why don't I know this?

[ferrous]

Increasing wheel diameter will cause extra strain on the motor right? So how do I fix this? Do I go up a tooth or two on the spur gear? This is for my (son's) Stampede. Who's got the math on this?

Thanks!

 

[Rolex]

Check out this thread. Posts 8 and 9 will tell you everything about gear ratios. Post 9 includes a chart that allows you to compute your tire size into the formula.

https://www.rcnitrotalk.com/forum/showthread.php?t=60832&highlight=Gear+ratios

 

[ferrous]

Thanks Rolex.