Cush Core XC Tire Insert Single 27. 5"Lightweight Protection Cush Core tire inserts are designed to add a layer of protection to your tubeless setup. It absorbs big hits, prevents rim damage, withstands repeated impacts without degrading, and reinforces tire sidewalls to prevent tire roll and increases traction in corners. The XC version of the Cush Core is a lighter-weight option designed for cross-country racing, light trail riding, and less aggressive riding. Features Tire widths: 1. 8" - 2. 4"Inner rim width: 22 - 32mm Includes: 1 Cush Core tire insert, 44mm Presta valve, valve core tool, instructions, and rim stickers Reduces flats and increases traction Absorbs big hits and prevents rim damage Reinforces tire sidewalls to prevent tire roll | Cushcore | Xc Tire Insert Single 27. 5 Xc 1. 8 2. 4 Single