* Trek’s exclusive ThruShaft design responds to changes in terrain faster than any other shock on the market* Setting up your Rebound made simple with numerically indicated adjustments to eliminate the number crunching.* MegNeg air can is not compatible with MY21 Super Deluxe Ultimate ThruShaft.* Only compatible with purple tokens for positive and negative air spring tuning* SRAM Model ID: RS-SDLX-THRU-C1