A few new tires have either just been released in the "Extreme Summer Performance" category, or are in the pipeline for the next 6-12months. These could all be good options for our 818's.
BFGoodrich Rival - Just released, competitively priced ($149 for a 225/45/17), and getting great dry weather reviews (no wet data that I can find yet). Some good information and links can be found on this Facebook post: https://www.facebook.com/notes/holli...09412972476008
Bridgestone RE-11A - Available now. No information yet on if this tire is any better or worse than the RE-11. 245/45/17 is $165 each. But the RE-11 has been consistently one of the best tires in performance tests.
Kumho V720 - Rumored release of early 2014. Essentially a more aggressive Kumho XS designed to compete with RE-11A, AD08, an Direzza ZII. Should be priced right around the XS so should be in the $150-170 range for a 225/45/17
Other currently available options (not new releases)
Yokohama Advan AD08
Dunlop Direzza ZII
Toyo R1R
Kumho XS
Hankook Ventus RS3
Some recent track testing data from that Facebook link:
44.45 BFG gForce Rival
44.68 Hankook RS-3
44.80 Yokohama AD08
45.32 Dunlop Direzza Z1
45.37 Toyo R1R
And here's the Tire Rack preliminary autocross test with the same trends as the road course:
29.2 BFG gForce Rival
29.4 Hankook RS-3
29.4 Yokohama AD08
29.8 Dunlop Direzza Z1