The new 2-speed gearbox is an evolution of the first 2-speed system Serpent invented many years ago. Now in a lighter and much more efficient form, this gearbox is easy to adjust and assemble thanks to its simple design. The gearbox features larger ball bearings (a 6x10mm and a 6x13mm) for extra durability and smoother rotation. The gears are mounted to the carriers with three small screws and come in different colors for easy recognition in your toolbox. A full range of gears is available in combination with pinions for the Centax-II clutch.