Actually the Toyo T1R replaced the T1 Plus, which replaced the T1S.
IMHO, with its 280 treadwear rating, the T1R a true high performance tire for long-term highway duty.
The Bridgestone RE-01R, Dunlop Z1 and Falken Azenis 615 with their 140 treadwear ratings are "street" tires for someone who expects the tires to see lots of autocross and/or track duty.
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