36v rear hub 22 amp controller preformance fatbike

[funcruiserr]

Hi,
Im about to buy a rear hub motor from Bafang to use on a fatbike. It comes with everything I need to install it.
The motor is rated 250w and is suposed to peak at 800.
It have a 36v battery (3500mh battery - Sanyo panasonic) 18ah and a 22amp controller.

Anyone have any ide how would this system perform in hills and such as well as dragging a cart? What kind of range am i looking at

 

[wesnewell]

Bafang makes many 250W motors. It all depends on which one you have. It's only 250W, so it won't be great on steep hills if it makes it up them at all without assistance from the rider. Especially with a heavy rider.
http://www.szbaf.com/en/components/motor.html
Check the simulator for performance. They list the bafang motor.
http://www.ebikes.ca/tools/simulator.html

 

[DAND214]

What is the dropout width on the bike and is the motor the right width?

Why only 250 watt? Kinda weak for a fat bike and not much on hills.

Dan

 

[docw009]

I got a Bafang G06.350.D (350 watts) motor last year, and the controller is a KT36ZWSR 36 volt controller with a 17A rating. If you have a Bafang fatbike motor, it's probably similar to this one. The motor has a 175mm wide axle. I installed it on a cheap Walmart fatbike. Ended up replacing almost everything except the frame and seat post.

First ride was actually today. I set the controller for a 29 inch wheel, unlocked the speed limit, and the controller LCD indicates a top speed of about 20 mph in PAS 5. I suspect the meter is 10% slow, because I can only input 29 inch tires.

Edited:

Throttle only, I can do an indicated 21 mph on the flats. PAS1 delivers 50-60 watts and supports 10-12 mph with my gearing. PAS 2 is 100 watts and gets me up to 14 mph. PAS3 is 175-200 watts. PAS5 is 450-500 watts indicated. These speeds meet my expectations. It's a heavy bike at 56 pounds w/o battery.

Wattmeter says I used 2.8 aH to go a true 12 miles (my usual jaunt) tonight. With my 9.6 AH battery, that suggests 30-35 miles?

 

[dogman dan]

You'll have about 750w of power, which means you can haul a 200 pound guy up an 8% hill ok, but on 10% it will struggle. (if this is 26" wheel)

A long enough 8% hill, several miles, will tend to overheat a motor that small. You will need to pedal enough to keep the bike moving 12-15 mph to avoid excess heating.

Towing a cart, fine on the flat, not in sand. But on a big hill that motor will be in deep shit towing a heavy trailer.

You'd be better off with a direct drive, if you weigh more than 200 pounds, or will tow a heavy trailer. It won't have more power, just be much better able to cool itself when you are pushing the limits for weight.

 

[funcruiserr]

I got a Bafang G06.350.D (350 watts) motor last year, and the controller is a KT36ZWSR 36 volt controller with a 17A rating. If you have a Bafang fatbike motor, it's probably similar to this one. The motor has a 175mm wide axle. I installed it on a cheap Walmart fatbike. Ended up replacing almost everything except the frame and seat post.

First ride was actually today. I set the controller for a 29 inch wheel, unlocked the speed limit, and the controller LCD indicates a top speed of about 20 mph in PAS 5. I suspect the meter is 10% slow, because I can only input 29 inch tires.

Edited:

Throttle only, I can do an indicated 21 mph on the flats. PAS1 delivers 50-60 watts and supports 10-12 mph with my gearing. PAS 2 is 100 watts and gets me up to 14 mph. PAS3 is 175-200 watts. PAS5 is 450-500 watts indicated. These speeds meet my expectations. It's a heavy bike at 56 pounds w/o battery.

Wattmeter says I used 2.8 aH to go a true 12 miles (my usual jaunt) tonight. With my 9.6 AH battery, that suggests 30-35 miles?

Thanks for the feedback. After a bit of researching I found out this is the same motor. On the website it says rated 250-750. Im guesing the only diffrence is the controller used? I have now a 11 continues with 22 max controller.

Looking forward getting it.

 

[dogman dan]

Then in IS the dinky motor. Fine as long as you don't overload it too much.

 

[wesnewell]

Thanks for the feedback. After a bit of researching I found out this is the same motor. On the website it says rated 250-750. Im guesing the only diffrence is the controller used? I have now a 11 continues with 22 max controller.

Looking forward getting it.

Motors can't be rated 250-750W. They are only rated at one wattage. Try and run that motor at 750W for any length of time and you'll burn it up. The 750W even as a peak rating is meaningless afa the motor is concerned. It's a 250W motor. Period. Changing controllers doesn't change the motor rating. Of course if your controller is only rated at 250W, it may burn up first. The max amp rating of the controller has nothing to do with the controller wattage rating.

 

[friendly1uk]

That motor weighs the same as a bpm. I have a fat bike on route that uses one with a 48V 25A controller. At over 4kg it's not a 250w motor.

 

[funcruiserr]

That motor weighs the same as a bpm. I have a fat bike on route that uses one with a 48V 25A controller. At over 4kg it's not a 250w motor.

You know what motor i mean?

Its the same as is on the surface604 and sondors. It seems like its only the controller that differ and determence the preformance as the motor is rated 250-750w on the spec list

Ok, so I the bikeshop just finished the build. The bike just shoot away, way better than the 250 Shimano Steps bike I used to have and a very smooth riding experience.
It looks like the 250w mark on the engine is painted over and reapplyed.

The wattmeter shows 480-490 as peak and 250-280 on flat ground maks speed. Not sure why it doesent go up to 800 as seller promised. Maybe its the sanyo/panasonic battery with 3500 cells.

It came from CNEbikes