Originally Posted by
shaftboy
I have spoke to guys at my local club and they are running 3.9 FDR in 17.5 can the TT02 do this?
The lowest i can go with only using tamiya spur/pinions is 4.68 (90T spur with a 50T pinion).
If you want to go lower in FDR then you need to modify the motor cover to be able to mount the large pinions.