Bob W.

Not a comprehensive list, but some of the more common/popular ones. The only reason I decided to post this is that I was a little bit surprised to find that there are several tires that are 4-5 lbs apart in weight at the same size...interesting. Also note that the 3 most common tires that ship with the RS4 as OEM (U.S) are also the lightest tires in that size (24 lbs.)....I guess Audi did their homework.

From tirerack.com: (note some are 'upsized' fitments)

Bridgestone RE050A 255/35ZR19 96Y XL = 28 lbs.
Bridgestone RE01R 275/30ZR19 92W SL = 30 lbs.
Bridgestone RE050A Pole Position 275/30ZR19 96W XL = 30 lbs.

Continental Contisportcontact 2 255/35ZR19 96Y XL = 24 lbs.
Continental Contisportcontact 2 275/30ZR1996Y XL = 25 lbs.
Continental Contisportcontact 3 255/35ZR19 96Y XL = 26 lbs.
Continental Contisportcontact 3 275/30ZR19 XL = 26 lbs.

Dunlop SP Sport 9000 255/35ZR19 96Y XL = 25 lbs.

Goodyear Eagle F1 GS-D3 255/35ZR19 96Y XL = 25 lbs.
Goodyear Eagle F1 GS-D3 275/30ZR19 96Y XL = 26 lbs.

Kumho Ecsta SPT 255/35ZR19 96Y XL = 28 lbs.
Kumho Ecsta SPT 275/30ZR19 96Y XL = 30 lbs.

Michelin Pilot Sport 255/35ZR19 SL = 24 lbs.
Michelin Pilot Sport PS2 255/35ZR19 96Y XL = 25 lbs.
Michelin Pilot Sport PS2 275/30ZR19 96Y XL = 25 lbs.

Pirelli Pzero Rosso 255/35ZR19 96Y XL = 24 lbs.
Pirelli Pzero Rosso 275/30ZR19 96Y XL = 27 lbs.

McGyver

Good info - thanks, bob

BergeyRPI

Same thing for the S4. Contis are some of the lightest.

S4gasbord

Also, Michelin Pilot Sport Cup 265/30ZR19 is 23lbs

Bob W.

that's a 3% smaller diameter...265/35 would be better, and cups don't come in that size.

BergeyRPI

Just think, 3% smaller diameter = less rotational inertia!