k, so if I change pinion/spur ratio to get the same top speed, the difference will be the torque (and power consumption) ? thanks.
so...

i see two stupid ways to get better on a slippy track with my 7.5T
1) I get a 18 pinion instead of my 24, and I loosen my slipper A LOT.
=> slipper burn !
2) I put a 26 pinion and a 75 spur instead of my 81, and I put the ETA of my radio @ 50%
=> motor/ESC burn !
I'm just wondering which one is the most stupid.