Size: 1.9/4.75/1.4 Designed with cut Treps in mind, its deep and aggressive lug pattern gives the Voodoo KLR its reputation as the ultimate go anywhere, do anything tire! EXCLUSIVE & PROPRIETARY FEATURES: VEX (Vertical Extreme) Rubber Compound! Double Deadband anti rebound technology. This feature is engineered into the sidewall and greatly reduces bounce and allows the tire to easily conform to the terrain. Engineered sidewall: Deep, specially shaped ribs allows the user to utilize very very soft foams without sacrificing side hill integrity. FoamLoc: Grooves found on the inner diameter of the carcass help prevent the foams from moving side to side. EZ Mount engineered beads...simply put, the easiest tires to mount in the industry! Foams: Not included. Because of its unique sized and configuration, Ottsix foams are highly recommended for this tire. COMPOUND AND FOAM RECOMMENDATIONS FOR THE KLR/X4: BECAUSE OF THEIR UNIQUE SIZE AND STANCE, WE HAVE VERY SPECIFIC COMPOUND / FOAM / RTR WEIGHT RECOMMENDATIONS FOR THE KLR/X4: RED COMPETITION COMPOUND (EXPECT RAPID WEAR): RECOMMENDED FOR TRUCKS WEIGHING UP TO 8 LBS. GOLD COMPOUND: RECOMMENDED FOR TRUCKS WEIGHING 8-12 LBS. SILVER COMPOUND: RECOMMENDED FOR TRUCKS WEIGHING 12 LBS AND OVER.