This cart has 24cm (blow-molded polyurethane) pneumatic tires. These tires have a high capacity and are very durable. Welded Stainless Steel frame. The wheels are easily removable for storage (176lb capacity). This is an all-around cart for soft sand and uneven terrain. The tires are wide and can be deflated for better performance over softer sand and soil. Hobie #80044101