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Discussion Starter · #4 ·
ok ok i should know

ok i know i should know this but i have never heard of roll-out. we just always used ratio's, when getting a gear set-up. can someone get me the spur and pinion teeth number so i can get close. the motor is a kc 19 turn.

thanks
 

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Roll out is how far the car will travel with one revolution of the motor. This takes into effect your tire size and gear ratio

diameter of tire x pi (3.141) divided by gear ratio= roll out.

having two axles with a 2 tooth difference (say 118 and a 120) will let you dial in when your tires wear down.
 
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