Premium Service inner tubes are manufactured to the highest quality. This tube bundle is for use in all 4 tires on a lawnmower, 2 for the front and 2 for the rear. The size marked on the tube may differ from the size needed as most inner tubes are made to stretch in order to fit multiple tire sizes, according the manufacturer this tube will fit on the following tire sizes: Fits Front Tire Size: 15x6.00-6, Fits Rear Tire Sizes: 20x8.00-8, 20x10.00-8, 20x8-8