Flat Free Zero-Turn Lawn Mower Smooth Tread Tire Assembly with Universal Kit, 11x4.00-5; Fits most zero-turn lawn mowerbrands; Fits 3/4 in. axle size; 3/4 in. bushings installed; Universal adapter kit with the smooth tread tire assembly includes two washers and four spacers; Flat free tires with a smooth tread pattern.