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Product Name: BBS01/02 MID Central Motor Conversion Kit for Electric Bike Bicycle Model NO.: MM G31 Type: Conversion Kits Product Name: MID Drives Motor Chainwheel: 46t/48t Voltage: 36volts Efficiency: >=80% Rpm: 70~90 Max Torque: 60~85n.M Voltage of Battery: 36V / 48V Power: 250W/350W/500W Motor: Brushless Certification: Ce Trademark: bafang Transport Package: Carton Foam Specification: ce Origin: China Product Description MID central Drive Motor conversion kit for Electric Bike bicycleMID drives are the holy grail power-providers for electric bikes. If you want to know how you can spend a lot of money on an electric bike and get the ultimate in efficiency and performance this is a good start. MID drives are not the easiest or the cheapest electric bikes to build, but can be the cream of the crop once you are out riding, especially off road, especially climbing hills or even mountains.Mid motor compare with hub motor:When compared to a hub motor, a MID drive is an elegant solution. This is because MID drives allow you to use the bike's transmission as the motor's gears, so the electric motor can run in its optimum RPM range. This translates to a happier more efficient motor and a lighter better balanced e-bike. Why a lighter bike? When going through the gears, you dont need as heavy a motor to propel you up hills without smoking, and you dont need as much battery because a MID drive is considerably more efficient than a hub motor especially when climbing.MID drives are the holy grail power-providers for electric bikes. If you want to know how you can spend a lot of money on an electric bike and get the ultimate in efficiency and performance this is a good start. MID drives are not the easiest or the cheapest electric bikes to build, but can be the cream of the crop once you are out riding, especially off road, especially climbing hills or even mountains.Rated Power 250W 350W 500W 750W Nominal Voltag 36V 36V/48V 36V/48V 48V Construction Geared Motor Geared Motor Geared Motor Geared Motor RPM 83-78 85-78 123-116 160-135 Max Torque 80 N.m 80 N.m 100 N.m 160N.m Efficiency 80 % 80 % 80 % 80% Sensor Speed Sensor Hall Sensor Speed sensor Hall sensor Speed sensor Hall sensor Speed sensor Hall sensor IP-Code IP 65 IP 65 IP 65 IP 65 Bottom Bracket 68mm/100mm 68mm/100mm 68mm/100mm68mm/100mm Chain Wheel 44T/46T/48T/52T 44T/46T/48T/52T 44T/46T/48T/52T 44T/46T/48T/52TFAQ:Q: What is the electric bike conversion kit?A: The kit is designed to transform your standard bicycle(manual pedal power)to an electric-powered by a motor and battery pack.Q: Will the conversion kit fit my bicycle?A: The conversion was designed to fit 90% of the bicycles, and you can check your bicycle fork(the two metal pieces that attach the wheel to the bicycle) to be sure. You will need at least 100mm for front wheel and 135mm for rear wheel.Q: If my bicycle meet your standard, how can I choose to install front wheel or rear wheel motor?A:A front hub kit is normally much easier to install than a rear wheel kit since you don't have to worry about gearing or derailers.When riding, the rider can easily see the front wheel and respond quickly to problems such as wheel spinning.Rear wheel drive has the advantage of better traction which is great for hills and inclines. And because the rear frame dropouts are normally stronger than the front fork dropouts, a rear wheel can handle more torque and increased power.Q: How fast will it go?A: The speed would be decided by the motor power, controller and battery spec. According to different countries rules, we provide 25km/h for EU and AU market, provide 30km/h for other market.Q: How far can I go on one charge?This varies depending on usage, your specification will affect the your battery performance and life. And mostly of the battery have a cycle life of more than 700charges.Q: Do I have to pedal to assist the motor?A: There are two kinds of modes available, throttle controller and pedal assist.Throttle controller means you use a throttle to control power and speed. To get started, simply twist the throttle to accelerate and hold it to maintain speed.Pedal assist means once you start pedaling, a torque sensor picks up your movement and power integrates seamlessly while you ride. Just pedal and go. once you use the brakes or quit pedaling, the power is deactivated and you need to pedal again (lightly) to re-activate pedal assistance.Q: How long does it take to recharge the battery?A: usually it takes 4-6 hours.Q. When should I recharge batteries?A. The battery can be charged after every ride. We do recommend that every 20th charge that you run the battery flat and give it a full charge.Q: How should I store my battery?A: Store in cool dry place, you should fully charge your battery before storing it.Q: How can I get the best battery performance and range?A: Pedal while the motor is on, start the motor after the bike is moving, use the motor mainly to climb hills, and don't use the motor while you are going downhill.Our CompanyContact: