Installing Tuffy liners by rubber cementing them into place and duct taping the overlap seam. The rubber cement will make sure that they stay centered and will cause the Tuffy to stretch out into a shape that will stay in place even after the cement looses it's holding property. I have them on my road, utility, and cross bike and haven't had a flat for a very long time. Make sure you get the right size for your tire by comparing them side by side if you decide to get them. Also with liners on they make a good added cushion effect to a flat especially when bombing down a hill at 40mph; I know first hand. And besides I dislike buying countless replacement tubes and patches, trust me.