RE: Mystery Solved! How to select the proper gearing for your electric RC!
By the way, you guys are right. Circumference is Pi times the radius squared, of Pi times the diameter. My Bad!
I ditched the Speed gems and the LRP ESC yesterday. I bought the Novak SS brushless 4300 kit. Holy Cripes is that thing fast!!!!!!! I used my magic formula to determine the proper pinion gear for the setup. I ended up with an 87x17, running my Pro Line Dirt Works. I came up with a final drive ratio of 12.28. According to the Novak web site, the optimum final drive ratio is 12.30. Pretty good for someone who dropeed out of college 15 years ago!
The theoretical top speed for my truck with this motor ans setup is 30.75mph. That is 2.57 mph faster than my over geared Speed Gems Chromium, that I melted.
Oh I'm using math! I hate math!!!!
[:@]