The buying link:
dual shaft version https://retail.uumotor.com/product/8-inch-off-road-wheelbarrow-motor/
single shaft version https://retail.uumotor.com/product/off-road-single-shaft-8-inch-wheelbarrow-motor/
15 inch fat tire 100N.m 800W electric wheelbarrow motor by Lavada 
11 inch 4000w 5000w 8000w HM tubeless detached rim scooter motor by redhotbits 
80km/h 60v 2000w 11 inch electric scooter hub motor by Raisa Olesnevich 
60-72V sine wave 3000w-3500w brushless electric scooter controller by mitchell shaffer 11 inch 4000w 5000w 8000w HM tubeless detached rim scooter motor $390.00 – $415.00 15 inch fat tire 100N.m 800W electric wheelbarrow motor $175.00 60-72V sine wave 3000w-3500w brushless electric scooter controller $70.00
PWM PPM SBUS to 0-5V converter module $16.00
13 inch off road fast speed 7000W dual phase electric Scooter motor $460.00