Tubeless-ready tires are compatible with both tubeless-ready and standard rims. When the tire is mounted on a tubeless-ready rim with special tubeless rim tape, valve, and sealant, the tire and rim form an airtight chamber that no longer requires a tube. This lets you run lower tire pressure with less fear of pinch flats and without the added weight of a tube. Lower tire pressure has many benefits, including greater traction and lower rolling resistance over rough surfaces. The tire can also be used with a tube if you mount it on a standard, non-tubeless-ready rim.