That BF motor is really good! I have mine running at 36V, and it pulls really well. Have been 42 kph mounted in a 20" wheel. Had same motor in a 26" wheel, and it topped out closer to 50 kph, but with less torque.
It a bit heavier than the Tongxin though, at about 3 kg.
Dunno what my range is, haven't drained the battery yet, but have gotten 35 k and battery still feels strong, so I reckon I should get 40?
The repair charge is $50 USD plus shipping. Locals can bring the bike or wheel by the shop. Obviously, for shipping the unmounted motor is best, but you can send the wheel. Our mailing address is on the website (Commerce Blvd). I assume Tongxin improved the ring as they were aware of the issue, but I don't have the details on the improvements. Stressing the motor would be a 200 pound guy going up a hill. 36 V at 10 amps is no problem. The controllers are rated at 15A. A comfortable load for this motor would draw 8-10 amps cruising on level ground.
The Stig wrote:Is there any chance things have changed now that 6 months have gone by. Any design changes? Anyone who has run the tongxin at 48v? 20A?
vendybiker wrote:The Stig wrote:Is there any chance things have changed now that 6 months have gone by. Any design changes? Anyone who has run the tongxin at 48v? 20A?
I have one 24V Tongxin and I use it on 48V/17A controller. ItÂ´s realy fast and powerful. As far as good (I have it about 1 year).
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