Originally Posted by Dave H

0.07, 0.08, the amount of time in seconds for the servo arm to move by 60 degrees. Complete description is 0.07s/60 degrees for example. A faster servo (lower number) makes the RC more responsive.

Sort of. Technically it’s a twisting force, but with a given servo arm it relates to force. Correct units are a force times a distance, ounce-inch or kilogram-centimeter, abbreviated oz-in or kg-cm. Need to have enough torque to resist wheel forces when loaded up in a corner, including shocks from bumps and such, and provide durability.