while waiting for my new tubes to arrive i figured i'd mount the new tires with the old tube to see how it go's , i guess i didn't use enough air or the tire wasn't all the way up into the casing cause i pinched it. i going to be supper careful with the new one. i'm getting a weighted plastic mallet to knock the last 6" of bead over the rim instead of prying it. i got the first bead over with just my hands so second one should go with a few taps with the mallet. no more prying i can tell you that!! oh yeah just so you know most baby powder is corn starch. you can get j&j baby powder original formula that's asbestos free real talc that can be used on the tubes.