Today i drove to uni, the car was fine all the way, felt no wierd feedback coming thru the wheel t indicate anything at all wrong with the tyres....i ran over nothing either.

I come out of uni after being there for 5 hours...reverse out the park and i can feel the front tyre is flat...really flat. i reversed no more than 2 metres and the tyre was almost off the rim....

Now i have never had a flat tyre before so i dont know if this i a common thing? I thought a flat was just a let down tyre but if it wasnt too bad you could possibly drive on it.


anyway i changed tyres - is there anything i should do? Is there anyway the tyre could have slipped off the rim?

Pretty much impossible for a tyre to slip off the rim - they can get torn off at extremely high cornering load though. As in, overloaded and pulling 1g lateral acceleration.

Take the flat to Beurepaires or something and ask them to check it to see if it can be repaired or if it's a writeoff - they'll find what's likely embedded in it.

probably a nail or screw or other small hard object, not rare and you'll hardly ever notice running over them.

No chance someone slashed it is there?

If it's nothing obvious like a nail or something through the tread, the next stop is a loose valve core. These little blighters can loosen with time or if not tightened properly when tyre fitters put your tyres on. The red hot tip is to carry a valve core tool (small bucks at your accessory store) and just check the core tightness whenever you check tyre pressures.

Cheers for the replies guys!!

MitchellO - As far as i could see there wasnt any marks on the tyre wall or anything, there wasnt anything in the tread as far as i could see either..

im really stumped to what it was - You're probabaly right Dalahare, probabaly caught a nail or something without noticing and went down while i was at uni, but im still stumped to why it wasnt attached to the rim.

also the valve stem itself can preish when it gets old and cause it to leak air. the reason your tyre came off the bead was most probably because you turned on it, even the smallest ammount of movement on a flat tyre will cause it to come off the rim unless you are driving perfectly straight.

i had a flat a month or so ago, pumped em up before we went out for a night got to the pub and found it was flat...
turned out to be a defective valve. Crap as

yeah ive had this a few times. sounds like a nail, they arent always obvious

most tyre places repair nail/screw punctures for around $30