"A climber's delight that delivers performance every road rider will appreciate" summarizes the new Ultegra C36 wheel perfectly. C36 describes everything you need to know about the wheel - "C" stands for carbon, adn the 36 indicates the depth of the wheel. Sharing the same profile as the grand tour winning Dura-Ace wheel, the Ultegra is a great option for those who want a top notch carbon wheel upgrade without breaking the bank. Tubeless and clincher compatible, and a 21mm internal rim width makes this wheel up to date with all the modern trends of wider tires, and as such this wheel is optimized for 25-32mm tires (but unofficially, can run much wider such as a 35 or even squeeze a 38mm tire). Simply put, if you want a wheel that is lighter and faster on the climbs, the shallow yet aero optimized C36 is the perfect option.