How CarCareTruth Scores Tires

What We Measure — and Why It Matters

Two things decide most tire buys: will it stop you in the rain, and how long will it last. A tire is the only part of the car touching the road, so wet braking is a safety question, not a preference, and tread life is what you actually pay for over the miles. CarCareTruth scores tires on how well they do those jobs and the others owners care about — using published data, never a claim that we drove on them.

The Quality Score

Quality (75% of the CCT Score) leads with wet grip and safety, then weighs real tread life, dry grip, ride comfort and noise, winter capability, and how owners rate the tire over time. A tire with an AA wet-traction grade and short, independently-measured wet braking scores far higher than one rated C that owners report sliding in the rain. We read the federally-stamped UTQG grades (traction, treadwear, temperature), independent track and wet-braking tests from Tire Rack, Consumer Reports, and TÜV, the 3PMSF severe-snow mark, and thousands of owner ratings. The mileage warranty on the box is treated as a claim to check against owner odometer data, not as proof. Tires with thin data are scored conservatively and flagged, not guessed.

The Health Score

Every tire gets the same health score on purpose. A finished tire is cured rubber and steel — there is no chemical exposure when you mount it or drive it, and there is no SDS for a tire. Because we also have no per-tire toxicity data, giving each tire a different health number would be guessing, and guessing is the opposite of what this site is for. The health score reflects physical-use realities only — there is no chemical exposure in normal use of this product, and there's no SDS for a tire.

The Environment Score

Every tire also gets the same environment score, and it is below average for a reason. Tire-tread shedding (microplastics) and 6PPD-quinone that washes off roads into waterways affect all tires roughly equally, and there is no per-tire data to separate them (rolling resistance does vary by model, but it is captured in the quality score, not here). Rather than fake a per-tire "green" ranking, we give the whole category one honest number that surfaces these real, shared concerns.

The CCT Score

Quality 75%, Health 15%, Environment 10% (Stage 1), then blended at 75% with a 25% CCT Opinion editorial score (Stage 2). Because every tire shares the same health and environment number, a tire's CCT Score really comes down to two things: how well it performs and how honestly it's sold. For a strong all-season with a quality score of 7.6: Stage 1 = (7.6 × 0.75) + (9.5 × 0.15) + (4 × 0.10) = 5.70 + 1.425 + 0.40 = 7.525. With an editorial opinion of 8.0, Stage 2 = 7.525 × 0.75 + 8.0 × 0.25 = 5.644 + 2.00 = 7.64 — a CCT Recommended tire.

What This Score Doesn't Measure

Scores are based on published UTQG grades, independent tire tests, and owner-review data — not hands-on testing. CarCareTruth has not driven on these tires, and there is no SDS or chemical analysis for this category. We score a tire model, but real fit and safety depend on the size, load index, and speed rating for your vehicle, and on proper inflation and alignment — always match the size on your door-jamb placard. Wet grip and tread life also change as a tire wears.

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