Speed limiter of Bafang BBSO2. Single-speed usage.

[dearme]

Motor: Bafang BBSO2, 750W mid-drive electric bike motor, 48V

few questions:

1. is it possible to request the motor without the speed limiter from aliexpress? what would be the maximum speed?
I am aiming at the 50-60 kmph speed..

2. Is it a good practice to install this motor on a single-speed bicycle?
I am planning on using the motor to drive to my work. The road has no hills, no bumps. Just a straight path.
There seems to be an issue with this motor - it cannot detect gear change so the chain wears out more quickly... so - maybe I don't need gears at all.. there will be less parts to break

 

[--freeride--]

Why not get a hubmotor then?

You can use it singlespeed with a BMX or small Motorcycle Chain. so there won/t be any issues in Chainwear...

 

[dearme]

Why not get a hubmotor then?

You can use it singlespeed with a BMX or small Motorcycle Chain. so there won/t be any issues in Chainwear...

I dont see myself riding BMX for a 14 km distance to work + 14 km from work, each day!

BMXes are meant for a in-city use..
In my case - it shall be either MTB or a tourist's bike of some kind..

I was planning on using 15-20 Ah battery pack - either LiFePo4 or Lithium.. But the current issue that concerns me the most if the speed of this motor. As I said - it should be around 50 kmps or possibly a little more. Will the speed limit removal help it or not..

 

[silence]

Why not get a hubmotor then?

You can use it singlespeed with a BMX or small Motorcycle Chain. so there won/t be any issues in Chainwear...

I dont see myself riding BMX for a 14 km distance to work + 14 km from work, each day!

Perhaps he was talking about BMX chain? :wink:
Usually a half-link one and quite sturdy.

 

[Tom L]

Motor: Bafang BBSO2, 750W mid-drive electric bike motor, 48V

few questions:

1. is it possible to request the motor without the speed limiter from aliexpress? what would be the maximum speed?
I am aiming at the 50-60 kmph speed..

Not sure about aliexpress but other vendors do offer it unlimited.
You won't get much more than 50km/h on a geared bike.

Motor: Bafang BBSO2, 750W mid-drive electric bike motor, 48V
2. Is it a good practice to install this motor on a single-speed bicycle?
I am planning on using the motor to drive to my work. The road has no hills, no bumps. Just a straight path.
There seems to be an issue with this motor - it cannot detect gear change so the chain wears out more quickly... so - maybe I don't need gears at all.. there will be less parts to break

No not really. The advantage is that you can drive through the gears and select the appropriate range for the motor. Your application screams "direct drive hub".

 

[Hero_004]

No not really. The advantage is that you can drive through the gears and select the appropriate range for the motor. Your application screams "direct drive hub".

Tom is right, the hub will be the best way to go for what you're looking for, my 9C 2807 hub motor will get me up to 56km/h on 50V of LiPo, my BBS02 will get up to 43km/h and it had a 50km/h speed limit.

 

[dearme]

No not really. The advantage is that you can drive through the gears and select the appropriate range for the motor. Your application screams "direct drive hub".

Tom is right, the hub will be the best way to go for what you're looking for, my 9C 2807 hub motor will get me up to 56km/h on 50V of LiPo, my BBS02 will get up to 43km/h and it had a 50km/h speed limit.

can this motor work as am amplifier for pedaling?
or it's an throttle-only drive.

Also, another concern - I really like befang motor for it's stealthiness.. Hub motors (> 250W) are usually really easy to notice which is not good idea for EU countries where 25 kmph limit exists

 

[Hero_004]

Yes it does amplify pedaling power but it won't get you as fast as you want to go.

 

[cal3thousand]

If you are going to use an MTB, why the aversion to gears?

Any decent MTB is going to have the gears already, just use them. Only situation I would see using a single speed on a mountain bike or tourists bike is with a fast hub motor. You're not using a fixie bike are you?

 

[maxwell92036]

I agree not using gears with the mid drive motor seems kind of pointless but a mid drive motor has better weight distribution and it makes it easier to fix flats. Just leave the gears on and just use one speed!

 

[r3volved]

I single speeded my gng since I was never shifting anyway...I just keep two cogs on my rear hub that I manually swap for street(speed) or track(torque) use and run a 1/2 x 1/8" interlock chain.

I've had next to no headaches now, than when I was putting everything through a derailleur and 8spd chain that I was never really utilizing anyway.

The only problem I had was that I bought a shitty drive chain at one point and it blew twice within a week so it got scrapped. The shadow conspiracy interlock is beefy and awesome

 

[maxwell92036]

I guess that single speed usage sort of makes sense since it is easier to change or fine tune gearing vs a hub motor.

 

[Supertux1]

I've got a bike with a Bafang BBS02 and a bike with a MAC10T hub motor.

The entire purpose of the Bafang BBS02 is to allow you to use your bikes gears to get the most efficiency, dynamic torque and speed out of your setup. I've got mine on a 10 speed rear cog and it's pretty awesome, although I do worry about chain wear.

It's hard to go 50kph+ (31mph) and not be noticed as an eBike no matter where you put the motor.

At those speeds you should be putting the pack in the frame for balance and that's a giveaway too. (If you're not putting the battery pack in the frame (eg on a rack) and going that fast, it doesn't matter because you're going to die when your rear washes out in a fast turn. )

If you don't have a lot of steep hills and have a relatively flat and fast straight commute, you might like a MAC 8T with frame mounted battery from EM3EV. Don't buy anything from aliexpress.

To your original question, if you get a BBS02 with a speed limit built in, just program the wheel size to smaller than what you actually have.
Your speed display will be all wrong but you will be going faster.

 

[luterra]

If you have a 26" bike and set the wheel size to 16" and the units to kph, the readout will be nearly accurate as mph, and the speed limit will be a nearly unattainable 40 mph.

 

[tahustvedt]

My BBS01 can be set to 50 km/h PAS limit. The 40 km/h stock throttle limit is equal to unlimited on mine.