VEX V5 Smart Motor - VEX 276-5841, Mechanisms such as flywheels and arms do not need large external gear ratios if the output shaft speed of the driving motor is already close to the desired speed or torque. Therefore, changing internal gear ratios to fit specific needs allows more efficient and compact mechanisms to be designed. This cartridge has a 18:1 ratio, giving a maximum output speed of speed of 200 rpm. It is the standard gear ratio supplied in a V5 Smart Motor and is ideal for drive train applications. VEX V5 Motor 18:1 Cartridge Green (200 RPM)