They work better than rubber rim protectors. They can pop out if you start overtightening the mounts (that's why I gave them 4 stars). You can move them along the rim better than rubber protectors. Palstick provides rim protection. I wish I had bought them sooner. I used rubber protectors and the mounts wore out and damaged the surface of the rim before I knew it. They work without damage, which is why I bought them.