The original full-performance version. CushCore Pro allows you to push the limits of your tyres and suspension to new levels. The best choice for most wheels, terrain and riders.Tyre Widths - 2.1"-2.6"Inner Rim Width - 22mm-35mmWeight - 250g (27.5") / 260g (29")Includes 2 x CushCore tyre inserts, 2 x 44mm CushCore Presta air valves, valve core tool, installation instructions and rim stickers.Not all tyre inserts are created the same. CushCore is no ordinary tyre insert and is based on a new concept, tyre suspension. Any suspension system has a spring and a damper, and with CushCore, pressurised air in the tyre is the spring and the CushCore tyre insert is the damper.Like traditional suspension, a constant damping force wouldn't work. It must be dynamic. Suspension should be supple on small bumps but firm on the big hits.CushCore responds differently depending on the tyre load and scenario. The more the tyre flexes, the more damping it provides.Go Bigger - CushCore improves suspension