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Old 02-25-2006 | 07:41 AM
  #17490  
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tomdav
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From: Coo.. whip
Default rollout
who needs a fancy graph when you have PI. MMMMM PI.

tire dia x 3.14 / spur size x pinion = rollout

example

1.8 x 3.14 / 96 x 28 = 1.65 rollout
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