Paul Components High Flange rear track hubs are machined from three inch round bars of 6061 aluminum. The hub shells are put through four different machining proccesses before finishing. Includes super duty stainless steel lockring.ACS Crossfire freewheels will not fit on Paul Component Engineering hubsPlease note that radial lacing voids the manufacturer"s warrantyCNC-machined with high flange bodySealed bearing with bolt on axleRear is threaded for freewheel on one side and threaded for track on the other; lockring includedItem SpecificationsColorBlackWeight351gIntended UseTrackHub Drilling32spokesRear Axle Type3/8" bolt onCassette Body TypeThreaded, StandardHub/Brake CompatibilityRim BrakeRear Wheel TypeTrackRear Hub Spacing120mmSkewer IncludedNA, Bolt-OnDefined ColorBlack