CST Medallion All Season ACP1

The CST Medallion All Season ACP1's overall driving safety is rated as "deficient" due to significant weaknesses, particularly on winter roads, and it fails to achieve more than a satisfactory rating on dry or wet surfaces. On dry roads, it offers poor steering feedback and is imprecise, requiring corrections and showing a tendency to oversteer, resulting in a barely satisfactory score. On wet pavement, its braking and aquaplaning resistance are satisfactory, but its handling is rated even lower due to a lack of grip and precision. The tire's performance on winter roads is especially poor, with its handling rated as "deficient." It struggles to combine forces, leading to early understeer and oversteer with almost no safety reserves, and it posts the worst result in the test for braking on ice. Environmentally, the Chinese-made tire misses a good rating; while its projected mileage and wear are good, its high weight results in a merely satisfactory efficiency score. Its sustainability is rated as just adequate due to the manufacturer's failure to provide requested ISO certifications or other sustainability credentials.