Not using OEM tire sizes

Dr. G · 12-08-2010, 05:10 PM

I know that 225/40/18 all around is more popular for winter, but the ws-70 aren't available in this size on tirerack only ws-60.

I was thinking of going with 225/45/18 this way I can get the newer. blizzak ws-70's.

Now I have three quick questions regarding this change:

1) Would my speedometer now read slightly more accurate then before? Its reads about 63mph when I'm going 60 mph, so would that gap be reduced now?

2) What effect does this change have on the cars odometer?

3) Is there a 3rd tire size I could consider in which I might find some tires other then the ws-60 that I may like?

Mr. ///M3 RD · 12-08-2010, 05:42 PM

Re: 1 & 2 ... just plug your numbers (original tires and new) into the table above. It will give you the answer.

Re: 3 ... I am sure one of the Tire Reps here will help you out.

Dr. G · 12-08-2010, 06:30 PM

Yeah i plugged it in it says @ 60 my speedo will read 62... but when i searched up a couple threads on the topic people said the opposite effect would happen so I'm a bit confused.

///M3NACE · 12-08-2010, 06:35 PM

go with oem tire sizes always 255 35 18

remmib · 12-09-2010, 12:00 PM

Quote:

Originally Posted by Dr. G

Yeah i plugged it in it says @ 60 my speedo will read 62... but when i searched up a couple threads on the topic people said the opposite effect would happen so I'm a bit confused.

Yeah, I think the opposite is correct. When you get bigger wheels the speedo will read less than the actual speed, because the wheel rotates less, but goes longer on each rotation.

Gary@TireRack · 12-09-2010, 01:00 PM

In the two recommended sizes of 225/40R18 and 235/40R18 there is not yet a WS70. However Michelin makes the nearest comparable tire, the Xice Xi2 in 225/40R18.

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

Mr. ///M3 RD · 12-09-2010, 01:25 PM

Quote:

Originally Posted by Gary@TireRack

In the two recommended sizes of 225/40R18 and 235/40R18 there is not yet a WS70. However Michelin makes the nearest comparable tire, the Xice Xi2 in 225/40R18.

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

+1 That is why why I got that as my winter set

12-08-2010, 05:10 PM	#1
Dr. G Major General 278 Rep 5,062 Posts Drives: Black e92 335i Join Date: Apr 2010 Location: Brampton, Ontario iTrader: (32) Garage List e92 BMW 335i [8.84]	Not using OEM tire sizes - quick questions I know that 225/40/18 all around is more popular for winter, but the ws-70 aren't available in this size on tirerack only ws-60. I was thinking of going with 225/45/18 this way I can get the newer. blizzak ws-70's. Now I have three quick questions regarding this change: 1) Would my speedometer now read slightly more accurate then before? Its reads about 63mph when I'm going 60 mph, so would that gap be reduced now? 2) What effect does this change have on the cars odometer? 3) Is there a 3rd tire size I could consider in which I might find some tires other then the ws-60 that I may like? __________________ JB4 / OSS Angel Eyes / Downpipes / F1-Racewerks FMIC / Custom Meth Kit / BMS DCI / ER Chargepipe / HKS BOV / BMS Meth Elbow / BMW Performance Exhaust / Carbon Fiber Inlay Quad Tips / 19" Miro 111 / Front Aero Lip / M3 Sides / VRS CSL Trunk / Mtech Rear / DD CF Quad Finned Diffuser / LCI Tails / BBK / Smoked Reflectors / F1 Euphoria LED Interior / License LED's / GT 5000k Corners / 5000k HID Fogs / Air Scoops / LED Turn Signals / FK Silverline Coilovers / HPA endlinks / Vibrant Resonators / Osram CBI 5000k D1S
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12-08-2010, 05:42 PM	#2
Mr. ///M3 RD Happy Camper 613 Rep 7,869 Posts Drives: C63 AMG & 280 SL on Weekends : Join Date: May 2010 Location: GTA, Ontario - Canada iTrader: (0) Garage List 1969 Restored Merce ... [7.50] 2011 M3 Coupe TRADED [7.34] 1987 BMW 535is [1.00] Cars from the Past [6.50] The ///M3 Engine S65 [9.59]	Re: 1 & 2 ... just plug your numbers (original tires and new) into the table above. It will give you the answer. Re: 3 ... I am sure one of the Tire Reps here will help you out. __________________ Cheers, Rolf-Dieter Life will take us to some interesting places, fortunately The ///M3 will too with a many of us know this very well, now my C6.3 AMG with 487 HP does it too ---> Click here for some good stuff I found
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12-08-2010, 06:30 PM	#3
Dr. G Major General 278 Rep 5,062 Posts Drives: Black e92 335i Join Date: Apr 2010 Location: Brampton, Ontario iTrader: (32) Garage List e92 BMW 335i [8.84]	Yeah i plugged it in it says @ 60 my speedo will read 62... but when i searched up a couple threads on the topic people said the opposite effect would happen so I'm a bit confused. __________________ JB4 / OSS Angel Eyes / Downpipes / F1-Racewerks FMIC / Custom Meth Kit / BMS DCI / ER Chargepipe / HKS BOV / BMS Meth Elbow / BMW Performance Exhaust / Carbon Fiber Inlay Quad Tips / 19" Miro 111 / Front Aero Lip / M3 Sides / VRS CSL Trunk / Mtech Rear / DD CF Quad Finned Diffuser / LCI Tails / BBK / Smoked Reflectors / F1 Euphoria LED Interior / License LED's / GT 5000k Corners / 5000k HID Fogs / Air Scoops / LED Turn Signals / FK Silverline Coilovers / HPA endlinks / Vibrant Resonators / Osram CBI 5000k D1S
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12-08-2010, 06:35 PM	#4
///M3NACE Banned 168 Rep 3,900 Posts Drives: E36 M3, E36 Vert , E90 N52 Join Date: Oct 2006 Location: Downers Grove, IL iTrader: (5)	go with oem tire sizes always 255 35 18
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12-09-2010, 01:00 PM	#6
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)	In the two recommended sizes of 225/40R18 and 235/40R18 there is not yet a WS70. However Michelin makes the nearest comparable tire, the Xice Xi2 in 225/40R18. 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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