Schwalbe Thunder Burt Tires.The development goal of this tire was to combine the best of the Racing Ralph and Furious Fred. With its many small lugs, it has the grip of the Racing Ralph but the low rolling resistance of the Furious Fred.PaceStar: fast-rolling cross country compound with easy-rolling base layer, fast center and grippy shouldersItem SpecificationsColorBlackDefined ColorBlackFlat ProtectionSidewallISO Diameter622 / Road / 29"ISO Width (mm)57Labeled Size29 x 2.25Tire BeadFoldingTire Diameter29"Tire Intended UseMountainTire TypeTubeless Ready Clincher Schwalbe Thunder Burt Tire Tires EAN: 4026495879750