Rim question invovling weight

[Josh///M3]

Ok, i think i wanna get some SSR competitions. They weigh 15lbs each, a big savings over my stock rims. Will i be able to notice the difference? will less rotating mass make the car do things better? also this is 40lbs static weight off as well.

Need some help,
Josh

[M3 GT Ben]

it depends on the tires you get, too.

get a light tire like bridgestone S-02s, and you'll REALLY feel a difference.

[T///MW]

Not to long ago there was a spirited discussion surrounding this issue - try searching the archives.

Here is a cloudy recollection -

take the four wheel savings and multiply by about 6.1 to get a sprung weight equivalent. ie 10lbs per wheel = 40lbs * 6.1 = 240 lbs.

I switched from stock to Fikse FM5s and figure I saved about 6-8lbs per wheel - I very much noticed the difference in acceleration, braking and cornering. I also got used to it VERY fast.

I think the real bottom line of the discussion was that it matters more where the weight is saved vs. how much. The further out on the wheel the better - so if you are into this kind of thing buy light tires!

Tim

[T///MW]

Actually - here is the link

http://self.phpwebhosting.com/~bimme...&threadid=4023