When it comes to talking about a car’s suspension setup, the term ‘sprung mass’ means everything inboard of the springs; that includes the bodyshell, engine, gearbox, anything inside the car (including the driver), and so on.
The ‘unsprung mass’ is everything on the other side of the spring. For the most part, that weight is made up of things like wheels, tyres, hubs, wheel bearings and brakes.
Other suspension parts where one end is inboard and the other outboard (such as suspension links, control arms, driveshafts and so on) can generally be considered as 50/50 unsprung/sprung.
LOW INERTIA
Along with the general benefit of reducing overall vehicle
