Trek Procaliber Carbon – high-end Gravel setup For sale Trek Procaliber carbon in gravel configuration, with particularly careful assembly and high-end components. Equipment: Trek Procaliber carbon frame Carbon wheels SRAM XX1 drivetrain SRAM Rival AXS brake levers, latest generation FOX Factory 32 fork Hydraulic disc brakes Gravel handlebar Single chainring Versatile road/trail tires The new generation Rival AXS features improved ergonomics and one-finger braking ease. S SRAM +1 A lightweight, responsive, and very versatile setup, ideal for sporty gravel while retaining the qualities of an XC bike.