36V 250W BBS01 Mid Drive Motor Conversion Kit 68mm Uart with 36V 20AH Battery. 1 250W Mid Drive Motor built in controller BB68mm. 1 Pair Brake Levers or Brake Sensors. If you want change the chain wheel. Please kindly leave us message. 1 Set Thumb Throttle. 1 Set Speed Sensor. 1 4 in 1 EB-BUS Cable. 36V 20AH Hailong Battery. 1 PC 6V Front Light + 1 PC Gloves1 + 1 PC Install Tool Wrench + 1 PC Crank Removable Tool + 1 set Install Accessories for 73mm Bottom Bracket + Cable ties + User Manual. Efficient Power Transfer: Bafang chainwheels are designed to efficiently transfer power from the motor to the wheels. This results in a smoother ride and better performance. Durable: Bafang chainwheels are made from high-quality materials, which make them durable and long-lasting. They can withstand heavy use and are resistant to wear and tear. Compatible with Different Bikes: Bafang chainwheels are compatible with a wide range of electric and regular bikes. This means that you can easily find a Bafang chainwheel that fits your bike. Improved Riding Experience: Bafang chainwheels are designed to improve the riding experience. They help reduce the noise and vibration that is commonly associated with chainwheels, resulting in a smoother and more enjoyable ride. How Do I Know Whether the Kit Suitable For My Bike? Bafang Mid drive kit is compatiable with mountain bike, road bike and so on. Please use a caliper to measure the dimension of your bike’s bottom bracket. The length should be 68-73mm or 100mm or 120mm. The inner diameter should be 34-36mm. And you can calculate if the chainring will touch your rear bike frame if your bike is differently designed. Please kindly note that the distance between speed sensor and magnet should be 5-8mm. Careful instllation makes your riding trip more wonderful. Before installing the motor, please follow the steps in the manual to connect the motor to see if the motor can work normally. Please DO NOT remove any connection with the power supply is on. We are specialized in manufacturing electric bike parts, such us Mid motors, Hub Motors, Controller, Lithium batteries, and DIY conversion kits. We has a good cooperative relation with BAFANG company. All the items we sell are 100% genuine and authorized. With an experienced and professional team, we have exported our products to many countries and regions around the world, especially America and Europe. Ny return that is NOT defective or NOT received in error, is the responsibility of the customer. Communication is the best way to solve problems. We try our best to make sure every customer is completely satisfied.