Models:

RS 35mm Ramp Control Cartridge Model A

…will fit 2013-2016 Pike forks with 15×100 axle spacing and 2010 and newer Boxxer World Cup (air-sprung) forks. Solo air models only.  Recommended for 140mm+ 29”, 27.5+, 26” and  27.5” forks.

RS 35mm Ramp Control Cartridge Model B

…will fit 2015 and newer Pike forks with “Boost” 15×110 axle spacing, all 2017 and newer Pike forks, and all 2015 and newer Lyrik and Yari forks (regardless of axle spacing). Solo air models only. Recommended for 140mm+ 29”, 27.5+, 26” and  27.5” forks.

RS 35mm Ramp Control Cartridge Model C (long-body)

..will fit 2013-2016 Pike forks with 15×100 axle spacing. Solo air models only. Recommended for 120 and 130mm 29” and 120mm 26” and 27.5” forks. Solo air models only. Recommended for 120 and 130mm 29”/27.5+ and 120mm 27.5” and 26” forks.

RS 35mm Ramp Control Cartridge Model D (long-body)

..will fit 2015 and newer Pike forks with “Boost” 15×110 axle spacing, all 2017 and newer Pike forks, and all 2015 and newer Lyrik and Yari forks (regardless of axle spacing). Solo air models only. Recommended for 120 and 130mm 29”/27.5+ and 120mm 27.5” and 26” forks.

RS 32mm Ramp Control Cartridge Model E 

..will fit 2013 and newer Reba, Revelation, and SID forks and 2014 and newer Rock Shox Bluto forks. Solo air models only. Recommended for 100-140mm 29”, 27.5+, 27.5”, 26”, and Fat forks.

FURTHER COMPATIBILITY INFO:

• If you are unsure about which model to choose for your fork, consult this page for further help with identification.
• Maximum high-speed ending-stroke effect roughly equal to 4 standard Bottomless Tokens.
• Cartridges are incompatible with Vorsprung Suspension’s Luftkappe in 150mm and 160mm Pike,  and 170 and 180mm Lyrik and Yari forks. 
• All cartridges are incompatible with Pike DJ forks.
• Following installation, all users should check for appropriate mechanical bottom-out  before hitting the trail.

Fox 34, Version A

     …will fit 2016 and newer Fox 34 Float forks with the FIT 4 and Grip dampers. Recommended for 140-160mm 29”, 27.5+, and 27.5” forks.

Fox 34, Version B (long-body)

     …will fit 2016 and newer Fox 34 Float forks with the FIT 4 and Grip dampers. Recommended for 110-130mm 29”, 27.5+, and 27.5” forks.

     FURTHER COMPATIBILITY INFO:

• Maximum high-speed ending-stroke effect roughly equal to 4.5 standard Fox volume spacers.
• Cartridges are incompatible with TALAS forks.
• You can check the model year and make of your Fox fork here.

Fox 32, Version C

     …will fit 2016 and newer Fox 32 Float forks with the FIT 4 and Grip dampers. Recommended for 100-130mm 26”, 27.5” and 29″ forks.

FURTHER COMPATIBILITY INFO:

• Not recommended for 80-90mm forks
• Not compatible with 140-150mm forks
• Not compatible with Fox 32mm Step Cast forks

Fox 36, Version D

This new model goes beyond our previous offerings and includes parts
to convert the stock air-spring into an independent positive and negative chamber arrangement similar to the Fulfill™ spring found in our Ribbon and 2017 Stage forks. Once installed, you can now vary the pressures in your two chambers; increasing your negative spring rate to improve small bump sensitivity (a common complaint with the stock spring). This, in addition to the control you have over bottom-out and ending-stroke performance, gives you a radically more sophisticated air-spring that’s incredibly straightforward to tune and adjust!

     …will fit 2015-2017 Fox 36 Float forks with the FIT 4, RC2, and Grip dampers. Recommended for 140-180mm 29”, 27.5+, and 27.5” forks.

Fox 36, Version F

Version F is a cartridge-only kit suitable for 2018 Fox 36 forks of all travel and wheelsize options. A revised air-spring design in Fox’s latest 36 makes the Fulfill™ spring conversion included in Ramp Control Upgrade Version D incompatible. 

    …will fit 2018 and newer Fox 36 Float forks with the FIT 4, RC2, and Grip dampers. Recommended for 140-180mm 29”, 27.5+, and 27.5” forks.

Fox 40, Version E

   …will fit 2016 and newer Fox 40 Float Factory and Performance Elite forks.