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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Wheels and Tires > "Special" Rims needed to run Run FLat Tires???
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      08-09-2012, 09:18 AM   #1
martinf79
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"Special" Rims needed to run Run FLat Tires???

Question -

I'm considering using my M Sport stock 19 rims for winter setup (staggered)... and getting a new set of 19s for summer. Is there any concern about switching the summer rubber (run flats on my stock rims) to the new 19s (assuming rubber will fit rim size, which I have checked). Is there anything unique to the factory rims that may cause issues on the new 19s???
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      08-09-2012, 08:55 PM   #2
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Quote:
Originally Posted by martinf79 View Post
Question -

I'm considering using my M Sport stock 19 rims for winter setup (staggered)... and getting a new set of 19s for summer. Is there any concern about switching the summer rubber (run flats on my stock rims) to the new 19s (assuming rubber will fit rim size, which I have checked). Is there anything unique to the factory rims that may cause issues on the new 19s???
As long as the shop you are having the work performed at is experienced with low profile tires, you will not have any issues. The primary difference between a runflat is a significantly reinforced sidewall. A thicker sidewall will allow a wheel to run on a flat tire for a longer time without causing significant damage to the wheel itself.
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      08-22-2012, 05:15 PM   #3
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The only time I've seen issues running runflat tires is with cheaper lightweight cast wheels. The reinforced sidewall of a runflat will absorb less impact, thus transferring that impact to the wheel itself making it more susceptible to bends.

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