Michelin Wild Grip"r Tires Multipurpose tread pattern for single courses with varying terrainsMichelin WildGrip"R for mixed terrainMichelin Descent Technology for downhill cycling Item SpecificationsTire BeadUST FoldingISO Diameter559 / 26" mtnISO Width54mmLabeled Size2.1Color Tread/SideBlackTire TypeClincherTire Diameter26"Intended UseMountainDefined ColorBlack