I have used this tool to pop the beads on some tires I had on 16" aluminum rims and also the beads on some BFG KM3 37" mud tires that were on 17" steel rims were installed. The long arm that came with the kit worked best with the aluminum rims and the short arm worked best with the steel rims I had. It worked wonderfully! I love that it's so small and easy to pack. I plan to take this with us when we take the jeep around the trails just in case we need to blow a tire to patch it. You never know.