10 years later - for those interested, I just weighed my stock 287's (identical to 189's I believe). On them were PS4S, 225/40/18 and 255/35/18. They weighed as follows.
Front - 8's wheels, 225 tires - 49.7 & 50.3
Rear - 8.5' wheels, 255 tires - 51.6 & 52.6
Michelin claims the tires weigh 21 pounds in front, and 23 pounds in back.
I believe there's a few things floating around saying 287's are 24 pounds in front and 26 in back. Other numbers floating around say they're around 28 pounds and 30 pounds each. FWIW, I believe the accurate weight for 287's is around 28-30 pounds each, unfortunately. Bring on the apex's!!!
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