Maxxis Welter Weight 29x1.75-2.4’’ Tube 48mm Presta Valve RVCMaxxis 29x1.75-2.4’’ Welter Weight tubes are engineered for aggressive riders who require durability in their inner tubes. The middle-weight tubes with .8mm thick walls in our line are targeted to all disciplines of riding. These have a 48mm Presta Valve with Removable Core. Weighs only 200g.4717784040196