18" runflat as a spare

RBBMWE46M3 · 10-05-2008, 10:51 AM

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...

David 12 · 10-05-2008, 11:55 AM

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.

E91_E88_E21 · 10-06-2008, 06:19 AM

you can use them as spare no problem the diamter is nearly the same so for a short run @ home it will work good

kyleb350 · 10-06-2008, 10:15 AM

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!

Gary@TireRack · 10-06-2008, 11:22 AM

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.

Winter
http://www.tirerack.com/a.jsp?a=AH8&...nter/index.jsp

10-05-2008, 10:51 AM	#1
RBBMWE46M3 blaupunkt 61 Rep 525 Posts Drives: 2008 335xi 6spman montego Join Date: Jan 2006 Location: THE REGION iTrader: (0) Garage List 2008 x5 [0.00] 1972 R75/5 [0.00] 2008 335xi [0.00]	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... __________________ BMW ENGINEERS
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10-05-2008, 11:55 AM	#2
David 12 Major 115 Rep 1,048 Posts Drives: 2019 BMW X5 50i BSM, M Sport Join Date: Jan 2007 Location: Omaha iTrader: (0)	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, 06:19 AM	#3
E91_E88_E21 Major 43 Rep 1,300 Posts Drives: E91 m-sport, E88 m-sport Join Date: Nov 2007 Location: Germany iTrader: (0)	you can use them as spare no problem the diamter is nearly the same so for a short run @ home it will work good __________________ Freude ist BMW E91 SG LCI m-sport,E88 AW m-sport
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10-06-2008, 10:15 AM	#4
kyleb350 Brigadier General 420 Rep 4,709 Posts Drives: '21 X3MC Join Date: Jun 2008 Location: Milwaukee iTrader: (6)	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, 11:22 AM	#5
Gary@TireRack Moderator 372 Rep 4,742 Posts Drives: Formerly 1995 M3 Join Date: Oct 2006 Location: South Bend, IN, Tire Rack HQ iTrader: (2)	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. Winter http://www.tirerack.com/a.jsp?a=AH8&...nter/index.jsp __________________ Gary. Tire and Wheel Forum Moderator. Tire Rack Sales Rep Gary@Tirerack.com http://www.tirerack.com/a.jsp?a=AH8&url=index.jsp Please refer to 'Gary/E90 Post' as your previous contact when you order online to help support this forum.
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