Which statement correctly maps the terms rimpull and drawbar pull?

• A. Rimpull is for tracked machines; Drawbar Pull is for wheeled machines
• B. Rimpull and Drawbar Pull are unrelated
• C. Rimpull is the usable force at the tire-ground contact, while Drawbar Pull is the same as rimpull but for tracked machines
• D. Drawbar Pull is the same as rimpull, but for tracked machines

Answer: (C)

Rimpull is the usable tractive force acting at the ground where the tires or tracks push against the soil. Drawbar pull is the force that can be transmitted to a load attached at the drawbar. For tracked machines, the drive forces develop at the ground and are transmitted through the tracks directly to the hitch, so the pull available at the drawbar is essentially the same magnitude as the rimpull. That’s why the best description is that rimpull is the ground force, and drawbar pull is the same value as rimpull when dealing with tracked machines.