Never let soft sand, mud or rocky terrain bog you down again. The Rover wheels will retrofit to all Malone carts without need for axle extensions or frame modifications. (May fit other kayak carts with a 3/4 inch Axel.) These 7.5 inch wide tires feature a deep dish wheel design with 10 support ribs for structural integrity. Wheels are 9 3/8 inches in diameter. Your axel will need to extend approximately 3 inches to retaining pin hole.The Never-Go-Flat solid rubber tires provide peace of mind when your miles from an air pump. All terrain wheel upgrade kit is sold as a set of 2.