Pro-Line STEP PIN M3 2.2 TRUCK TIRES Fits any 2.2" truck wheel. Great all around tire for moist loamy track conditions, providing good traction and stability in loose dirt. XTR-M3 compound is ULTRA soft, it is even softer than the super soft. This product includes two Pro-97 Step Pin 2.2" Rear Truck Tires and Two Foam Inserts.