... RatioPCD hole of Wheeel hubInput installationwheel distancebrake drumMotor installed on axle directly,light weight,low power consumption,looks good,and safety ... .45, 10.26, 8.75PCD(100,101.6,114.3),bolt(M12×1.25)involute spline shaft:m=1.0583, α=45 ... brake drum,hydraulic D220 brake 5kw electric vehicle rear dana axle