help with wheel size
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Joined: Mar 2007
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help with wheel size
[8D] I'm looking to replace the wheels on my 03' A4 3.0. It's got the 17' s on it right now. But I'm looking to go bigger. Should I just go with a lower profile tire on 18's so that I don't change the overall diameter or does it even matter? Does it make all that much difference with speedometer inaccuracy, or mess with the computer if I go with 18's and keep the same profile tire? (basically expanding the overall diameter by 2' or so.
Senior Administrator
Joined: Feb 2005
Posts: 13,574
From: Lotsa places, currently Metro D.C., USA
RE: help with wheel size
This tire-size calculator should demonstrate, for you, the answer to your question
http://www.miata.net/garage/tirecalc.html
But, basically, if you go UP in wheel diameter you MUST go DOWN in profile aspect
http://www.miata.net/garage/tirecalc.html
But, basically, if you go UP in wheel diameter you MUST go DOWN in profile aspect
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