2021 Trek Procaliber 9.5 in Lithium Grey & Trek Black is a lightweight carbon hardtail with the unique advantage of trail-smoothing Iso Speed decoupler. The Iso Speed decoupler & carbon frame makes it ride smoother than any other hardtail, so your body doesn't get beaten up by trail chatter. You get a Straight Shot downtube for extra-stiff, responsive handling without the added weight & a Knock Block headset that protects against spinning bars & fork crowns. It's the most affordable carbon model in the Procaliber mountain bike family. It's built for speed & efficiency on singletrack with a smooth-shifting wide-range Shimano Deore 1x 12 drive train. Rock Shox Judy SL fork with Solo Air spring & a Turn Key lockout, which can easily be adjusted for specific rider weight, & it's lighter than a coil spring powerful Shimano hydraulic disc brakes & fast, tubeless-ready speedy 29" wheels. Features OCLV Mountain Carbon, Iso Speed, tapered head tube, Knock Block, internal control routing frame Rock Shox Judy SL fork with Solo Air spring & a Turn Key lockout Shimano Deore 1x 12 drive train Shimano hydraulic disc brakes Tubeless-ready 29" wheels. This bike is great for You're getting into a carbon race bike at an incredible price This bike is great for You're getting into a carbon race bike at an incredible price. Perfect for riding singletrack or entering XC races. Procaliber 9.5 gives you the advantages of a carbon race bike with Iso Speed at a wallet-friendly price, & it gives you reliable tech where it matters most.