Introducing the fastest SES tire ever made, and one of the outright fastest on the market. The SES Race Day is what the name implies - a tire developed for the days when you pin on the number and every second counts. With up to an 8.5 watt improvement in rolling resistance, and up to 75 grams of weight savings per tire over the standard SES, the Race Day is a game-changer. Featuring a nano-technology enhanced rubber compound, novel casing construction, and our aerodynamically optimized SES tread pattern and shape - these tubeless tires deliver. As a pure performance tire, the SES Race Day prioritizes speed over puncture resistance and longevity. Product Details - Absolute, all out speed is prioritized with the ENVE Raceday tire. - Tubeless Ready - Save up to an 8.5 watt improvement in rolling resistance - The 27c comes in at a svelte 195g and 29c weighing 210g, saving up to 75 grams of weight savings per tire over the standard ENVE SES Tire.