How would 225/40/18 compare against 225/45/17 in snow?

dmichael · 07-11-2007, 03:19 PM

Thinking of getting 225/40/18 tires all around on a 07 328xi, and since the 225/45/17 stock tires have the same 225 width(footprint), I am thinking there would be no noticeable difference in snow, given both sets are all-season.

so would 225/40/18's do
slightly worse - hardly noticable
much worse - get out the 17"
about the same

As long as there are not much worse, I may be able to avoid the winter tire swap thing and even sell off stock 17" to defray cost of 18".
Thanks!

Bimmerista · 07-11-2007, 04:04 PM

As I understand it - no difference.

eltonc · 07-11-2007, 04:47 PM

I have 225 40 18 RFT's all around and the car drove great in the snow. I sold my stock 16" before winter so I don't know if it drove better or worse. I was definitely surprise how well it handled.

calle_enell · 07-11-2007, 05:45 PM

Winter tires benefit from a higher profile on a smaller size rim as well as a narrower width (higher normal preassure due to weight disrtibuted over smaller area) 225/55 R16 or 205/60 R16 would probably be good dimensions for real winter driving on a mix of snow and ice. Check out winter ralley tire dimesions just for fun..

dmichael · 07-19-2007, 09:05 AM

Thanks for your responses!

Can anyone else share their experiences with 225/40/18's in snow with x-drive?

07-11-2007, 03:19 PM	#1
dmichael Lieutenant 25 Rep 452 Posts Drives: 2011 GTI Join Date: Jun 2007 Location: Massachusetts iTrader: (1)	How would 225/40/18 compare against 225/45/17 in snow? Thinking of getting 225/40/18 tires all around on a 07 328xi, and since the 225/45/17 stock tires have the same 225 width(footprint), I am thinking there would be no noticeable difference in snow, given both sets are all-season. so would 225/40/18's do slightly worse - hardly noticable much worse - get out the 17" about the same As long as there are not much worse, I may be able to avoid the winter tire swap thing and even sell off stock 17" to defray cost of 18". Thanks! __________________ 2008 E90 328i - Sparkling Graphite/Terra/Dark Burl, 6MT, Sport, Premuim, Fold-down seats, iPod/USB(6FL). M-Sport Steering Wheel, ZHP M-Sport Shift knob, Euro fog lights. Euro Split Armrest
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07-11-2007, 04:04 PM	#2
Bimmerista Major General 82 Rep 5,732 Posts Drives: superstock Join Date: Aug 2005 Location: Montreal, Quebec, Canada iTrader: (0)	As I understand it - no difference. __________________ __________________________ 2016 435 xdrive GC white on black leather interior, Msport1, Msport2, premium package 2015 Lincoln MKX, silver on brown leather, premium package - that's right! Techno-Groovy baby
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07-11-2007, 04:47 PM	#3
eltonc Enlisted Member 3 Rep 45 Posts Drives: 325XiT Join Date: May 2006 Location: Kansas City iTrader: (1)	I have 225 40 18 RFT's all around and the car drove great in the snow. I sold my stock 16" before winter so I don't know if it drove better or worse. I was definitely surprise how well it handled.
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07-11-2007, 05:45 PM	#4
calle_enell Car keeps stalling out...5 times now. 9 Rep 248 Posts Drives: E90 328i Join Date: Jun 2007 Location: USA iTrader: (0)	Winter tires benefit from a higher profile on a smaller size rim as well as a narrower width (higher normal preassure due to weight disrtibuted over smaller area) 225/55 R16 or 205/60 R16 would probably be good dimensions for real winter driving on a mix of snow and ice. Check out winter ralley tire dimesions just for fun..
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07-19-2007, 09:05 AM	#5
dmichael Lieutenant 25 Rep 452 Posts Drives: 2011 GTI Join Date: Jun 2007 Location: Massachusetts iTrader: (1)	Thanks for your responses! Can anyone else share their experiences with 225/40/18's in snow with x-drive? __________________ 2008 E90 328i - Sparkling Graphite/Terra/Dark Burl, 6MT, Sport, Premuim, Fold-down seats, iPod/USB(6FL). M-Sport Steering Wheel, ZHP M-Sport Shift knob, Euro fog lights. Euro Split Armrest
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