Aluminum outer shell for lighter weight Sealed cartridge bearings Star ratchet freehub engagement system on rear hubs RR 8-10s Cass 28H QR Aly Blk 307g 6B 135mm 58 52 33.6 20.3
Aluminum outer shell for lighter weight Sealed cartridge bearings Star ratchet freehub engagement system on rear hubs RR 8-10s Cass 28H QR Aly Blk 275g CL 135mm 46 46 33 20.2