HUB RR WM AB2000 BO SF 1sFW 28x110 BK Alloy hub shell with bolt on axle. Loose ball bearings. Small flange. Item Specifications: Material: Aly, Color: Black, Bearing Type: Loose Ball, Brake Type: RIM, Use: RR, Hub Drilling: 28H, CTF-R: 25, Spacing / Axle: B/O, LTF-L: 27, CTF-L: 28, LTF-R: 30, PCD-L: 45, Gears: 1s FW, PCD-R: 45, OLD: 110,