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Old Dec 19, 2011 | 08:39 PM
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dj_akademix
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Default Rolling radius

Quick question:

Do the 225/40/18 alloys and tyre combo on my GB270 have the same rolling radius as 225/45/17 if I fit them?
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Old Dec 20, 2011 | 01:02 PM
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From: Rl'yeh
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This is useful: http://www.miata.net/garage/tirecalc.html
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Old Dec 20, 2011 | 01:12 PM
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I work it out as 1.45mm larger rolling radius on the 18s.

That's only a drop of 0.46%

(Java isn't up to date on the work computer )
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