Bafang brake sensor

Nes227

New Member
Region
USA
Hi guys. I'm planning on installing a bafang diy kit to my drop bar gravel bike. I'm not going to install the throttle. So I was wondering if using a gear sensor inplace of the the break sensor would be safe enough to stop the motor seeing that there will be no throttle in use. Thanks in advance.
 

Timpo

Well-Known Member
Hi guys. I'm planning on installing a bafang diy kit to my drop bar gravel bike. I'm not going to install the throttle. So I was wondering if using a gear sensor inplace of the the break sensor would be safe enough to stop the motor seeing that there will be no throttle in use. Thanks in advance.
why would you use gear sensor for your brake? 😯

there are motor inhibitor sensor for brakes, if you didin't know.
They even have one for both mechanical and hydraulic levers.
 

PedalUma

Well-Known Member
Region
USA
Welcome!
This could cause some controversy but I do not install brake levers. I also do not install throttles. You could use the magnetic type for hydraulic if you wanted on a dropbar. I recall that the gear sensor will not work in the place of a brake sensor. It is momentary, the action is different and the cables are of a different diameter.
 

Timpo

Well-Known Member
Welcome!
This could cause some controversy but I do not install brake levers. I also do not install throttles. You could use the magnetic type for hydraulic if you wanted on a dropbar. I recall that the gear sensor will not work in the place of a brake sensor. It is momentary, the action is different and the cables are of a different diameter.
wait what?
your bike does not have brake levers?

did you mean sensor on brakes?
 

Nes227

New Member
Region
USA
why would you use gear sensor for your brake? 😯

there are motor inhibitor sensor for brakes, if you didin't know.
They even have one for both mechanical and hydraulic levers.
It looks like will be a challenge getting the brake sensors to fit properly on my bike so I was hoping this would be a good solution.
 

Nes227

New Member
Region
USA
Welcome!
This could cause some controversy but I do not install brake levers. I also do not install throttles. You could use the magnetic type for hydraulic if you wanted on a dropbar. I recall that the gear sensor will not work in the place of a brake sensor. It is momentary, the action is different and the cables are of a different diameter.
Thank you
Welcome!
This could cause some controversy but I do not install brake levers. I also do not install throttles. You could use the magnetic type for hydraulic if you wanted on a dropbar. I recall that the gear sensor will not work in the place of a brake sensor. It is momentary, the action is different and the cables are of a different diameter.
Thank you
 

PedalUma

Well-Known Member
Region
USA
Can you snap a quick pic?
 

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PedalUma

Well-Known Member
Region
USA
I get out of work in an hour I will then.
Brake cutoffs make sense on a throttle bike with a front hub-drive. A PAS only bike with a mid-drive does not need them, just don't pedal and brake at the same time as with an acoustic (regular) bike. Fewer wires look cleaner too.
 

Nes227

New Member
Region
USA
Brake cutoffs make sense on a throttle bike with a front hub-drive. A PAS only bike with a mid-drive does not need them, just don't pedal and brake at the same time as with an acoustic (regular) bike. Fewer wires look cleaner too.
Wasn't sure if the motor stopped right away. I heard it goes for a bit. Just wanted to be safe. But if it stops right away I'm good. Thanks.
 

PedalUma

Well-Known Member
Region
USA
In the meantime I found these on ebay. What do you think?

Those brake cutoff sensors are perfect. There is a little smoothing lag between when you stop pedaling and this motor stops giving power, otherwise it would be too jerky.
 

Gionnirocket

Well-Known Member
Region
USA
City
Y. O.
Brake cutoffs make sense on a throttle bike with a front hub-drive. A PAS only bike with a mid-drive does not need them, just don't pedal and brake at the same time as with an acoustic (regular) bike. Fewer wires look cleaner too.
NOOOOOOOOOoooooooooo!!!
Not you too with acoustic
FG.puke.gif
 

Gionnirocket

Well-Known Member
Region
USA
City
Y. O.
Wasn't sure if the motor stopped right away. I heard it goes for a bit. Just wanted to be safe. But if it stops right away I'm good. Thanks.
The stock setting is 250ms...which isn't very long at all, but it is noticeable.
Depending on which motor you plan on using it can be set lower such as on the BBSHD. But the BBS02B acts glitchie if you drop it below 200ms so most just leave it stock
 

Nes227

New Member
Region
USA
The stock setting is 250ms...which isn't very long at all, but it is noticeable.
Depending on which motor you plan on using it can be set lower such as on the BBSHD. But the BBS02B acts glitchie if you drop it below 200ms so most just leave it stock
I'm going with the bbshd. What is a safe setting to set it to?
 

Gionnirocket

Well-Known Member
Region
USA
City
Y. O.
I'm going with the bbshd. What is a safe setting to set it to?
I'm not positive as I don't have an HD.. but I do believe that I read that the HD will accept a value of 5 (corrected)
To verify that shouldn't be too difficult to track down

One source Hackers Guide... a bit dated
 

Timpo

Well-Known Member
In the meantime I found these on ebay. What do you think?

As I asked you, what kind of brake do you have?

Those won't work if you have hydraulic.

That cutoff sensor is made for cable activated mechanical disc brakes, V-brakes, etc.
 

Nes227

New Member
Region
USA
As I asked you, what kind of brake do you have?

Those won't work if you have hydraulic.

That cutoff sensor is made for cable activated mechanical disc brakes, V-brakes, etc.
I have mechanical disc breaks with the built in shifters
 

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