Couldn't find a smooth or grooved tread, this tread chews a bit on the turf when you're not driving. The camps are terrible. , one broke in the first week. No center bearing spacer. According to the review it fits Grasshopper 72x but it has a too narrow hub and the center is wrong, I had to buy a set of spacers to fit it. May not be recommended for some or serious gear with quality bearings. May be ideal for DIY karts that require cactus proof tires but stay away from working tractors.