Fox Racing Shox has been one busy critter this winter…they’ve just introduced their new 34 series of long travel 29er forks, tweaked the tune on their FIT cartridges based on travel, improved internal and external seals, updated the Kashima coating and rolled it out across more forks and opened it up to OEM and figured out a way to make a stiff titanium crown/steerer tube.
UPDATED 4/19 – More info and a couple of tweaks to the original info notated throughout the post.
It’s a lot to cover, so dive on in after the break and see the future of Fox’s suspension technology…
Given the growth of longer travel 29er bikes and the stunts riders are pulling on them, Fox saw fit to build a stronger fork. The new 34 class uses 34mm diameter stanchions and are built for longer travel 29ers, offering 140mm of travel. The lowers are beefier, too, evidenced by the massive arch shown above, developed to handle the stresses of the longer axle to crown distance on 140mm travel 29er forks.
There will be Float and TALAS (140 to 110) versions with Factory and Evolution options for OEM as of now, and Factory level for aftermarket. All of them will have tapered steerers and 15mm thru axles only. Available in July. They still have the 32-series for shorter travel XC bikes.
NEW FAMILY GROUPS
Mentioned above, you may wonder what Factory and Evolution are. For 2012 model year (and presumably beyond), Fox has grouped their forks into three categories:
- FACTORY is best of the best and has all of their latest technology
- PERFORMANCE is high end with FIT cartridges on most forks
- EVOLUTION is the entry level with mostly open bath internals on forks
KASHIMA COATING
Introduced last year as an aftermarket option only, for 2012, Kashima coating is open to OEM also. If the plethora of bikes at other booths is any indication, you’ll be seeing it on pretty much every high-end mountain bike by mid-summer. It will be on all Factory level products.
Why the change? Kashima products are coated in Japan then built in Watsonville, CA, so there were logistics and shipping issues that they wanted to figure out before rolling it out across their entire product range. Fox has the exclusive on it, too, in case you missed that in the original news we posted. A new Kashima coat for 2012 models is a little darker and ever so slightly more slippery, which is really more of a cosmetic thing, and they get Kashima branding on the stanchion. Fox has heard from their athletes that the coating makes the sliders less susceptible to scratching, too.
As previously leaked, their shocks have Kashima on the canister and Air Sleeve, too. In order to coat the piece, the entire piece has to be done, so the inside of the air canister is coated, too, meaning the main air seal slides on a smoother surface inside the shock.
Coilover shocks get a Kashima option on the shaft, too. Unrelated but interesting, the DHX RC4 has a boost valve adjustment called bottom out control that controls the ramp up in the last third of travel. The blue knob cranks down to adjust the volume of the boost valve chamber. Just FYI.
PRO PEDAL GETS ADAPTIVE LOGIC
WHAT THOSE TUNE NUMBERS MEAN ON THE SHOCKS
- Boost Valve tune = A position sensitive damping change based on the PSI in the Nitrogen chamber. A higher number means firmer valving earlier in the the compression stroke, which means more damping without changing the spring rate. For more on what Boost Valve actually is, check out this post.
- Velocity Tune = Compression damping via valving, which overlaps a bit with the boost tune and is affected by ProPedal settings.
- Rebound Tune = Rebound damping by shims and an orifice controlled by the rebound knob.
NEW FIT CARTRIDGES AND SEALS – THINGS GET SLIPPERY-ER

“The trail tuned 130mm+ travel dampers are for FIT RL and FIT Remote only (because the user cannot adjust their low-speed compression setting as it is set at the factory). The trail tune is still firmer in low-speed compression than last year’s FIT RL or FIT Remote so that it is less wallowy/brake-divey than previous model years. For all FIT RLC, RL and Remotes we reduced the high-speed compression damping from last year so that the fork is less harsh on square-edge hits and drops to flat. But RLC’s are the same exact tune whether it is 80mm or 160mm of travel (because the user can adjust their low-speed compression setting to wherever they want it).”
FORGET CARBON, FOX GOES WITH TITANIUM
NEW REMOTES ON SOME MODELS
- The Shimano remote will be used on the FACTORY level. (45.81 grams, no cable) – Shimano unit has been in use by FOX already since MY2010.
- The new FOX remote will be used on the Evolution level. (31.65 grams, no cable) – FOX unit is completely new for 2012