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Discussion Starter · #1 ·
This is a ranking of performance street tires (suitable for SCCA STS, STX, STU classes) that was compiled based on combined tests from the Tire Rack and Grass Roots Motorsports. The original tests themselves can be found at:

It should be stated that no tire test is perfect and combining different tire tests done with different cars only adds to the problems. The relative ranking of two tires can depend on such things as how well the test car was set up (alignment, shocks, and such things), the course used (how tight and twisty, how long, constant speed VS. lots of acelleration/braking), but there was enough consistancy throughout the tests that it speaks highly of people at the Tire Rack and Grass Roots Motorsport and their test procedures.

one other note for clarification; the Tire Rack tests were done on a 31 second course and the Grass Roots Motorsport tests were done on a 43 second course. In order to combine the tests, all the time differences were converted to a 60 second course and those are the dT (delta Time) values shown below.

rank dT(dry)TIRE
10.00Falken Azenis RT-615
20.33Michelin Pilot Sport PS2
30.38Falken Azenis RT-215
40.42Yokohama ADVAN Neova AD07
50.71Michelin Pilot Sport
60.74Hankook R-S2 Z212
70.77Goodyear Eagle F1 GS-D3
81.00BFGoodrich g-Force T/A KD
81.05BFGoodrich g-Force T/A KD (consistancy check)
91.04Bridgestone Potenza S-03 Pole Position w/UNI-T AQ II
101.14Bridgestone Potenza RE050A
121.29KUMHO ECSTA MX [ 1.44 = average(1.29,1.58) => 12th place ]
111.31Michelin Pilot SX MXX3
121.58KUMHO ECSTA MX [ only ~10% of 1.58 seconds inconsistancy ]
131.66Pirelli PZERO Asimmetrico
142.16Yokohama AVS Sport
152.49Goodyear Eagle RS-A ( smaller tire used )
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