tires, other then snow tires and track tires have wear life numbers and traction ratings, the temperature ratings are what normally suffer with LRR tires, not the traction, some of the really light weight LRR that came stock on some cars also have shorter wear life number.
If you are worried about the temperature rating the best thing you can do is keep the tire pressure up to the proper temp as under inflated tires build up heat faster and according to the owners manuals I've read and the studies that have been done, higher inflation is better for traction when at risk of hydroplaning as well.
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