1. HIGH QUALITY MATERIAL: Bicycle bearing bottom bracket bottom bracket adapter ring is made of high quality aluminium alloy, high strength, rust-proof, wear-resistant and durable and long service life. 2. Three-dimensional design: Token GXP bottom inner diameter: 22 mm, outer diameter: 24mm You can adjust the inner diameter of the lower bracket to fit the bottom bracket on the crank. 3. Wide range of applications: Bottom bracket cups road bike suitable for all types of brands. Can effectively loosen or repair your bike. 4. Appearance and colour: Bike BB adapter is only silver, the appearance is a cylindrical shape. Very small, it can also be used as a decoration.