***Final ratio ADVICE needed on 5.5t urgent***
 

Hi guys, new to rc and setting up a 5.5T brushless. Need to know what final ratio is best used.

....the transmission ratio is 2.13. What would the spur and pinion need to be?
from what I have read so far the final ratio should be about 9?
Anyone help me out here with some combinations please?

Check this website out gearchart

...thanks mate.

exotica,

It's hard to recommend a gear ratio without knowing the type of car you're racing, and the application.

If you already know you want to end up with around a 9 the easy way to get there is to multiply your spur gear by 2.13 (you mentioned your car had a 2.13 tranny ratio) then divide the result by 9. That will give you the pinion to run to get there.

For example, if you have a 100 tooth spur, multiply by 2.13 = 213. Divide 213 by 9 to get 23.66, so a 23 or 24 pinion would be the place to start.