What kind of DC motors + battery do I need for my heavy robotic tank project ?ty

30 kgf.m at 418 rpm is a massive figure, bears no relation to reality. about 13kW of power in fact.

The power needed to propell 35kg up a 45 degree incline at 1 m/s is 240W (not including losses),
so I suspect a sensible power requirement is more like 500W than 13,000W...

If the wheel radius is 5cm (guess), with 500W mechanical power, then 1m/s equates to 190 rpm and 25 Nm
of torque (total for all drive wheels).

So what top speed do you want?