Continental UltraContact NXT vs Michelin e.Primacy: The Continental UltraContact NXT and Michelin e.Primacy are two of the most sustainability-focused tires on the market. The UltraContact NXT boasts up to 65% renewable, recycled, and ISCC PLUS-certified bio-based materials, while the e.Primacy was the first Michelin tire designed with a low rolling resistance-first approach to reduce CO₂ …