CushCore XC is intended for cross-country racing, light trail usage, and/or light-weight, less aggressive riders. Fitment: tire widths 1.8″ to 2.4″ and inner rim widths 22mm to 32mm. Includes (2) CushCore tire inserts, (2) 44mm CushCore Presta air valves, valve core tool, installation instructions, and rim stickers.