Now i'am in a big dilema. In my Mugen truggy, i've a 1515 1Y on 4s, and i'am gear 15/46, for a speed of about 40mph (on BrianG calculator).
Now, i don't know if i'll sell my 1515 1Y and buy a 1515 2.5d and run it on 6s, with a 14T pinion for a speed of about 42mph, or run this 2.5d on 5s, gear 16/46 for 40 mph, or simply keep my 1515 1Y and run it on 5s, on 14/46 for a speed of 47mph.
I can't go smaller of 14T on pinion to keep my mechanical brake.