BafangRear Hub Motor

Wac222000

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Hi I have a Bafang rear hub motor which is restricted to 15 mph and would like another 5 mph to help me get over the hills. Does anyone know how to derestrict it to get more speed. Someone said you can get a tuning cable but mine is a 9 pin and don’t seem to find any
 

HumanPerson

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you could try eggrider display which allows you to get into the controllers settings.

i'm not sure if it can be used for a bafang hub motor though :unsure:
 

m@Robertson

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Hi I have a Bafang rear hub motor which is restricted to 15 mph and would like another 5 mph to help me get over the hills. Does anyone know how to derestrict it to get more speed. Someone said you can get a tuning cable but mine is a 9 pin and don’t seem to find any
The hub motors' top speed is usually governed in the display itself. Everything you can do is done in the display settings. the programming cable thing is for mid drives and thats a different kettle of fish. So, you need to be able to get into your display's settings, which usually involves some kind of multiple-keypress-and-hold kind of thing to let it show its setup screen. What is your display? A picture might be enough to tell us what we need to know.

Unfortunately, additional speed is not going to do much other than to help get you a running start. You won't actually have any more oomph (torque) to make the motor spin harder. It'll just spin faster so you have a higher start speed at the bottom of that hill you just ran up to.

Also, its hard to say whether or not your bike has any more to give. Lets back up a bit to explain using more commonly understood automotive terms: Think of your battery voltage as horsepower. Think of your controller amperage as torque. Horsepower helps your top speed, but torque helps give you grunt off the line. There is an old saying: Horsepower helps sell cars, torque helps cars win races.

With that out of the way, what is your battery voltage? If it is 36v, you may be close to your peak speed already. Especially if you have smaller, 20" wheels on say a folding bike. A 26" fat bike with a 48v battery and an average weight rider can get up to maybe 23-25 mph. Thats with tall 4.5"+ tires.

To get up a hill though, with a hub motor, without losing that head of steam, you need more torque to keep that motor grunting up the hill. Thats where your real improvement will come going up a hill. Unfortunately upgrading your controller - and probably your battery voltage to get hold of a pack that can handle the bigger amp draw - is probably a little more DIY upgrading than you care to undertake to get a satisfying result.
 

Wac222000

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The hub motors' top speed is usually governed in the display itself. Everything you can do is done in the display settings. the programming cable thing is for mid drives and thats a different kettle of fish. So, you need to be able to get into your display's settings, which usually involves some kind of multiple-keypress-and-hold kind of thing to let it show its setup screen. What is your display? A picture might be enough to tell us what we need to know.

Unfortunately, additional speed is not going to do much other than to help get you a running start. You won't actually have any more oomph (torque) to make the motor spin harder. It'll just spin faster so you have a higher start speed at the bottom of that hill you just ran up to.

Also, its hard to say whether or not your bike has any more to give. Lets back up a bit to explain using more commonly understood automotive terms: Think of your battery voltage as horsepower. Think of your controller amperage as torque. Horsepower helps your top speed, but torque helps give you grunt off the line. There is an old saying: Horsepower helps sell cars, torque helps cars win races.

With that out of the way, what is your battery voltage? If it is 36v, you may be close to your peak speed already. Especially if you have smaller, 20" wheels on say a folding bike. A 26" fat bike with a 48v battery and an average weight rider can get up to maybe 23-25 mph. Thats with tall 4.5"+ tires.

To get up a hill though, with a hub motor, without losing that head of steam, you need more torque to keep that motor grunting up the hill. Thats where your real improvement will come going up a hill. Unfortunately upgrading your controller - and probably your battery voltage to get hold of a pack that can handle the bigger amp draw - is probably a little more DIY upgrading than you care to undertake to get a satisfying result.
 

Wac222000

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m@Robertson

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You are going to have to learn what display model that is, and hunt down an instruction manual on the web somewhere. Its not something anyone is going to know who hasn't worked with that exact display before. If you have a 250w motor and a 36v battery, there may not be much room to grow whether the display is restricted or not. A low-wattage, low-voltage motor can only do so much.
 
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Hi I have a Bafang rear hub motor which is restricted to 15 mph and would like another 5 mph to help me get over the hills. Does anyone know how to derestrict it to get more speed. Someone said you can get a tuning cable but mine is a 9 pin and don’t seem to find any
Unfortunately, anytime hills are involved we highly recommend no less than a 750W motor to be able to make it up them without pedaling being required in addition to what the bike is capable of on its own when less than 750W.
 
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