source for a hub motor, legally 250w rated, capable of regen

[offGridDownUnder]

Hi,

I'm asking for what I'm asking for. I don't need to hear opinions about what you think should be, or about what I can get away with. Please take that into your own thread.

Grin sold motors in this power range before with locked clutches, but does not sell them now.

I'm looking for a hub motor for an ebike with these parameters. Mid drive motors are not useful for my purpose:

• Actually, legally meets the EN 15194 European 250w power standard. I don't want to waste money on a motor that can't actually meet this in court.
• Permits regen with the proper controller - Direct Drive or locked clutch if geared
• Rear motor with freehub
• ISO 6 bolt disk rotor mounting hole pattern on left side
• Nominal 135mm OLD mounting dimension - slight variance acceptable - for example, the Gin All-Axle is 138.5mm and that can fit most frames

Useful answers appreciated. Thanks in advance.

 

[Alex12345]

Hi,

I randomly came across this and decided to register to post a suggestion. I'm myself was looking for a low powered direct drive and found this motor, see pics attached. It's rated for 250w at 36v and I believe from looking around on Internet it comes from HIMO C20 Z20. I actually got it from conhis motor a year ago and on their site they have a pic of some ancient 250w direct drive hub, but they sent me this one instead claiming to specially source it for me haha.

I wanted to do a video review of it but didn't get to it. In any case it is direct drive ok, bigger diameter than a geared 250w, but much smaller than a standard direct drive hub. I believe it weighed around 3kg if I'm interpreting my photos correctly. It has 36 spoke holes and sits on a 12mm axle (10mm slotted) and I was able to fit it to my steel 135mm dropout after a bit of spreading. The motor doesn't have a freehub, but I took it as a compromise.

It has a very low torque of course, and conhis motor people warned me about issues of starting from a standstill, but I only use it with PAS on a folding 20in recreational bike and it does provide a meaningful assistance at speed. I paired it with a 48v battery that I'm using on a different bike normally, so the motor is running at probably more like 350W at that voltage but I haven't cooked it after a year. I am using it with a KT sinewave controller and it runs fairly quiet although regen makes it more noisy. Maybe with a more tunable controller, with correct offset angles and everything, the motor could be smooth on regen as well.

Anyway, hope this helps, let me know if you have any questions.