no, because thats an instantaneous force when it first hits the bump. It will be reduced as soon as the wheel starts moving up and over the bump (i think).

there are more difficulties to consider, its not really an easy problem from what i can tell. The bigger wheel receives less force in the reverse direction. It also spreads out the impact over a slightly longer travel path, which means less force required to do the same amount of work. I think i'll get back to my day job