TR (Tubeless Ready) Technology: Tubeless tyres provide the rider with many benefits: the ability to run lower air pressures, which improves traction; lower rolling resistance when compared to a tube-type tyre; and less chance of flatting since there is no tube. Maxxis Tubeless Ready (TR) tyres provide the benefits of a UST tubeless tyre without the weight penalty. Their TR tyres use a standard casing and require the use of a liquid sealant in order to make them airtight. Maxxis Tubeless Ready tyres are the only Maxxis tyres approved for use with liquid sealants.