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Old Wed, December 7th, 2011, 05:55 PM
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Jackpine Jackpine is offline
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With no weight on the tires, they would have a diameter of 31.6" (802 mm) and a circumference of 2521mm. Normally, squish reduces any of those figures by about 3% (multiply by 0.97).

So, I'd start with a diameter of 30.7" or a circumference of 2445mm.

- Jack
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