i bought tires today at a tire store , i bought the turf master by carlisle , they take 30 lbs air preasure ,and are 4 ply ,,they are about 10 dollars each more that the turf savers , i have two doodlebugs one with stock tires , when you push the one with the stock tires you feel the tire rumble in the bars , with the turf masters you don,t feel any rumble at all . they have the same tread patern