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Consider that many Insurance companies do not cover replacement costs of stolen wheels if they are not OEM.
I would look hard for used wheels off of a hybrid that might fit your vehicle, especially if they had the factory LRR tires.
Find some one who fell for the "bling" thing and get his take offs for cheap.
Lighter wheels especially with lighter tires will make a significant difference, especially if you can save 5+ pounds per assembly. The power required to double the speed of a flywheel increases exponentially not linearly. Each wheel is a flywheel that requires energy to accelerate. You may get some of it back but never as much as you spend getting up to speed.
I think of sprung to unsprung weight like this. The weight of the components that move up and down when your suspension works, versus the weight of that quadrant of the vehicle that dampens the energy of the rolling mass.
The greater the ratio the less the disturbance to the vehicle when you encounter bumps.
The best ride is when the ratio is greater and you do not need stiff springs and shocks to keep the tires on the pavement.
There are several other factors involved but that is the basic explanation.
regards
Mech
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