Maxxis Welter Weight tubes are engineered for aggressive riders who require durability in their inner tubes. The middle-weight tubes in our line are targeted to DH racers, dirt jumpers, freestylers, and urban riders. * Puncture resistant * .90mm thin walls Item Specifications --- Valve: Presta ISO Diameter: 622 / road / 29" ISO Width: 18 ISO Width: 19 ISO Width: 20 ISO Width: 21 ISO Width: 22 ISO Width: 23 ISO Width: 24 ISO Width: 25 Labeled Size: 700 x 18-25 Valve Length: 60 Tube Compound: Butyl Valve Core: Removable