VEX V5 Smart Motor - VEX 276-5840, 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 36:1 ratio, giving a maximum output speed of 100 rpm. Great for high torque, low speed applications such as robot arms and lifting heavy objects. VEX V5 Motor 36:1 Cartridge Red (100 RPM)