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Tire Rack's Tires, Wheels, Brakes & Suspension
Discuss everything about wheels, tires, suspension and brakes for your BMW.

Sponsored by The Tirerack. Moderated by Gary@Tirerack.com

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  #1  
Old 11-08-2012, 09:38 PM
z168 z168 is offline
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Location: Cali
 
Join Date: Sep 2006
Posts: 349
Mein Auto: 01 540i/6
going with 225 from a 235

On a '01 E39 540, with stock tires of 235/45/17 on a 17x8, switched to 18s with 18x8 fronts

will it be a problem to switch to narrower 225/40/18? its less than 4% difference so ABS shouldnt be affected.
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  #2  
Old 11-09-2012, 07:47 AM
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Gary@Tirerack Gary@Tirerack is offline
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Location: South Bend, IN
 
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Mein Auto: 1995 BMW M3
Be careful with the load rating. Many tires in 225/40R18 do not carry the approx 1350lbs per tire that is the recommended minimum from BMW.
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Old 11-09-2012, 06:32 PM
z168 z168 is offline
Officially Welcomed to the 'Fest
Location: Cali
 
Join Date: Sep 2006
Posts: 349
Mein Auto: 01 540i/6
Perfect person to respond! I was looking at getting it from TireRack.

I was looking at Continental ContiProContact - 225/40/18.
Serv. Desc: 92H
Load Range: XL
UTQG: 500 AA A



My rears are the same but with 265/35/18 thats why i wanted to get ^ Would this be ok?
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  #4  
Old 11-10-2012, 06:11 AM
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Gary@Tirerack Gary@Tirerack is offline
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Location: South Bend, IN
 
Join Date: Jun 2003
Posts: 4,118
Mein Auto: 1995 BMW M3
Overall diameters are too far off and could cause issues with ABS and traction control. Stick with 235/40R18 or 245/40R18 when using with 265/35R18.

Tires http://www.tirerack.com/a.jsp?a=AB2&...ires/index.jsp
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