There are two kind of types
of BB Axle Cottered and cotterless. In our production list
we divide into A, B, C, D four types. Cotterless
B.B Axle for MTB Bicycle also belongs to D type.Material:alxe: steel with ED finishFeature:1.solid and durable2.one piece axle with axle bumper3.finish CP or ED4.fix through washer, nut and
boltSpecifcation:3S, 5S, 3T, 5TOther specification could be order.
