TTX18 damper's 18mm piston provides optimal small bump sensitivity 15 clicks of low speed compression and low speed rebound 5 clicks of highspeed compression Twin piston, three chamber air spring system, isolated from the upper tubes to reduced head build up Total Tune Spring Curve System (TTSC) allowing total air spring tuning from the initial movement through to the bottom out 74mm postmount disc brake mount 20x110mm DH Boost thruaxle Max tire size: 29x2.8" or 27.5x3.0" EBike approved (CROWN NOT INCLUDED)