Mid-drive motor & controller 1000W (Non street legal)
Top 7 Best Mid Drive Ebike Conversion Kit - YouTube
Amazon.com : DERUIZ Electric Bike Mid Drive Motor Kit 750W Electric Bicycle Conversion Kits BBS02B for eBike Central Engine with Display(Optional) for Mountain Bike : Sports & Outdoors
1500w high torque powerful mid drive e bike conversion kit - UU Motor Webstore