The Challenge Gravel Grinder is the best all-around tire in the Challenge Gravel range. This tire offers a perfect balance of traction, cornering, and braking, allowing you to roll smoothly at higher speeds. It's designed to add stability and control, even on soft or wet surfaces. At lower pressures, you can connect the outer knobs to the diamond center tread for extra traction in muddy and slippery conditions. The Gravel Grinder features a sturdy construction with added puncture protection, durable rubber, and tough sidewalls. Product specifications: - Article number: 01941 - EAN: 8855627019414 - Brand: Challenge - Model: GRAVEL GRINDER - Material: Nylon - Bicycle type: Gravel bike - Maximum pressure (PSI): 60 - Maximum pressure (Bar): 4 - Tire size (Inch): 28 - Tire type: Folding tire - TPI: 120 - Segment: Gravel - Tire size (French): 700x42C - Tire width: 42 - Inner or outer tire: Outer tire - Color: Black