Tubeless ready tires are compatible with both tubeless-ready and standard rims. When used on a tubeless-ready rim with a special tubeless rim strip or rim tape, valves and sealant (sold separately), the tire and rim form an airtight chamber, allowing the tire to be inflated without a tube. This lets you run lower pressure for optimum comfort and control without fear of pinch flats. When used with a standard rim, the tire can be mounted and inflated with a tube.