HUB RR WM MT2000 QR 6B 28x135 8-10sCAS BKForged alloy construction. Loose ball bearing design. External sealing system. 6-Bolt disc. Item Specifications: Material, Aly, Color, Blk, Brake Type, 6B, Use, RR, Hub Drilling, 28H, CTF-R, 19.5, Spacing / Axle, QR, LTF-L, 32, CTF-L, 35.5, LTF-R, 48, PCD-L, 58, Gears, 8-10s Cass, PCD-R, 58, OLD, 135,.