What is grade resistance?

Grade resistance is the rearward acting force component of the vehicle weight on a grade. It is the amount of force required to overcome gravity, and is given as .01 times the gross weight times the percentage grade, with units of pound force. Read more

Why does Rolling Resistance matter in the real world?

Some 13% of the power produced by the engine to move a long haul rig along a smooth road at 65 mph is “lost” due to Rolling Resistance. What is it, what causes it, and how can you help to reduce it.

Read more