Wheel weight vs over all weight.

[California98Civic]

Originally Posted by cbaber

California98Civic, these would look pretty cool, they are lightweight, semi-aerodynamic, and only $100!

http://ecomodder.com/forum/showthrea...els-27334.html

that's a great price. bet those are quite light. but my pair of 13" defenders arrived today, so I'm commited. Someone should buy 'em.

[Vekke]

http://www.caranddriver.com/features...d-tires-tested
I did some number crunching:
Estimation of the VW Golf 2.5 automatic weigth: 3000 lbs
Biggest weigth difference in the test was 54 lbs vs 40 lbs -> 14 lbs x4=56 lbs of standing weigth. Because its rotating weigth you can try using x3 to get actual effect to acceleration. --> 168 lbs lighter car
168/3000=0,056 ->5.6% ligther car

0-60 MPH acceleration: (7,6sx0,056)+7,6s ->8,02seconds slower time with heaviest wheel. measured time was 7,9s for that 19" wheel set

1/4 mile: (15,9s*0,056)+15,9s -->16,8s. Actual time was 16.1s so calculation is not accurate here for some reason. Check that last link. In 1st and 2 gears the wheel weigth effect can be up to 30% higher than with higher gear as low as 5% with same weight difference.

Then again 0-100 mph: (22,3s*0,056)+22,3->23,5s measured time was 23,4s. I think here the aero starts to slow down as effect was not that big at that 1/4 mile times even speeds were already 86-88 MPH.

Here is nice calculator: http://stephenmason.com/cars/rotatio...ml#wheelstires