Lightweight, low profile solution for mountain, commuting and fitness bikes Hand-welded 10.2mm tubular 6061-T6 alloy construction Ultra-narrow profile improves aerodynamics, keeps loads closer to center and greatly reduces bag `swing` Mounts to rear caliper bolt or frame and quick release axle skewer eliminating the need for braze ons Ample space for MTB and Hybrid/Trekking fenders Rear Axle/Brake Black 29` Disc 700c/29` DiscUPC/EAN/GTIN: 058817100406