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Originally Posted by woj
hmm, I always thought custom rims are actually lighter than the stock ones...
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Not in most cases... A wheel that is bigger and lighter will be very expensive, and no one every buys those, they buy what looks good or what they can get a deal on.
Adding unsprung rotational weight to the car will cause a much more noticeable performance drop than say, adding the same amount of weight in bricks to the trunk. Cars aren't about power, they're about power-to-weight. Dropping the weight off your car has the same effect as gaining the equivilant amount of horsepower...
Of course on a decent car you won't notice anything, but if you've got under 240 horsepower and replace your stock 17" wheels with some 19" chromies, you're going to notice the car is missing a little something when you accelerate through the gears.