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Old 02-16-2009, 06:32 PM   #8860
mr crum
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Quote:
Originally Posted by minittrackmann View Post
What exactly would that roll out equal in pinion/spur size? That confuses me alot. lol

Cody
are u running foam or rubber
all u have to do to figure out final drive ratio is divide pinion into spur then multiply by internal drive ex 64 p 100 spur \40 pinion= 2.5 x 2.0 internal drive= 5.0
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