"Special" Rims needed to run Run FLat Tires???

martinf79 · 08-09-2012, 09:18 AM

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???

tiltmode43 · 08-09-2012, 08:55 PM

Quote:

Originally Posted by martinf79

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.

scott@bmwhn · 08-22-2012, 05:15 PM

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.

-Scott

08-09-2012, 09:18 AM	#1
martinf79 Captain 191 Rep 802 Posts Drives: 2020 G05 X5 M50i Join Date: May 2012 Location: Toronto, Canada iTrader: (0)	"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??? __________________ 2020 X5 M50i \| 2015 X3 28i xLine \| Retired 2013 335i M Sport
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08-22-2012, 05:15 PM	#3
scott@bmwhn Major 132 Rep 1,245 Posts Drives: Msport X3 Join Date: Mar 2008 Location: Houston iTrader: (3)	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. -Scott __________________ 03' 525iT stick, 22' 530i Previous: 20' X3 M40i, 19' 740i Msport, 17' 430i GC, 15' Msport X3 28i, 15' Sportline X1 28i, 13' Msport 328i, 09' Msport 335i, 07' Msport 335i Last edited by scott@bmwhn; 08-22-2012 at 05:27 PM..
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