Signswise KOOZER Black HA02N/HA04N 72HD Hub CNC Aluminum 2+4 Bearing 32H Front&Rear MTB/Road Axle: F- 9x100mm, R-10x135mm; O.L.D: F-108mm R-145mm CNC Precision Technology Weight: 620g/F+R (include quick release) 6 pawls, 72 clicks per revolution of the freehub