Primato Syntesi Shimano/Sram HG 9/10/11s QR Front And Rear Hub.Technical Specifications:- Weight (g): 425- Drilling: 28 / 32 / 36- Material: Forged AL 6061 T6 / CNC- O.L.D. (mm): 100 - 130- Bearings: MICHE sealed bearings- Transmission: RES 30 Rapid Engagement System- Drilling (on M.O.Q.): 20 / 24- Braking system: Rim- Freewheel body: AL 7075 T6 / CNC- Front axle (mm): 9- Rear axle (mm): 10