XT-class barrel shaft lock ring, made of ultra-light carbon fiber, weighs about 10g.Mainly used for the installation of middle lock hub discs.It can also be used for quick-release type middle lock hub mountain roads.The inner diameter of the two barrel shaft lock rings is about 26mm, and the edge thickness is about 4mm for reference.Brand name: tankeWeight: 8-10gUsage: road bike, mountain bikeModel: tl-891Features: light weightInner diameter: 26mmEdge thickness: 4mmColour: blackMaterial: aluminum alloySize: diameter 43mmPackage Contents:1 * HUB Disc lock coverOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.