The Toecutter said:
IzzyMandelbaum said:
It doesn't seem to be impossible. A guy has done 50+ mph top speed. But it was with a road bike and he modified the bafang 750W.
Check him out. https://www.youtube.com/watch?v=OctRu79TcQ8
Assuming his road bike was fully unfared(I saw none in the video), this modified motor had to be making like 5 kW to get him to that speed on flat ground. I wonder how he did that... A rider on a road bike has as much aerodynamic drag as an efficiently-designed small car.
I've been watching his vids, but his description has:
"Motor:
•Bafang 8fun BBS02 750w 48v (1470watts at 58.8v)
•Custom controller settings with maximum throttle enabled
•52 tooth chainring (85.5km/h top speed)
•155 RPM at 58.8v (factory settings 120 RPM maximum)
Battery:
•Homemade 14s 5p 58.8v 14.5Ah battery pack capacity
•1,5 hours safe fast charge (6A 350w charger)
•70x NCR18650PF Panasonic High Current cells bare pack for better cooling
•No BMS for 100% charge & 100% performance!!
•Range: +/-26km in the city / 36km continuous full throttle with few stops
Throttle / Brake Sensor:
•Left thumb throttle adapted to road bike handlebar (almost invisible)
•Magnetic sensor for mechanical rear brakes
Dashboard:
•2x 15 watts LED headlights (two modes: normal or high bean)
•Red LED Voltmeter for battery performance monitoring
Bicycle:
•Trek Road Bike"
All his videos, you can see him keeping with moving traffic and over taking. But it's hard to determine the speed of the traffic. But the pace at which he passes regular cyclists. You can tell he's going pretty fast.