Direct drive ( motor to wheel directly)

[Gigahertz.t]

As @Brayden21510R said, connecting a 600 rpm motor to any wheel size >2.75" will result in pretty insane speeds, and insanely awful torque.
Reducing the speed via code does nothing to affect the torque (which affects acceleration and pushing power). Your drivetrain will have roughly the same acceleration and pushing power (which are awful for such a speedy gear ratio) as if it were at full speed.

I recently made a post about the difference between reducing the speed via code and using different gear ratios:

Difference between gear ratios and lowering rpm via code

Short Answer / TL:DR Gear ratios change the limits of the motor’s output - the maximum speed and the maximum torque. Coding for rpm changes just changes the speed of the motor, given that it is within bounds of the current gear ratio’s maximum speed. We use both all the time - I for example use gear ratios to lower the maximum output speed of 600 rpm motors to 450 rpm and increase the maximum torque for fun things like acceleration and pushing robots, and in the code I change the rpm of the mo…