ACS Single-Speed FreewheelsDurable cold forged CNC machined freeweheel3 pawl ingagement for stronger hold with engagement every 12 degreeesNew removal notch pattern allows for better frame clearanceItem SpecificationsColorGun MetalIntended UseBMXCassette Body TypeThreaded, MetricFreewheel Teeth13teethFreewheel ThreadMetricChain Compatibility3/32"