Versatility, durability and performance designed for the gravel adventurer. Proven Duroc rim technology, wide tubeless channel and easy tubeless setup, the Duroc G30 Expert is ready to roll. Duroc alloy rim with welded seams. Tubeless ready - factory tape, with valves and sealant included. Ringle SRX hubs with enhanced performance. Item Specifics: ColorBlackDefined ColorBlackFront Axle12mm Thru x 100mmFront Axle: 0.591 in Thru x 3.937 inHub/Brake CompatibilityCenter-Lock DiscISO Diameter584 / 650b / 27.5 inRim Width (internal)26 Tire Type, clincher readyValvePrestaWheel Size650b