JetSet Posted April 9, 2011 Share Posted April 9, 2011 Well, with it being such a nice day I dropped the roof on Caroline's roadster and made an excuse to nip down to the shops. On the way back, travelling at about 65 I heard a muffled bang and the steering turned really heavy. Stopped straight away and could see that the front drivers side tyre was completely flat. Took the wheel up to the local tyre fitter and after he had inflated it searched for punctures and thoroughly inspected the tyre wall the tyre stayed fully inflated. The valve is O.K and there's no sign of any damage to the wheel rim or tyre wall . It would seem that some reason the tyre deflated but doesn't have any sort of puncture or wheel damage . Very strange Pete Quote Link to comment Share on other sites More sharing options...
Zugara Posted April 9, 2011 Share Posted April 9, 2011 How strange....... Quote Link to comment Share on other sites More sharing options...
Ricey Posted April 9, 2011 Share Posted April 9, 2011 He's missed something there Pete - you don't get a bang and instant deflation without some sort of blow out. Has it held air since? Quote Link to comment Share on other sites More sharing options...
glrnet Posted April 9, 2011 Share Posted April 9, 2011 Happened to me once on the old Audi A4, hit a bump in the road, not a pothole but I guess that could have the same effect, the tyre guy said if the tyre wall is compressed suddenly then the seal with the rim can break for a nano second and hence the bang Reinflated and never had a problem again so I guess he could've been right. Quote Link to comment Share on other sites More sharing options...
JetSet Posted April 9, 2011 Author Share Posted April 9, 2011 Happened to me once on the old Audi A4, hit a bump in the road, not a pothole but I guess that could have the same effect, the tyre guy said if the tyre wall is compressed suddenly then the seal with the rim can break for a nano second and hence the bang Reinflated and never had a problem again so I guess he could've been right. Ah ha, yeah, I did feel a slight bump at the same time come to think about it. I guess that's it then, tyre has remained inflated since, thanks for the info . Pete Quote Link to comment Share on other sites More sharing options...
Ricey Posted April 9, 2011 Share Posted April 9, 2011 You must of done well not to loose control at that speed too Pete - pretty scary that a tyre can just spontainiously deflate when it hit a bump! Quote Link to comment Share on other sites More sharing options...
glrnet Posted April 9, 2011 Share Posted April 9, 2011 No probs mate Happened to me once on the old Audi A4, hit a bump in the road, not a pothole but I guess that could have the same effect, the tyre guy said if the tyre wall is compressed suddenly then the seal with the rim can break for a nano second and hence the bang Reinflated and never had a problem again so I guess he could've been right. Ah ha, yeah, I did feel a slight bump at the same time come to think about it. I guess that's it then, tyre has remained inflated since, thanks for the info . Pete Quote Link to comment Share on other sites More sharing options...
Will370z Posted April 9, 2011 Share Posted April 9, 2011 Must have given you a scare, glad it's not going to be at Problem though. Quote Link to comment Share on other sites More sharing options...
Sam Mcgoo Posted April 9, 2011 Share Posted April 9, 2011 Even though all seems well, I would have a close look at the tyre from time to time just to make sure you don't get any bulges in the side walls come up. An impact like that can de-laminate the layers of rubber and air can slowly pass through the inner layers causing it to balloon on the outside. Quote Link to comment Share on other sites More sharing options...
JetSet Posted April 10, 2011 Author Share Posted April 10, 2011 Funny thing was it wasn't scary at all, the steering just became a bit heavy. Looking at the tyre it wasn't flat to to the ground like a normal puncture (pressure was still 4.0). I'm pretty sure its not a run flat tyre but it acted just like one . If nothing else, NanKang make bloody rigid tyre walls . I'll keep a close eye on it from now on, the tyre technician who looked at it said both the inner and outer walls were undamaged and the rims didn't have a mark on them. I did have a blowout in Colorado, 2007 and that was a real heart stopping moment, tyre just disintegrated . Pete Quote Link to comment Share on other sites More sharing options...
JetSet Posted April 10, 2011 Author Share Posted April 10, 2011 You must of done well not to loose control at that speed too Pete - pretty scary that a tyre can just spontainiously deflate when it hit a bump! Been driving for aeons and have gone down cavernous pot holes, hit boulders, rocks and all sorts of things without ever encountering this. No idea what I hit, it was certainly no bigger than a large stone. Pete Quote Link to comment Share on other sites More sharing options...
Chris`I Posted April 10, 2011 Share Posted April 10, 2011 Most likely cause is an impact on a square edge (pothole). This could, as already been said, cause the rim seal to break and cause a loud bang, deflate, but then reseal and leave some pressure in the tyre. However you should be able to see some damage to the sidewall. May not be obvious as it may be on the inner edge, but the tyre guy should have spotted it. I'd keep an eye on it as advised, make sure you feel around the inner side now and again to make sure it doesnt buldge. Sounds like you've been lucky Quote Link to comment Share on other sites More sharing options...
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