Model 2 HD Axle with Solid hub on engine side and single speed freewheel on pedal side Has 48T sprocket and drum brake for a 3 brake system. Model #2. FOR 2 CYCLE ENGINES: Sealed Double ball bearing axel hub: Includes solid non-freewheel flange to mount engine driven wheel sprocket so engine can be pedal started. Use 48T Chain wheel sprocket direct attachment. Includes drum brake and hardware. Freewheel not included. Hub is needs to be laced by a bicycle shop. Can hold spokes up to 12 gauge, 36 spoke 26" rims.