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Journalism in the Public Interest

SONAR

S990 Performance X/P

Size Temperature Rating Traction Rating Treadwear Rating
All sizes
C B A
C B A AA

SX-1 (H & V RATED)

Size Temperature Rating Traction Rating Treadwear Rating
All sizes
C B A
C B A AA

SX-1 (Y RATED)

Size Temperature Rating Traction Rating Treadwear Rating
All sizes
C B A
C B A AA

SX-1EVO

Size Temperature Rating Traction Rating Treadwear Rating
215/50R17
C B A
C B A AA

SX-608

Size Temperature Rating Traction Rating Treadwear Rating
185/60R14, 195/60R14, 195/60R15
C B A
C B A AA
185/60R14, 195/60R14, 195/60R15
C B A
C B A AA
185/60R14, 195/60R14, 195/60R15
C B A
C B A AA
185/65R14, 195/65R14, 205/65R15
C B A
C B A AA
185/65R14, 195/65R14, 205/65R15
C B A
C B A AA
185/65R14, 195/65R14, 205/65R15
C B A
C B A AA
205/60R15
C B A
C B A AA

SX-608 (H RATED)

Size Temperature Rating Traction Rating Treadwear Rating
All sizes
C B A
C B A AA

SX-608 (V RATED)

Size Temperature Rating Traction Rating Treadwear Rating
235/60R16
C B A
C B A AA
All except
C B A
C B A AA

Sources: NHTSA Uniform Tire Quality Grading Standards, TireReview.com