Audi A4 2009 - ABS and tyre flat spots

Honest John Back Room » Technical matters
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Thu 23 Jun 2011 15:29
Audi A4 2009 - ABS and tyre flat spots - Biri

After recent accident (40mph, slammed brakes on) I noticed a vibration from the rear. It turns out that both rear tyres are flat spotted. Insurance company said its impossible to flat spot tyres with ABS and implied that I'd done it doing a handbrake turn (I'm 46 and drive an Audi A4 TDI for heavens sake!) which blatantly isn't true. Audi also pointed out that you cant handbrake turn this particular model because the of the handbrake configuration. Any help appreciated, I dont want to cough up for new tyres!

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Fri 24 Jun 2011 16:27
Audi A4 2009 - ABS and tyre flat spots - Peter D

I doubt they are flat spotted but the tyre may hve delaminated under the strain. Have one removed and very carefully inspected inside and out. Regards Peter

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Fri 24 Jun 2011 22:57
Audi A4 2009 - ABS and tyre flat spots - Roly93

Very good point. A few years ago I ran over a half brick in the road at speed.

Afterwards I got vibration which I couldn't get rid of after balancing the wheels again. It went when I replaced the tyres so I reckon that the structure of the tyre was damaged by this like you are eluding to.

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Tue 28 Jun 2011 15:55
Audi A4 2009 - ABS and tyre flat spots - Biri

Very good pointer. Thanks for the advice.

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