Tire fit and sizing guide

JTTrubs · 01-14-2011, 05:23 PM

Is there a good reference for understanding what tires fit with the different body types? Or maybe understanding sizing/staggering in general?

I am looking to pick up a set of wheels that are 255/45/18, but am afraid the front might be too large. I currently have the sport package on an '06 330i with 225/40/18 and 255/35/18. Any thoughts?

remmib · 01-14-2011, 05:33 PM

255/45/18 is too tall. The 45 means that the side wall is 45% of the width, which is 255mm.

255x0.35=89.25mm
255x0.45=114,75mm

And this means that the 255/45/18 tires are two inch taller than the OEM 255/35/18.

JTTrubs · 01-14-2011, 05:50 PM

Quote:

Originally Posted by remmib

255/45/18 is too tall. The 45 means that the side wall is 45% of the width, which is 255mm.

255x0.35=89.25mm
255x0.45=114,75mm

And this means that the 255/45/18 tires are two inch taller than the OEM 255/35/18.

Thanks!

VMRWheels · 01-14-2011, 06:18 PM

Ditto, you'll want to look into a 255/35/18 for the proper diameter tire.

-Charles@VMRWheels

Gary@TireRack · 01-17-2011, 09:20 AM

225/40R18 or 235/40R18 for the front. Rears can be those sizes or 255/35R18.

01-14-2011, 05:23 PM	#1
JTTrubs New Member 0 Rep 11 Posts Drives: 2006 BMW 330i Join Date: Dec 2010 Location: Chicago, IL iTrader: (0)	Tire fit and sizing guide Is there a good reference for understanding what tires fit with the different body types? Or maybe understanding sizing/staggering in general? I am looking to pick up a set of wheels that are 255/45/18, but am afraid the front might be too large. I currently have the sport package on an '06 330i with 225/40/18 and 255/35/18. Any thoughts?
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01-14-2011, 05:33 PM	#2
remmib General 1579 Rep 29,212 Posts Drives: 2013 F10 520d M-Sport Join Date: Feb 2006 Location: Norway iTrader: (0)	255/45/18 is too tall. The 45 means that the side wall is 45% of the width, which is 255mm. 255x0.35=89.25mm 255x0.45=114,75mm And this means that the 255/45/18 tires are two inch taller than the OEM 255/35/18. __________________ F10 520d M-Sport Alpine White \| HRE P43SC 20x9+20x11 \| Michelin PSS 255/35+295/30 \| KW V3 Coilover \| M5 Front Sway Bar + M550d Rear Sway Bar \| 3DDesign Front Lip \| BMW M Performance CF Spoiler \| BMW M Performance Diffuser \| BMW M Performance Black Grills \| BMW M Performance Pedals \|
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01-14-2011, 06:18 PM	#4
VMRWheels BimmerPost Supporting Vendor 2070 Rep 25,981 Posts Drives: BMW Join Date: Jun 2007 Location: Anaheim, CA iTrader: (4) Garage List 2013 BMW M3 [10.00] 2015 BMW M4 [0.00] 2013 BMW F30 [0.00] 2014 BMW F22 [0.00] 2013 BMW F06 [0.00]	Ditto, you'll want to look into a 255/35/18 for the proper diameter tire. -Charles@VMRWheels __________________ VMR\|Wheels \| 714.442.7916 \| sales@velocitymotoring.com \| www.velocitymotoring.com \| facebook \| flickr \| Instagram
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01-17-2011, 09:20 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)	225/40R18 or 235/40R18 for the front. Rears can be those sizes or 255/35R18. __________________ 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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