[SAF60] - Classical MTB XC with Disc aluminum hub - AL6061/T6 aluminum body CNC manufacture - New design sealed bearing cap structure - Propeller tight 2 sealed bearing - O.L.D.:100mm Weight : 170 g - Spoke:20,24,28,32,36 Hole [RAR60] - Classical MTB XC with Disc aluminum hub - AL6061/T6 aluminum body CNC manufacture - Patented design O cricoid spring structure - Forged cassette body the stronger loading - Propeller tight 4 sealed bearing - O.L.D.:132mm Weight : 284 g - Spoke:20,24,28,32,36 Hole.