OMG, the worst possible combo EVER. My newly acquired Tesch, has Wolber TX Profil rims. I have folding Continental Ultra Sports on it. IMPOSSIBLE to get the tire on, and I pinch flattened the tube several times just getting it mounted. I thought I had it done, and it was still flat the next morning. On my first test ride I made it almost all the way back home. In the last 75 feet before my driveway I heard a recurring rub noise, followed by loud POPfisssssssshhhhh. I thought the bead came loose, but was still mounted when I came to a stop. I guess it's back to the LBS tomorrow night for another tube and a new rim strip.,,,,BD