whiterps13 wrote:actually youre wrong. 3-5 lbs per wheels is pretty significant, once you factor in that rotational mass is sometimes 5x heavier than stationary. so saving 15-25 lbs per wheel times four is damn significant.
Not quite.
The effect of unsprung weight is more like 2 - 3 times it's normal weight in sprung mass in terms of suspension performance, but everyone has their own number.
The benefits of minimizing unsprung weight are good and well worth looking into.
Suspension will ride softer with less unsprung weight due to the reduction in frequency, and magnitude of the forces when you hit a bump or dip in the road.
Suspension will react faster, less mass = less force to change it's direction.
Your car will actually stop faster, this is a benefit in wheel and tire unsprung weight only because the inertia of the wheel and tire must be overcome by the braking torque before the force is transfered to the tire.
Your car will accelerate faster, it is easier to accelerate a lighter mass than a heavier one. Same principle as the braking just switching the direction of torque.
Less wheel hop, this is a result of the rear suspension now easier task of maintaining the tire surface to the road.
Now you know why it is crucial.