1515/1y on 5s or 6s ?

[BrianG]

lol, you wanna run 6s on a 1515 motor spinning at over 40krpm and you want to be able to control it?? That's a lot of power there! Figure a conservative 100A on 6s is almost 3HP, and the torque at the wheels will be quite high as well.

Seriously, geared for ~45mph, it should work very well. In my high speed project thread, Mod Man ran his 15xx Nue to over 55k rpm and it ran fine. And that was geared high!