Inferno ST-RR Gearing Question

Hello. Thank you all for your replies.
So, using a lower kV motor with the appropriate gears ratio for same top end speed, yields a longer runtime? Does this include changing batteries as well? i.e. from 4S to 5S?

[nuz69]

No, you can keep the same voltage and have better runtimes, but you can up the voltage with a low Kv motor like the longer Castle motor to get even more runtime, for example the 1520 1600Kv and 6S battery.