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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > 18" runflat as a spare



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      10-05-2008, 09:51 AM   #1
RBBMWE46M3
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18" runflat as a spare

So I just went to the tire racks web site and built a set of 17" winter tires and rims and I was wondering...I am not ordering run flats. I have 18" run flats OEM's on the car now ( I cant remember the rim style I have the sport package) anyway, I was planning on using one of the run flats as a spare. Can I put one of the runflats on as a spare that is 18 inch with the 17's and not damage the drivetrain? Or do I have to buy 5 tires? sorry about a noob question...
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      10-05-2008, 10:55 AM   #2
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I don't think you can mix them, but why not get the Continental comfort kit? It is not perfect, but should get you through the most common flat tire issues. I just keep the kit in my trunk and have been fine for the last two winters.
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      10-06-2008, 05:19 AM   #3
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you can use them as spare no problem the diamter is nearly the same so for a short run @ home it will work good
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      10-06-2008, 09:15 AM   #4
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You won't be able to mix them during everyday driving, but in an emergency you should be able to use it. Do what you gotta do to get home!
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      10-06-2008, 10:22 AM   #5
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Correct. As long as the overall diameter is pretty close (which it should be if you're ordering one of our recommended packages) , its okay to use that one as a temporary spare solution.

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