Overseas after-sales site: Poland maintenance point. Upgrade:Upgraded IRFB3077 mosfets controller. Four riding modes:Pure electric mode & human riding model & power assistance & push models. 4 working modes can be switched at will. Easy Installation:Can be successfully installed into an electric bicycle in just a few time by only a few tools which can remove the crankset and the center shaft, as well as tools for installing this mid-drive motor. Compatible:It’s compatiable with mountain bike, road bike, racing bike ect bikes with 68-73mm bottom bracket. 48V75oW Mid Drive Motor Specification. Bafang Model:M315 MM G340.75o. C Power: 75OW Voltage:48V Controller Current: 24A Max speed with Pedal Assistance: 4_7.5km/h No Load Speed(RPM) :126±7 Load Speed(RPM):110±6 MAX Torque: 100N. M Efficiency: > 78% PAS SENSOR : Speed Sensor Reduction Ratio: 1 : 21.9 Motor Operation Temperature:-20? -45? Bafang Controller: Integrated Inside the Motor Bracket bottom length: 68mm/100mm (The bottom bracket shall be 68-73mm/100mm) Certification:CE/EN 14764/ROHS Waterproof Grade:IPX5 Net Motor Weight: 4.3kg. If you choose the battery, the battery comes with the charger. If you choose “no battery”, the motor kits do not have battery. Note: Gear shift sensor is not included. FAQ: Q: How do I know if this mid drive motor fits for my bike? A: This mid drive motor fits for the bike with 68mm (2.68inch) – 73mm (2.87inch) wide bottom bracket. The inner diamater of the bracket should be 34-36mm. We’ll send extra install accessorries for 73mm bottom bracket. Q: How do I confirm whether I need the brake levers or the brake sensors? A: If your brakes are hydraulic or you want to use your own brake sensors, you can choose brake sensors. They can connect with your brakes to work directly. Q: Can I install the motor as soon as I receive it? A: Before installing the motor, please follow the steps in the manual to connect the motor to see if the motor can work normally.