VEXpro-217-4249-2-CIM-Ball-Shifter-3rd-Stage-Kit-VEXpro-217-4249-P-The-VEXpro-2-CIM-Ball-Shifter-3rd-Stage-Kit-can-be-used-to-upgrade-an-existing-2-Stage-Ball-Shifter-to-a-3-Stage-version-P-P-Use-the-additional-gearing-options-to-achieve-an-even-greater-reduction-while-maintaining-the-same-robust-lightweight-gearbox-design-P-VEXpro-217-4249-2-CIM-Ball-Shifter-3rd-Stage-Kit