sometimes if the tyre isn't seated properly and there's a gap for the inner tube to force it's way out of it can start wobbling then BANG as it explodes
or if the rim is a bit knackered and you put a bit too much pressure in it can force the tyre off gradually
sometimes if the tyre isn't seated properly and there's a gap for the inner tube to force it's way out of it can start wobbling then BANG as it explodes
or if the rim is a bit knackered and you put a bit too much pressure in it can force the tyre off gradually