The Challenge Elite Pro Handmade Tubular Tire is a value oriented road tire with a classic a combination herringbone and file tread pattern. Features: Herringbone tread pattern provides a lower rolling resistance center tread File pattern shoulder tread provides additional grip for cornering PPS Ganzo flat resistance Specifications: Tire Type: Tubular Bead: Folding Compound | Casing: Poly TPI (Threads Per Inch): 220 TPI Puncture Protection: Yes Inflation: 145 PSI Color: Tan Wall Weight: 295g (700c | 25mm)