Model: MT065F/R Material: Aluminum Alloy AL6061-T6+AL7075 O.L.D: Front 15x110mm; Rear 12x148mm Bearings: Front 2 Bearings; Rear 4 Bearings Weight: Front 160g; Rear 290g FLD: About 58mm Structure: 36T/54T Ratchet Freehub body: HG 8 9 10 11 SPEED/ MS 12 SPEED/ SRAM XD 12 SPEED Use for: Mountian Bike