Last night after putting a new ( stored for 4 years ) tube in an old but good tire, as I usually do, I pumped it up to max tire psi of 115 before lowering it back to where I usually ride, 100 psi. Well, just as I reached 115 psi, the tire exploded. No problem, except my hearing in one ear 11 hours later is not particularly good. Sure hope it returns to normal. The only thing I can think of is that the tire was not seated properly on the rim, and let go for that reason...