Challenge, Gravel Grinder Race, Tire, 700x38C, Folding, Clincher, Vulcanized, Nylon, 120TPI, Black U-Brakes Barcode: 689228211155

Barcode: 689228211155

Barcode: 4715910038642

Barcode: 708752073579

Part Number: 004950

Barcode: 840840009821

Challenge, Gravel Grinder Race, Tire, 700x38C, Folding, Clincher, Vulcanized, Nylon, 120TPI, Black U-Brakes Barcode: 689228211155Make your mark on the gravel scene with the Gravel Grinder. This tire combines a fast rolling diamond center with aggressive shoulder knobs that only hook up when the terrain gets soft, muddy, or a bit sketchy. This clincher with 120TPI nylon casing provides both performance and durability. Includes PPS, a Puncture Protection System placed between the tread and casing to increase resistance to punctures. Brand: Challenge Model: Gravel Grinder Race