Question: what is the difference between sprung and unsprung weight on a vehicle?
Answer: What Are the Differences Between Sprung and Unsprung Weight? ... In simple terms, a vehicle's sprung weight is supported by springs of one kind of or another (coiled springs, air springs, Belleville springs). Unsprung weight moves up and down with the wheels as they travel over bumps, potholes, and other obstructions.