225 45 18 Dunlop Wintersports

ktan · 11-17-2009, 08:40 AM

I just bought my wife a 328xi coupe here in frigid MN and my brother has an extra set of Dunlop Wintersport M3's i can have. 225 45/18

I checked the tire calculator and it looks like there is a 1" total difference in height. (1/2" on either side)

Should I consider buying a set of 18 winter wheels for these tires just forget about the free tires??

thanks
Kevin

BMdblU · 11-17-2009, 09:03 AM

Yes you need 225 40 18

Derek Zoolander · 11-17-2009, 11:01 AM

http://www.miata.net/garage/tirecalc.html

Your speedo will read 2mph slower.
You don't need 225/40s, but that would be the right size.

Gary@TireRack · 11-17-2009, 12:34 PM

You can use either 225/40R18 or 235/40R18 on all four corners for winter use with no problem. 225/45R18 is a bit tall and may rub after snow is packed into the tires.

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

6Zylinder · 11-18-2009, 11:51 PM

Quote:

Originally Posted by ktan

I just bought my wife a 328xi coupe here in frigid MN and my brother has an extra set of Dunlop Wintersport M3's i can have. 225 45/18

I checked the tire calculator and it looks like there is a 1" total difference in height. (1/2" on either side)

Should I consider buying a set of 18 winter wheels for these tires just forget about the free tires??

thanks
Kevin

Use the set from your brother and buy cheap 18" rims. You can't get it cheaper than that. Don't worry the bigger tire, it will work fine.

11-17-2009, 08:40 AM	#1
ktan Private 1 Rep 53 Posts Drives: 2006 M5 Join Date: Dec 2008 Location: Minneapolis / Kuala Lumpur iTrader: (0)	225 45 18 Dunlop Wintersports I just bought my wife a 328xi coupe here in frigid MN and my brother has an extra set of Dunlop Wintersport M3's i can have. 225 45/18 I checked the tire calculator and it looks like there is a 1" total difference in height. (1/2" on either side) Should I consider buying a set of 18 winter wheels for these tires just forget about the free tires?? thanks Kevin
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11-17-2009, 09:03 AM	#2
BMdblU Brigadier General 152 Rep 3,983 Posts Drives: F80 Join Date: Oct 2007 Location: Toronto iTrader: (2)	Yes you need 225 40 18
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11-17-2009, 11:01 AM	#3
Derek Zoolander Banned 90 Rep 1,873 Posts Drives: 09 E90 M-Sport Join Date: Aug 2009 Location: Nashua, NH iTrader: (0)	http://www.miata.net/garage/tirecalc.html Your speedo will read 2mph slower. You don't need 225/40s, but that would be the right size.
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11-17-2009, 12:34 PM	#4
Gary@TireRack Moderator 369 Rep 4,745 Posts Drives: Formerly 1995 M3 Join Date: Oct 2006 Location: South Bend, IN, Tire Rack HQ iTrader: (2)	You can use either 225/40R18 or 235/40R18 on all four corners for winter use with no problem. 225/45R18 is a bit tall and may rub after snow is packed into the tires. 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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