R/C Tech Forums - View Single Post - Best 17.5 brushless motor for off road?

12-11-2008, 03:45 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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