NEW！FBB-742E

Left cup : Steel 1.37" x 24T (BSA)
Right cup : Steel 1.37" x 24T (BSA)
Sleeve : Alloy
Bearing : Sealed bearing 16 x 31 x 10
Nut : M10 x 7.2mm / 12.9 grade
Axle : Square axle Nut Type / Boron steel