At 8.4″ tall, the Sledgehammer’s increased diameter gives your X-Maxx^® a more powerful stance with even higher ground clearance. The tires' open block tread design clears mud and debris for unmatched traction in loose surfaces. Sledgehammer tires come pre-mounted to massive 6-spoke X-Maxx wheels with an ultra-tough 8s-rated glue bead for the most extreme high-speed off-road action. Fits 24 mm splined hex, front or rear.