When the engineering superpowers of Trek and RockShox combine the results are anything but ordinary. Completely reimagined the Super Deluxe Ultimate ThruShaft was created with a go anywhere ride anything attitude. The ideal match for the next generation of hard hitting all-mountain enduro bikes.Trek's exclusive ThruShaft design responds to changes in terrain faster than any other shock on the marketVersatility is key for a go anywhere do anything attitude. Dial it in with redesigned Low Speed Compression adjustment offering three options to find your perfect match to seize the dayFeaturing an oversized thermal compensator for greater temperature stability and consistent suspension feel on those extra long extra demanding descentsTime to adjust. With a "fully checked" damper your compression settings work independently not to be bothered by each click of ReboundShock controls optimized for frame integration and rider ergonomicsMegNeg air can is not compatible with MY21 Super Deluxe Ultimate ThruShaftOnly compatible with purple tokens for positive and negative air spring tuning