The original full-performance version. CushCore PRO allows you to push the limits of your tires and suspension to new levels. The best choice for the majority of wheels, terrain, and riders. Tire Widths: 2.1?-2.6? Inner Rim Width: 22mm-35mm Includes: (2) CushCore tire inserts, (2) 44mm CushCore presta air valves, valve core tool, installation instructions, and rim stickers.