Originally Posted by supcom
The pressure rises in proportion to the temperature rise, in Kelvin. So, if you aired up your tires at room temperature (25C or 298K) then put the bike where the temperature got to 110 deg (43C or 316K), the rise in pressure is 316/298=1.06 times the original pressure. For a 100 PSI tire, you get only 6 psi added pressure.
Assuming you have healthy tires and tubes, you would need a much higher temp rise to cause a blowout. If you have some sort of defect in either, then anything is possible.
This sounds right to me. MKRG and Sohi pinned it. If you hear a bang then the tube has already exited the tire/rim envolope. Over pressurizing the tube (air on the inside, intact tire on the outside) isn't going to rupture anything. We routinely place inner tubes in a 10,000psi environment on the job and they just get stronger (while at pressure that is).
Assuming the tire has no cuts or the tube has been in place for awhile (so it's not the situation MKRG described) then the only thing that comes to mind is that the tire is a poor fit for the rim, with the small pressure increase being enough to unseat the tire from the bead seat. Curiously, what tire and rim combo do you have?
Jim