First gen ProCaliber iso speed cracked; repaired!? | Mountain Bike Reviews Forum
Trek Procaliber 9.5 - 2022 - Simple Bike Store
Trek Bicycle - Smooth means fast. Integrated with the IsoSpeed decoupler and carbon frame, the Procaliber 9.5 rides smoother than any other hardtail, so your body doesn't get beaten up by trail
Trek Smooths Out XC Racing with new IsoSpeed Procaliber SL, and Revamped Top Fuel - Bikerumor