mount attachment
Steerer1.5 Taper
Starting Weight1965 g

* Use the FORK BUILDER below to see model configurations

36 Factory FIT4

In its fourth generation, our patented FIT4 closed cartridge system provides three on-the-fly compression damping positions—Open, Medium, and Firm—to adapt to varying trail conditions.

Factory Series forks feature an additional 22 clicks of low-speed compression adjust in the Open mode, allowing riders to fine-tune their exact damping preferences.

Three on-the-fly compression damping positionsOpen, Medium, Firm
Additional low-speed compression (Open mode adjust)22 clicks
Low-speed rebound10 clicks
36 Factory FIT4
36 Factory FIT4
36 Factory FIT4


Choose from 13 models:

Check any box to start exploring available configurations:

Part Number is XXX-XX-XXX(check any box to continue)








SeriesFactoryPerformance Elite
Wheel Size27.529
Axle Style15QRKabolt-X
Axle Width110
AdjustmentsHSC/LSC HSR/LSR3-Position LeverOpen Mode Adjust
Air SpringFLOAT
Upper Tube FinishKashimaBlack Ano
Steerer1.5 T
ColorMatte BlackShiny BlackShiny Orange



36/38 small mudguard mounted


Keep the mud off your fork and out of your eyes with this optional add-on Mud Guard designed specifically for 2021 and newer FOX 36 and 38 fork models. Mounts directly to the fork thanks to a proprietary 4-point direct mount system.

36/38 standard mudguard top
36/38 standard mudguard side
ALN riding the 36
36 tuning guide


Learn how to quickly set sag, air spring pressure, compression adjustments, rebound adjust, additional tuning options and more.

The recommended settings in this tuning guide are designed to be a starting point, in order to get you out on your first ride in as few steps as possible.



To best maintain the performance and durability of your product under normal use, FOX recommends that you have regular fork and shock maintenance performed according to the service intervals.



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