Panaracer GravelKing EXT Tire - 700 x 45 Tubeless Folding BlackPanaracer GravelKing EXT Tire 700 x 45 Tubeless Folding Black. EXT (for EXTREME) is specially designed to excel on mud and wet surfaces. It offers ample traction to keep you rolling in challenging conditions ensuring you never lose control even in the most demanding mud and wet environments. Ideal for gravel dirt and rough pavement TuffTex boasts a supple high thread count casing fortified with precisely engineered bead to bead puncture protection