ATB

I am coming from Miata and Subaru land where wheel weight makes a big difference. Heck, I have 15s on the Miata just to get under 10 lbs.

For an S4, it takes a very $$ wheel to get down to the low 20s. How much does a 25-30 lb wheel matter to something as heavy as an S4 if track driving is not in its future?

TwentyValveB5+S4

You can get a good sub-20lb 18" wheel for pretty darn cheap.

Silver Stealth

I would say mainly ride quality, perhaps less noticeable off the track is turn-in ability.

Reggie

a difference in the quickness of the car and in the handling. This was especially true in the B5 A/S4s where the stock S4 wheels were 28lbs and only 17's

Dr.quattro

Unsprung weight=enemy

p3u

Also used them on a B5 A4 and my R32, great wheels.

They make a big differance over stock, I saved ~11lbs per corner, much more responsive and a decent bit faster off the line.

Check my pic post for mor pics, here are a few.

<img src="http://pictureposter.audiworld.com/94164/photo-0031.jpg">

<img src="http://pictureposter.audiworld.com/94164/photo-0033.jpg">


<img src="http://pictureposter.audiworld.com/94164/ecs_rotor1.jpg">

bsrpilot44

:-)

Quatroad

As far as un-sprung weight goes, I think too often emphasis is placed on the weight of the wheel, and not enough on the tire. What weight is saved on a wheel might be gained right back with a heavier tire, with that extra weight sitting as far off from center as possible and having an even greater effect on handling. Any wheel between 18-21 lbs should be just fine - just mind the tire weight.

TwoSeven

^^^^^^^^2nd on the Enkei RPM2s. See my sig.

Stevelev

I made the most of the weight savings when upgrading my wheels by researching many tires. The ride as well as handling improvement was quite noticeable. Tires I have are Hankook K104's and with my Volks, I'm at a combined weight of 41 lbs per corner.