Thanks, I'll try removing the tape and smoothing the edges on the liner to prevent it from cutting the tube instead. I got the liners, because on the last few miles of my ride, the road always has alot of debris - broken glass, nails, rocks, wires... I've always been concerned about it, and finally got a flat earlier this week. I figured that I might as well try out tire liners and see if they work. If they work, great; if not, they were only $14, so not too big of a loss. I've wasted more money on worse ideas.