With this part installed on your forks, there is no more need to tinker around with bottomless tokens or spacers to find the right travel progression. This means you can quickly tweak the fork’s volume control on the go, which is ideal if you’re out on an all-day session on different types of trails. Being able to tune both the air pressure and the damper settings enable you to prevent bottom-out and to isolate big hits. Compatibility: Fox Model C: Fox 32 2016 with FIT4/Grip Dampers 80-130mm 26"/27.5"/29". Not recommended for 80-90mm forks. NOT COMPATIBLE WITH 140-150mm FORKS. NOT COMPATIBLE WITH FOX 32 STEP CAST FORKS. RockShox Model C: RockShox Pike Short Travel 2013-2016 15x100 (Non-Boost). Solo Air models only. Recommended 120mm 27.5" 120mm/130mm 29".