As tyre designers the Ultremo is the pinnacle of Schwalbe's ambition. They strived relentlessly to increase its speed and installed the ZX with HD Speed Guard and RaceStar Triple Compound. Both components are perfectly tuned to the requirements of an outstanding competition tyre. The result: Significant reduction in rolling resistance. Even so they used additional material to reinforce the tyre shoulders and to ensure a considerable increase in mileage. The Schwalbe Ultremo ZX Tyre - the best Ultremo ever!