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.All the performance benefits of the PRO, but optimized for plus sized tires and wider rimsDesigned for Tire Widths: 2.6 -3.0 Fits Inner Rim Widths: 32mm-45mmThe 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: 701822997676