Originally Posted by Slo86GT
So it's more like driving without an adult male in the passenger seat everywhere you go.
No, not x4. Removing 1 lb of wheel weight would be like removing 1.3-1.4 lbs of equivalent mass, per wheel. Doing that for all four wheels, using say 1.38lbs x 4 = 5.5 lbs.
Here's a nifty calculator that does a decent job of estimating rotating inertia for wheels and tires.
The Effects of Rotational Inertia on Automotive Acceleration