Extremely air-tight! Less air loss means having to inflate less often. Our unique rubber mixture makes it possible. Extremely reliable! Each SCHWALBE tube is individually examined twice at the factory to ensure air-tightness. Special quality control that prevents unpleasant surprises. In Schwalbe talk, the SV is presta and the AV valve is Schrader. These tubes will fit 451 tires from 28 - 37mm's in width.
For mile eaters. Durano, a 20 x 1 1/8" 451, is the right choice for high mileage purposes, because no other racing tire lasts longer. At the same time the Dual Compound offers great grip for training on wet winter roads. It has the proven RaceGuard protection belt. Inflates up to 120psi. Non-folding only.
We are still waiting for stock on this one! We are taking back orders. The 20" Ultremo's are in black only. As tire designers the Ultremo is the pinnacle of our ambition. We 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 tire. The result: Significant reduction in rolling resistance. Even so we used additional material to reinforce the tire shoulders and to ensure a considerable increase in mileage. ZX - the best Ultremo ever!
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