The Mud Runner has an advanced tread design that provides ultimate traction in mud and everywhere else that you may ride. Putting a set of these tires on your four-wheel drive ATV will be like turning it into a crawler tractor. They really do grip on any surface! They also feature durable, long-lasting performance, resistance to punctures and bruises and their centerline riding pads offer a smooth ride. They offer deep, well-spaced 1" lugs with excellent mud traction, self-cleaning design and superior tread wear. Six-ply rated construction for puncture resistance, load carrying capability, high/low speed handling and durability. Up front these are the most expensive tires that Montana Jack's has to offer. In the long run, they are the least expensive due to their wear-resistance and durability. If you are a serious ATVer, don't settle for second best. Using these tires ourselves, we have found them to be incredible and we highly recommend them. Tip: We find these tires to perform the best at 3.5 psi cold.