Originally Posted by
theisgroup
in 1/12th we only talk rollout. ask the 3 wise men of 1/12. with just talking spur and pinion you could be way off on gear. just to give you an idea with 76 spur, i use pinions from 39-45. just depends on tire size. so rollout is the onlyw ay to convay gearing correctly.t he only question is standard or metric
At the carpet nats in Omaha and running a 17.5 in stock, we where rolling out anywhere from 78 to 90 depending on which motor, timing & tire diameter. Of course, on carpet the tires where pretty small. I think around 43mm on the rears. Our pinion gears looked like pizza pans!!!