This is a pair of 3.8" Pro-Line Monster Truck M2 Trencher X Tires. FEATURES: Fits the front or rear of monster trucks Horizontal H-shaped tread nearly 1/4" (6.5mm) high for huge amounts of forward bite with high degree of longevity and durability Increased sidewall thickness to resist tearing at the bead M2 medium compound INCLUDES: Two 3.8" M2 Trencher X Tires and two Foam Inserts REQUIRES: Traxxas Style Bead Wheels, PROC2733, PROC2703 Tire Glue DTXR2000, DTXR2002 SPECS: Tires- Diameter: 6.50" (165mm) Width: 4.15" (105mm) jxs 12/06/11 ir/jxs BOX DIMENSIONS: 6.38" W. X 4.25" H. X 12.25" L. BOX WEIGHT: 1.36 LBS.