Upon receiving this set qty (4) 8“ steel carbide wheels for the rausch l135 system, I was impressed by the quality and durability of the wheels. These wheels have great traction driving in clay pipe, pvc, and concrete. Just having these wheels on our truck has increased the productivity for the company that I work for because we are able to get through pipe faster that would typically be a challenge to drive the tractor through. Also, the gentlemen that we talked to when we ordered the wheels was really professional, resourceful, and helpful. He also assisted us in pulling the order of our wheels right away to ensure a speedy delivery for us. Highly recommendable product and service! Try them out and you will be satisfied!