If you’re looking for a durable everyday wheelchair tire for the active lifestyle wheelchair user this tire is for you! The Primo Sentinel combines the attributes of a high performing lightweight tire with the strength of puncture-resistance. The combination of a dual layer nylon casing and a 3mm anti-puncture insert creates the 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. 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 to provide maximum visibility. Sold per tire Sizes: 24″ (540) 25″ (559) 26″ (590) Tires are directional