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Originally Posted by benebob
Each manufacture rates their own BUT they must put a rating on it. Hence Bridgestone may say blank tire has a rating of 400 for a 40k tire where Dunlop might rate theirs at 380 for a 50k tire. In other words they don't mean much except for generalization. Of course SVXride's Hoosiers with a 40 rating aren't gonna live as long as a 400 rated tire from anybody. The traction and temp ratings though to my knowledge are universal.
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Ben,
I'm wondering if the traction and temp ratings are relative as well???
In the Tirerack test I linked higher-up on this page:
http://www.tirerack.com/tires/tests/sp9000_rd.jsp
They compare the new Dunlop SP Sport 9000's to the previous SP Sport 8000's. The new 9000's have a treadwear of 280 and double 'AA' rating for traction - while the 8000's have a treadwear of 200 and a single 'A' rating for traction.
In their testing, the 8000's got better ratings in every handling/braking test they did, with the 9000's only shining in road comfort/noise level...
They also noted about the 8000's: "We have recommended the SP Sport 8000 for drivers who have the need of a dual purpose street and driver's school track tire. While it can't match the lap times of today's DOT-Legal competition tires, it provides a lot of performance and durability."
I find it hard to believe that the SP Sport 8000 would get their recommendation as a good street/track tire, if the single 'A' rating for traction & temp caused the tires to be
cooked after a few hot laps on a summer day???
-Chike