VEXpro 2 CIM 2 Stage & 3 Stage Ball Shifters - VEXpro 217-2428, This VEXpro Ball Shifter provides a battle-proven 2-speed gearbox for easy integration into any FRC robot drive-train. By utilising a ball-lock style shifter, this gearbox is capable of \'on-the-fly\' shifting even when at full throttle.The VEXpro 2 CIM Ball Shifter includes mounting for one or two CIM-style motors. Three carefully selected ratio options allow for maximum versatility.Every aspect of this transmission has been designed with size in mind. The 2 CIM Ball Shifter puts a 2-speed transmission into a tiny, lightweight form factor. The ball lock shifting method reduces the gap between the two gear reductions and allows for an extremely narrow assembly. The gear reductions were specifically chosen to reduce the overall transmission size and complexity while remaining highly efficient due to the AGMA 11 quality gears with Teflon infused ceramic coating. VEXpro 217-2428 VEXpro 2 CIM Ball Shifter 2 Stage