Features1The sleeve and the inner bearing are integrated, which can effectively ensure the smooth rotation of the bearing 2Has the characteristics of waterproof and dustproof, and the design of the bearing protection cover design helps prevent the erosion of mud, sand and water 3The bicycle bottom bracket is small in size and light in weight, easy to carry and store, and can meet your riding needs 4Easy to use. The bearing can be applied to your equipment, which is not easy to loosen, and is stable during rotation 5PF30R is suitable for bottom bracket with 46mm inner diameter and 6873mm bottom bracket for road bikesSpecificationItem Type: Bike Bottom BracketProduct Material: 7075 Aluminum AlloyStyle: PF30RApplication: General Purpose for Mountain Bikes and Road BikesApplication: Bottom Bracket Inner Diameter Approx. 46mm/1.8in, Bottom Bracket Specification Approx. 68-73mm/2.7-2.9inPackage List2 x BikeBottomBracket2 x Washer