I have no experience wit these motors but if they are standard 9.6V Can 680 brushed motors, which they appear to be, they can run at 12V fine. If they were direct drive on a prop or without the gearbox, they wouldn’t last long but with the planetary box, they should be ok.
A bit less RPM, a little less torque but they are 12V and alot shorter if size matters.
The beauty with the motors you mentioned, they are standard Johnson 680 can motors. So you could mount a more powerful motor on with no problem if you need to upgrade. There are countless high torque and high RPM motors that are the standard 600 and 680 size, available for R/C Cars. You could throw a high torque R/C car motor in for another $30 and get alot more torque if you need it.
sweet, thatsnk for the advice guys, i dont them them a certain length though, im planning on owerlapping them and offsetting them so that they are next to each other
and imusing these absolute beasts because will be driving a tracks off of them, 1 per track, and i will need torque a plenty, pluse they are less expensive than the others i have
thats sick that i can upgrade the motors easily, glad about that, just in case these dont work well, which, for some reason, i dont think ill need to do