Steve is correct. There is no tube flaw or tube property that makes it more or less likely to blow a tire off the rim. It is completely the job of the tire to hold the tube in. Think about tubeless. The only job for the tube is to be airtight. Blowing the tire off the rim means one of three things
1. Over inflation. In my opinion 69psi is insanely high for a 50mm wide tire. I'd think 30 would be about the highest I'd go at that width. Did you go to 60 in the cold garage because that's the max and then carry it to your warm house? Do you trust your gauge. My floorpump gauge understates pressure by about 20 psi. If I used my floorpump to pump a tire to 60 on its gauge and then took it inside, in about 30 minutes it would really be 90psi. 2. The rim/tire interface failed because of some flaw. I've seen the rim tape shifted up into the rim hook. I've seen mold errors where the tire bead is flattened. An undersized rim or oversized tire would also contribute ( but not in this case) 3. Installation flaws. Bill Lindsay El Cerrito CA -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
