Features1Easier Cycling: Ensuring smoother cycling and low noise, the high strength bike bottom bracket enables more enjoyable riding. 2Stable Structure: The central shaft with enhanced lateral stability can prevent looseness, thus largely improving the safety. 3 Sealing: sealing performance can better keep the lubricant in the bearing, making the working very stable. 4Great Material: Combining aluminum alloy and ceramic materials, not easy to deform and has great durability for using. 5Easy to Install: Comes with a light weight and a compact size as well, the convenient installation can be quickly completed.SpecificationItem Type: Bike Bottom BracketProduct Material: Aluminum alloy, ceramic. 5 Way Width: Approx. 89.5mm / 3.52in, 92mm / 3.62inRoad Bike Frame 5 Way Width: Approx. 86.5mm / 3.41in, Inner Diameter: Approx. 24mm / 0.94in, Outer Diameter: Approx. 41mm / 1.61inColor: BlackPackage List1 xBike Bottom Bracket1 x Accessory