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QS V3 273 150mm dropout 3.5T/5T 72v 8000W Electric Bike Rear Hub Motor With 17/18/19/21*1.85inch Black Motorcycle rim.Motor Type: BLDC Permanent Magnet Outer Rotor In-Wheel HubBrand: QS MotorMotor Design: Double axle without rim (not integrated), 36 spoke holes, OD 4.2mmMagnet Height: 40mm, 16 pole pairsStator: Aluminum CoreRated Power: 8000WRated Voltage: 72V as defaultMax Speed: 130KPHKV: 11.46/12.46/13.54/15.69/17.71etc.Max Torque: approx 250N.mMax Efficiency: 86-91%Suggest Peak Phase Current: 196-245A (depend on the KV)Thermic Probe: KTY83/122 (as default, optional)Working Temperature: 70-120℃ , peak 150 ℃Brake type: Bike Disc brake, PCD6*44mm(as default)Drop-outs/Rear Fork Width for installation: 150mm Dual Hall Set with waterproof connectors10mm⊃2; Cross Section of Phase Wire (not include insulation layer)Hall Sensor Phasing angle: 120 degreeWaterproof Grade: IP54 Difference between 3.5T and 5T ,3.5T is high speed version(Speed reach 120km/h without load at 72V),5T is high torque version(Speed reach 70-75km/h without load at 72V). And if you often ride on mountain road or your e-bike will load heavy weight, then 5T is better for you.Please contact me if you want tires or front wheels.Shipping method:Expedited shipping from Greater China to Worldwide.Handing Time: 7-10 business days. Shipping and Feedback:1. Please check your name, address, and phone number is right.2. After you place a order, we will ship out your goods as soon as possible, please check the tracking timely.3. If you can't find the tracking, please let us know, we will provide a positive feedback to you.4.We will be appreciated of that you leave us a 5 star feedback if you are satisfied with our goods.5.If you have any problems with our goods, please contact us first!!! We will do our best service to help you.6.Any questions, don't hesitate to contact us.