"scratching the surface"

[Eventorizon]

Speed 900's are to rare to be used in a new machine now they have stopped production.

You would be better off spending the money on some 16:1 banebots with 550 motors, then putting 124mm wheels on them. That will do a theoretical top speed of around 18MpH on a 5S lipo. That would equate to some serious spin speeds.

[maddox10]

Otherwise, brushless setups are popping up here and there.
The motors ain't the issue anymore , it's the speedo's.