The Gravel Grinder (GG) is one of the best-selling gravel treads and is known for its versatility beyond paved roads. With an upgraded GG tread design, this tire now offers even better performance. The center diamond tread pattern provides aggressive grip and smooth rolling on all surfaces. The outer and transition knobs are enlarged and reinforced for extra grip in corners and off-camber terrain. The tire offers consistent traction, braking, and control on any terrain, whether it's asphalt, dirt, grass, or gravel. With a dual-layer 260TPI polyester casing and CORAZZAARMOR sidewall protection, the GRAVEL GRINDER offers maximum durability and stability. The PPSGANZO puncture protection system and latex-based inner coating provide additional puncture protection. The tire features a gravel-specific tread with a higher durometer, natural rubber SMARTPLUS compound, which reduces wear and improves durability without sacrificing shock absorption, control, or rolling resistance. Product specifications: - Article number: 00534 - EAN: 8855627005349 - Brands: Challenge - Model: GRAVEL GRINDER - Bicycle type: Gravel bike - Net weight (g): 470 - Maximum pressure (PSI): 44 - Maximum pressure (Bar): 3 - Tire size (Inch): 28 - Tire type: Folding tire - TPI: 260 - Segment: Gravel - Tire size (French): 700x40 - Color name: Tan - Tubeless: Yes - Tire width: 40 - Inner or outer tire: Outer tire - (ETRTO) Tire size: 40 - 622 - Color: BrownBlack