A treadmill design using large rollers would have a chosen motor and gearing combination to accomodate the large rollers, likewise for one with small rollers. They would likely be able to impart the same force at the roller (or at least which one would be stronger is unknown and a function of other design variables).
A treadmill design using large rollers would have a chosen motor and gearing combination to accomodate the large rollers, likewise for one with small rollers. They would likely be able to impart the same force at the roller (or at least which one would be stronger is unknown and a function of other design variables).