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US stock:20*4.0inch 170mm dropout 72v 3000W Fat Bike Kit with Sabvoton 80A waterproof controller. Packaging list for the electric bike kit 3000w 72v: 1.Engine: 72v 3000w Electric bike rear hub motor wheel 170mm Dropout 2. 20x4.0 Fat bike alloy rim with tire3. Two alloy brake levers 4. Full twist throttle 5. 72V 80A Sabvoton waterproof controller/Dual mode 72V 80A waterproof controller6. UKC1 color display 7. 7-speed gears(freewheel) 8. Bluetooth 9. Alarm&lock 10.1 to 4 waterproof cable Product Details 1.72V 3000W Motor and Fat Bike Rim ·High quality, competitive price ·Easy to install ·Low noise ·High torque, Safe collocation Dropout width: 170mm This product is a conversion kit for electric bicycles. It includes a 170mm hub motor wheel, a Sabvoton 80A waterproof controller, a display, a throttle, a brake, an alarm and lock, a waterproof cable, Bluetooth and a 7-speed flywheel. This kit is designed for use with Li-ion batteries with a voltage range of 48V-72V. Materials used in kits include aluminum, aluminum alloys and steel. This product is manufactured in China and is in stock in the U.S. warehouse, so we can arrange shipment to you faster. Shipping and feedback: 1. Please check your name, address, and phone number is right. 2. This E-bike kit be shipped from USA Los Angeles Warehouse by FedEx Economy shipping, it takes about 2-8 business days . 3.After you place a order, we will ship out your goods as soon as possible, please check the tracking timely. 4.If you can't find the tracking, please let us know, we will provide a positive feedback to you. 5.We will be appreciated of that you leave us a 5 star feedback if you satisfied with our goods. 6.If you have any problems with our goods, please contact us first!!! We will do our best service to help you. 7.Any questions, don't hesitate to contact us.