The Terra Hardpack Tire is right at home on hard-packed gravel and paved roads, with a wide footprint and a flat central tread that's ideal for any backpacking adventure. Flat Protection: Tread and Sidewall TPI: 330 Color: Black Weight: 585 Defined Color: Black ISO Width (mm): 50 ISO Diameter: 584 / 650b / 27.5 Tire Intended Use: Gravel Tire Intended Use: Cyclocross Tire Diameter: 650b Tire Bead: Folding Labeled Size: 650b x 50 / 27.5 x 2.00 Tire Type: Tubeless Ready PSI: 65