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Old 07-05-2004, 01:26 AM   #1
valley wagon
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Default wheel weight vs performance

I want a set of volk gt-c on 18's but I found out that they weigh 22 pounds! I know that it'll affect my performance but by how much? Please don't say alot or something like that.
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Old 07-05-2004, 01:56 AM   #2
Uncle Scotty
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The lighter the better....22 pound wheels are a lot....I noticed the difference immediatly when I put new tires on that weighed 3 pounds each more than the ones they replaced.
I'll go back to a light tire next time.

I'd try to stay under 20 pounds/wheel
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Old 07-05-2004, 12:30 PM   #3
Zack
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I didn't think too much about un-sprung weight a while back, but since then I've learned more about suspension and also seen how my own car takes bumps with completely worn out shocks, and I can safely say it's a big deal. See, he whole point of the suspention is to keep the tires on the ground at all times, right? So if the wheels, tires. brakes, controll arms, ect. are heavy, it's harder for the suspention to push it all back down to the ground when the wheel gets jounced upward by a bump. Look at my car, I go around a medium turn at 40-50 mph on rough pavement and my rear end can move up to 7 or so inches just by bouncing off the pavement. Some people I think call it wheel studder.

Also lighter wheels means less rotating mass, so that helps much more than weight reduction of static parts for exeleration.
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Old 07-05-2004, 01:29 PM   #4
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Quote:
Originally posted by Zack
I didn't think too much about un-sprung weight a while back, but since then I've learned more about suspension and also seen how my own car takes bumps with completely worn out shocks, and I can safely say it's a big deal. See, he whole point of the suspention is to keep the tires on the ground at all times, right? So if the wheels, tires. brakes, controll arms, ect. are heavy, it's harder for the suspention to push it all back down to the ground when the wheel gets jounced upward by a bump. Look at my car, I go around a medium turn at 40-50 mph on rough pavement and my rear end can move up to 7 or so inches just by bouncing off the pavement. Some people I think call it wheel studder.

Also lighter wheels means less rotating mass, so that helps much more than weight reduction of static parts for exeleration.
Which is why I deceided on SSR Comps and light tires.
My 17" SSR's with light tires weigh LESS than the stock wheel/tire combo. It REALLY does make a difference.
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Old 07-05-2004, 07:51 PM   #5
Len
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The real effect of heavier wheels can be all very subjective, and it also depends on how demanding a driver you are. But in terms of acceleration, if you go from stock wheels (16.5 lbs) to those that you mentioned plus fatter tires, it will be like adding (roughly) 50~ 70lbs chassis weight. That's about 2 % of the total weight, and you'll be about that much slower. Then there's the unsprung weight factor which might be more apparent since the wheels/tires account for a large portion of the total unsprung weight.

Do a search on "rotational inertia" and you'll find a few informative threads.
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