Fox

MY27 40 Grip X2 Cartridge, HSR/LSR/HSC/LSC

Fox MY27 40 GRIP X2 Cartridge is a sealed cartridge damper upgrade built for riders who want more control and finer tuning from a FOX 40 gravity fork without changing the chassis.

Based on FOX’s next-generation cartridge FIT architecture (stock damper on 2021 forks), it delivers true 4-way damping adjustment—separating high- and low-speed circuits for both compression and rebound—so the fork can be set up to track small chatter while staying composed on hard landings and high-speed impacts.

Dial-in advantages for downhill and bike-park setups

1. 4-way external adjustment (HSR/LSR/HSC/LSC) - Independently tunes support and recovery speed for small-bump traction, mid-stroke control, and big-hit stability
2. VVC high-speed rebound circuit - Expands high-speed rebound tuning range for better composure after sharp hits and successive impacts
3. High-performance mid-valve - Adds controlled support through the stroke to reduce wallow and maintain front-end precision in steep or high-load sections
4. Friction-reducing treatments - Helps the damper respond more consistently to rapid terrain changes and repeated compressions
5. Plug-and-play compatibility - Fits 2015–current FOX forks using GRIP FIT, FIT4, or RC2 dampers for 27.5" or 29" wheel setups