I had some broken wheels and a lot of traffic jams. I've tried other inserts and they all didn't work for me. I got a 2" pinch using it downhill but it saved my bike! I take a little walk and change an $80 tire all day instead of buying new wheels. Of course, Enve guarantees everything that takes a little longer than a month without handlebars. When assembling, stretch and lay the tire on one side first, then insert. When installing the other side of the tire, make sure it is fully inserted into the rim! It's a lot easier if you do this. Use their valve stems or something.