Schwalbe Durano Tires are taking the place of the Stelvio line up with all the the same features and some comsmetic upgrades. These tires are made of the same rubber compound as the Stelvios for long life and great performance. The Stelvio name was a licensed name which Schwalbe decided not to renew, so in effect the Durano's are the identical tire with a new name. Durano is the right choice for high mileage purposes. They offer great grip on a variety of surfaces especially on wet winter roads. Under normal conditions expected tread life should be over 6,500 miles. They are available in a variety of sizes. The 20" 451 size is available in wire bead only. Schwalbe has dropped the 650c version of this tire which is why it is not listed.