The Maxxis Welter Weight BMX Tube are engineered for aggressive riders who require durability in their inner tubes. The middle-weight tubes in our line are targeted to all disciplines of riding. About Maxxis At Maxxis International, nothing less than the best is enough. For over 38 years, original equipment and aftermarket customers have known that they can count on Maxxis for the highest quality tires, in categories including automobile, light truck, motorcycle, ATV, bicycle, race kart, trailer and lawn & garden. And their VIP Technology (Virtual Intelligent Prototyping), a process developed by Maxxis, ensures that their products continue to evolve, remaining the best in quality and performance.