This invention generally relates to traction assemblies for use as wheel replacements generally for heavy and/or large vehicles and also to components therefor. The traction assembly generally comprises a sprocket wheel adapted to be mounted to one of the axles of the vehicle, a frame adapted to be pivotally mounted to the vehicle, idlers wheels mounted at the fore and at the aft of the frame and road wheels mounted therebetween and a traction band mounted around the sprocket wheel, the idlers wheels and the road wheels and cooperating therewith for propulsion.