This is a pair of Pro-Line Bow Tie 2.2" off-road buggy tires in super soft M4 compound. The Bow Tie tread is designed for less loamy and wet track conditions, but is a great all purpose tire. If the track is very wet or very loamy, use the Step Pin tire instead. This tire is also great on blue groove hard packed tracks. The drier the track, the harder the compound of tire you should use (ie: M4 when on tacky clay, M3 when very wet, M2 when dry). However if the track is very dusty, you should generally use a softer compound tire.
Click here for Pro-Line Tire Compound Chart.