Position: Mid drive motor. PAS sensor: Speed?? sensor. Gear sensor function: Yes. Reduction ratio: 1:21.9. 1 Mid Drive Motor. 1 Pair Brake Lever or Brake sensor. 1 Pair 44T Chainwheel (Default). 1 Set Thumb Throttle. 1 Set Speed Sensor. 1 4 to 1 Cable. 1 Wrench Tool (Free). This Bafang BBS01B mid-drive motor kit includes most of the necessary electric bike accessories, such as brake lever, chainring, thumb throttle, speed sensor, headlight, bottom bracket removal tool, and LCD display (optional). You can choose different parts according to your needs to build your own beloved electric bike. Universal fit for most bikes. The adaptable BAFANG mid-motor kit integrates seamlessly with bottom brackets with a length of 68-73 mm and an inner diameter of 33.5-36 mm and complies with JIS standards. Note: 73 mm bolts are not included. Designed to enhance mountain bikes, city bikes, recumbent trikes and more, with compatibility limited exclusively to chain-driven models equipped with disc or V-brakes. Not suitable for carbon bikes or bikes with coaster brakes. The BAFANG motor offers a maximum torque of 80Nm (BBS01). With this e-bike motor, your bike will have high performance, a longer range, and the ability to climb hills and conquer mountains with ease. This e-bike kit offers a better riding experience than a pre-built e-bike at a lower price and with significantly more power! This motor offers a choice of multiple display options. Riding data, such as speed, odometer, battery indicator, PAS level, headlight indicators, etc. Can be clearly read on the display while riding. You can choose a display based on screen size, color, and additional features. EKD01 and VD04 can setting without progamming cable. The BAFANG motor has been equipped with a soft start function that regulates speed according to the pressure on the throttle. There are also speed limit settings for both pedal-assisted and electric modes. The improved XT60 connectors for the battery reduce the risk of poor contacts, and the connectors for the headlights ensure easier and more precise connections. Experience the BAFANG mid-motor kit, engineered for high torque and speed, offering powerful yet smooth power for urban riding or off-road adventures. Engineered for reliability, this motor provides a smooth and comfortable riding experience, suitable for all rider levels, from beginners to experts!