Box One Quantum Rear Axle Kits spinimages=71 A classic piece that never

A classic piece that never goes out of style

CHEST WIDTH (inches) LENGTH (inches) S 20 ½ 29 M 21 ½ 30 L 23 ½ 31 XL 25 ½ 32 2XL 27 33

you may experience chaindrops and/or chainsuck

Box Two Prime 9 chain delivers exceptional durability and performance

The Box Four Rear Derailleur is the base of Prime 9 Technology that offers an affordable clutch based 1 by 8-speed derailleur that is simple and light

Box One Quantum Rear Axle Kits spinimages=71 A classic piece that neverQuantum Axles are made from hard anodized 7075 T6 aluminum for strength and durability. These axles are designed for use with Quantum rear hubs only and are not compatible with other manufacturers' hubs. The 157mm version works best with traditional Chromoly and aluminum frames, while the 171mm version is designed for carbon frames.