This is a pair of Pro-Line Hole Shot off-road truck tires in M3 compound. The Hole Shot tread is designed for less loamy track conditions. This is a great tire for harder packed tracks, especially tacky clay indoor tracks. The drier the track, the harder the compound of tire you should use (ie: M3 when very wet, M2 when dry). However if the track is very dusty, you should generally use a softer compound tire.