Retrofitting your Priority Classic 1.0 with a complete Gates Carbon Drive replacement drivetrain is a great way to keep your trusty steed rolling for years to come. Includes a Gates Sidetrack 46T crankset, 22T 3-lobe Surefit rear sprocket, and a 115T Sidetrack belt (matches gear ratio and rear-center dimension of current production Classic and Classic Gotham Edition). Note: Gates drivetrain components are not cross compatible with older C-Drive drivetrain components (i.e. you must replace the entire drivetrain if you would like to complete this upgrade). Requires square taper crank removal tool to complete a full conversion. Please reach out for further detail or engage your local bike shop to complete this repair.