I made the traction bars myself. Yes, the blocks are a little much (9 inches tall!), but I couldn't afford leaf packs at the time. The traction bars are 2"x2" box tube with 1"x1" box tube framing the 1/2" rebar lattice...yes, rebar! The axle end has a rigid bushing while the frame end has an adjustable bushing end and tapped box tube bung both from Ballistic Fabrication.