Primo Sentinel Wheelchair Tires are versatile, low rolling resistance and durable: the Sentinel is a “no compromise” attributes of a high performing, lightweight tire, with the strength of a puncture-resistant tire.The combination of our dual layer nylon casing and a 3mm LDP anti-puncture insert creates our most advanced tire in the Primo Sentinel. The insert prevents long-term debris accumulation with its high-rebound characteristics, while maintaining the integrity of a lighter rolling, longer lasting tire. These advancements strengthen the sidewall and surface of the tire, with our new flat-guard technology. The Primo Sentinel is a non-marking black tire with a grooved tread pattern that provides premium traction, while minimizing rolling resistance. It is available as a sleek, all black tire, or with a reflective stripe, to provide maximum visibility.PRICE IS FOR A SET OF 2 TIRES.California Proposition 65 Warning⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov