Shane Weston SignatureAxle type: 3/8"x24tpi cr-mo female boltsMaterial: 6061-T6 aluminum hub shellBearings: fully sealed3/8"" female bolts with 17mm wrench flats and 6mm allen key,lightweight design,strong low flange hub,allen key inner axle for easy maintenanceWeight (kg): 0.283Color: black, blue, high polished