We would never think of riding a mountain or gravel bike that wasn't shod with tubeless tires. The ability to run lower pressures and the increased flat prevention can't go unnoticed. While it's been a little bit slower to catch on with the road set, more road tubeless tires are currently available, and the technology, materials, and reliability have vastly improved. Shimano has been on the forefront of road tubeless know-how from the get-go and the Japanese bicycle component manufacture has been delivering tubeless road wheel options for over a decade. The durable Ultegra-level WH-RS500 wheelset adds to Shimano's current lineup and brings road tubeless to the masses is weighing in at just 1649 grams and built for rim brake use.