The Knobby pattern dirt tire for when you need the ultimate in traction on hard pack dirt or short dry grass. A few Kold Kutters can be added for extra grip. Bishop Racing products manufactures each tire by hand and offer premium compounds that outlast competitor tires. No more ballooning or tires coming off the bead locks. Works extremely well with all the big HP engines. These are complete wheel/tyre assemblies as one, simply remove your stock wheel hubs and fit the 4 stud adaptors supplied, then bolt the wheel/tyre onto the car securely for long term reliable use.