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Old Mar 8th, 2014, 05:01 PM
Theislandman
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United-Kingdom Change from run-flats to normal....strut rub issue

Hi all. I have a 2005 R52 Cooper S Convertible with horrid run flats fitted. It's reaching the time where I need new tyres and I want to put normal tyres on.

The only thing is, I've noticed, and a mechanic noticed that my front tyres only have less than a centimetre clearance from the struts. This means that non run flat tyres may well rub on these struts, as the side walls are thinner, and they bulge out more. The mechanic said that this could cause a blow out.

I did feel the clearance myself, and I couldn't even fit my finger between the tyre wall and the strut. It's only the front wheels though, not the rear. There's plenty of space in the rear wheels.

Has anybody come across this before?

I was thinking that maybe I would fit narrower tyres on the front. There 195 at present, so maybe 190 or 185. Would I still be able to fit 195 on the rear?

I'm definitely not fitting run flats again, as they're bloody uncomfortable, and they cost twice as much......

If anyone has any advice I'd be grateful....

Cheers
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Old Mar 8th, 2014, 05:32 PM
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Full marks to the mechanic for inventing another bull**** reason why non-runflats can't be fitted.

Stiffer sidewalls mean less bulge? That might be true at ground level but why would that be true at spring level?

If the wheels are OEM Mini ones, fit the normal tyre size to them - 195/55-16 presuming you have 16s.
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Old Mar 8th, 2014, 09:18 PM
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Angib is right they wont bulge out any more at the top if you get the same size tyres they will fit the same. I have changed mine from runflats to none runflats mine are 17 inch wheels & I had no problems plus you will love the difference
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Old Mar 8th, 2014, 10:41 PM
Theislandman
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Thanks Angib. Yes I do have 16's. It did make me think actually....why would they bulge at the top????

Cheers heathwebbo.... Can't wait to get rid of the run flats...

I was actually thinking of selling the car, as I need the memory space back in my head..... The memory space taken up by the enormous array of potholes I have stored up there.... It seems I now know the location of every pothole, manhole cover,speed bump, and even road-kill.....in the whole country!!!!
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Old Mar 9th, 2014, 07:51 PM
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Quote: Originally Posted by heathwebbo (original)
Angib is right they wont bulge out any more at the top

Same thing as getting a flat tyre, they only go flat at the bottom, the rest of the tyre is always ok
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Old Mar 9th, 2014, 08:04 PM
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The shocking thing to look out for is the huge difference in tyre width and diameter on the same nominal tyre size from different manufacturers. All these discussions about 1% speedo error are completely pointless when there is a variation in tyre diameter of several %.
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