CushCore is an engineered foam insert that mounts inside a mountain bike tyre. It divides the inner volume of the tyre in half, with air underneath the tread and the CushCore insert next to the rim. The purpose of Cushcore is to improve the ride quality of your bike. It is not just for flat protection. CushCore absorbs shock, stops deflection off obstacles, reduces vibration, and stabilizes the tyre against roll and squirm. Think of it as suspension for your tyres designed to give you a faster, smoother ride. Available as an individual inner for one wheel (including valve) or as a set of 2. The set includes: 2 CushCore Inserts 2 CushCore Tubeless Air Valves Rim Stickers Installation Instructions COMPATIBILITY CushCore is compatible with your current tubeless tyres and rims If your wheels are not tubeless ready, rim sealing tape will be required We recommend the use of tubeless tyre sealant with CushCore Installation with certain tyre & wheel combinations may require two people - one to work the tyre levers, and another to hold the tyre bead in the drop center of the rim. Wire bead downhill tyres are most likely to need extra help. Gravel - An ultra-lightweight insert that reduces fatigue, improves cornering, and helps prevent flats Fits tyre widths 33mm-46mm Fits rims with internal width 19mm-26mm 700c - 120g