Unsprung Mass

In a ground vehicle with a suspension, the unsprung weight (or the unsprung mass) is the mass of the suspension, wheels or tracks (as applicable), and other components directly connected to them, rather than supported by the suspension. (The mass of the body and other components supported by the suspension is the sprung mass.) Unsprung weight includes the mass of components such as the wheel axles, wheel bearings, wheel hubs, tires, and a portion of the weight of driveshafts, springs, shock absorbers, and suspension links. Even if the vehicle's brakes are mounted outboard (i.e., within the wheel), their weight is still considered part of the unsprung weight.

Read more about Unsprung Mass:  Effects of Unsprung Weight, Unsprung Weight and Vehicle Design

Other articles related to "unsprung mass, unsprung, mass":

Unsprung Mass - Effects of Unsprung Weight
... The unsprung weight of a wheel controls a trade-off between a wheel's bump-following ability and its vibration isolation ... in the road cause tire compression—which induces a force on the unsprung weight ... The unsprung weight then responds to this force with movement of its own ...
Unsprung Mass - Unsprung Weight and Vehicle Design
... Unsprung weight is largely a function of the design of a vehicle's suspension and the materials used in the construction of suspension components ... as a rigid unit, generally have greater unsprung weight than independent suspension systems, in which the wheels are suspended and allowed to move separately ... Inboard brakes can significantly reduce unsprung weight, but put more load on half axles and (constant velocity) universal joints, and require space that may not be easily ...
Bicycle Suspension - Terminology - Unsprung Mass
... Unsprung mass is the mass of the portions of bicycles that is not supported by the suspension systems ... saddles, riders may provide suspension with their knees, making their mass be sprung mass, but all of the mass of the bicycles remains unsprung mass ... that travel is a much bigger motivator than unsprung mass in determining where to put the suspension and how much to use ...

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