It features a Shimano drivetrain with SRAM cassette, Avid Elixir R Carbon hydraulic disc brakes and uses various other parts from Bontrager, such as the saddle, handle bars, wheels and FR-4 26 x 2.35" tires. The Trek Scratch Air 8 has an Alpha Red Aluminum frame with ABP, Full Floater, alloy EVO Link, E2 tapered head tube, oversized pivot bearings, ISCG03 mounts, 142x12mm or 135x12mm rear axle, replaceable derailleur hanger, adjustable geometry and comes in sizes from 15.5" to 21.5" in a Matte Titanium finish. It also includes frame adapters to use a 135mm wheel.
