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Old 12-11-2008, 04:45 AM   #36
jmcvicker
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(78/29) * 2.6 = FDR

So, 78 spur, 29 pinion * 2.6 = 6.99

2.6 is the transmission ratio.

T4 has bigger tires than B4 - so buggy guys need a lower FDR for the same top-speed.
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