Shocks provide resistance by forcing hydraulic fluid (oil) through valves in the piston as it moves up and down. Because the oil cannot be compressed, only a certain amount of fluid can be forced through these valves, which creates resistance to v... read more ... Usefulness: N/A(0 ratings) by Andersen777 () Rate It! this definition is ... useful somewhat useful incorrect spam / offensive

to absorb those nasty bumps and pot-holes; springs or oil-filled, front and rear, various lengths

Properly called a damper, this is an oil filled device used to control spring oscillation in the suspension system. At least one shock absorber is found at each wheel.