Originally Posted by Maine-iac

Wow! Those are really heavy. My 18x10 Forgestar F14's weigh about 20lbs. A guideline is each pound of rotating mass removed is equivalent to removing 8-10lbs of car weight. Do the math - compared to the 20lb wheels that is equivalent to removing 500+ lbs from the car! Also - the larger the rim diameter, the further away the rim mass is from the center, which takes more energy to start an stop. It's physics man! That is why some guys complain about their cars becoming sluggish after switching to heavy and/or larger diameter wheels. This is probably the easiest way to improve your acceleration times. Another Big Bang for the buck is in the driveshaft - aluminum shaves over 20lbs off from stock!