Originally Posted by Cash4587

Whoops. I was thinking of steam locomotives. And here is my reasoning, steam locomotives built to pull passenger trains had larger wheels to have a higher top speed to get to places on time. If the same passenger locomotive was then later retrofitted with smaller wheels because it needed to pull freight, it now had more torque to pull that extra weight that passenger trains didn't have. Sorry, that is why I said "Smaller wheels = more torque".. I will be clearer next time