Box One Quantum Rear Axle Kits spinimages=71 Made of 7075-T6 aluminum

Made of 7075-T6 aluminum

Weight Limit: 115kg (253 lbs) with limitations as per Category 2 of EN 16054:2012 Standard

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

A classic piece that never goes out of style

The head of the quick-release lever and the face of the clamp are given a proprietary zero friction” surface treatment that ensures smooth lever action for the life of the clamp without the need for a bushing

Box One Quantum Rear Axle Kits spinimages=71 Made of 7075-T6 aluminumQuantum 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.