CushCore is an engineered foam insert to be mounted inside a tire, designed to absorb impacts, reduce vibration and increase lateral stability. These characteristics translate to a more controlled, comfortable, and faster ride.An ultra-lightweight insert that reduces fatigue, improves cornering, and helps prevent flatsDesigned for Tire Widths: 33mm-46mmFits Inner Rim Widths: 19mm-26mmNote: For 650b or 700c Gravel wheels with a 47c tire or wider choose the 27.5 (650b) or 29 (700c) XC modelThe system is designed to be used with tubeless-ready or tubeless converted rims and tires, and is compatible with tubeless tire sealantsThe insert divides the inner volume of the tire in half, maintaining air underneath the tread and the foam insert next to the rimValve stem included CushCore Foam Tire Inserts - Singles Tubeless Conversion Kits UPC: 701822997706