Pirelli Scorpion XC R Mountain Tire 29x2.20 Folding Tubeless Ready SmartGRIP ProWALL 120TPI TanwallRear Specific Performance in Mixed Terrain The R model is our rear specific design: medium profile and tread spacing and added traction and durability without compromising performance over a mixed variety of terrains, in dry or wet conditions, enhanced by the SmartGRIP Compound properties. All with a high level of reliability for a longer lifespan: the best combo with an M on front for a completely balanced riding experience. TECH SPECS Tire Weight