4 Storage Tire Wheel Covers Camper Car Auto Trailer Truck RV fits 37" 38" 39" diameter tires Covers Fits 37", 38", 39" Diameter Tires Thicker Canvas material than other covers, (324.5gm/m^2) wire rod sewn-in retainer and brass grommets for a snug and storm proof fit The durable canvas material breathes. Great for winter storage or keep sun from cracking you tires.