E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > The Tire Rack's Tire & Wheel Forum

The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
Sponsored by The Tire Rack

Thread Tools Search this Thread Rate Thread Display Modes
Prev Previous Post   Next Post Next
Old 12-16-2012, 05:13 PM   #20
Registered User
Join Date: Oct 2010
Location: KS
Posts: 757
My Ride: '00 328Ci
Originally Posted by sunsetcoast View Post
The difference in diameter is 5%, but the sidewall height differential is actually closer to 8%. The nominal sidewall heights:
  • 225/45 (standard size) = 101 mm
  • 245/45 (optional rear size) = 110 mm
  • 215/55 = 118 mm
8 mm is about 1/3".

Tread depth of a typical tire is 12/32". So the difference between a new and a worn tire (say mounting a "new" spare for a worn one) is 10/32" (or 8 mm). The DSC system would be expected to deal with this.
I don't disagree with your math... but I do disagree with the optional rear tire size. I was under the impression that the rear "wide" tire option was 245/40/17 (per the owners manual). This has a sidewall of 98mm. BMW has kept all the sizes very close in diameter (I believe for a reason).

lmr2wil is offline   Reply With Quote

stupid redneck

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON

All times are GMT -5. The time now is 12:51 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - 2016 performanceIX Inc - privacy policy - terms of use