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BAFANG BBS02B 48V 750W Mid Drive Electric Bike Motor Ebike Conversion Kit Mid-Mounted Engine for Mountain Bike Road Bicycle with Optional 48V 17.5Ah 18Ah and 48V 20Ah Battery

4.5 4.5 out of 5 stars 583 ratings

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500C color display

Brand BAFANG
Voltage 48 Volts
Horsepower 750 Watts
Item Weight 4.3 Kilograms

About this item

  • [ Two riding mode] --- Electric bikes & pedal bicycle, faster traffic & physical exercise can be achieved at the same time. A not bad choice for cycling enthusiasts and those who do not want too fast traffic to transport or travel. 750W is the most cost-effective in the BBS series, providing suitable power. The max speed is up to 55km/h, maximum torque of 120 N.m.
  • [ Various Options ] --- ①13 kinds of LCD displays, 8 kinds of batteries and 4 kinds of chainwheels for you to choose. ② The brake levers is default, it can change to brake sensor if you tell us before shipping. ③ Gits: 6V Front Light, Install Wrench, Crank Remove Tool, XT60 Port Battery Connector Cable, Install Accessories for 73MM Bottom Bracket, 36V 250W Stickers, Cable Ties, User Manual, White Gloves, Battery Bag --- Optional (Only For Downtube Battery).
  • [ Comptaible Standard JIS ] --- Fit a standard JIS 68 - 73 mm bottom bracket, please see the installation image carefully. Suitable for mountain bike, road bike, commuter bike etc.
  • [ Easy Installation ]--- All necessary mounting accessories are included. The display isn't included if you choose No display options. The battery is also optional. Can be successfully installed into an electric bicycle in just a few time by only a few tools which can remove the crankset and the center shaft, as well as tools for installing this mid-drive motor.
  • [Warranty]--- 1 year warranty and US maintenance service and technical support. If there any issue with it, don't hesitate to contact us, and we will response and solve it within 24 hours. Your satisfaction is our top priority.

From the brand


Product Description

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Pls kindly download the Compatibility Guide file to confirm the size before order.

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Bafang Mid Drive Motor

Powerful and perfectly integrated - The compact mid-motor shines with a high cost-performance ratio – 750W rated power output and 120Nm of max. torque, perfectly suited to mountaun eBikes. The max speed can reach to 55km/h.

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Product information

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Additional Information

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Customer reviews

4.5 out of 5 stars
4.5 out of 5
583 global ratings

Customers say

Customers like the performance, ease of installation, quality and noise of the electric motor. For example, they mention it's amazing, more than powerful for regular use and that it'll fit their bike. That said, some say it'd be a fantastic kit for a DIY installer.

AI-generated from the text of customer reviews

33 customers mention28 positive5 negative

Customers find the installation of the electric motor to be straightforward, easy, and fun. They also say it's a fantastic kit for the DIY installer, making monster hills really easy.

"...the kit (and battery) arrived quickly, was complete and relatively easy to install, the customer service was excellent, and the bike..." Read more

"...The install was pretty straight forward as well, I need to finish up some cable management with better routing, more zip ties, etc...." Read more

"...Second, the installation went smoothly. I ordered the special wrench, which definitely contributed to the ease of installation...." Read more

"...All parts were in the kit and really high quality. The install went without a hitch. I did watch dozens of YouTube videos for help...." Read more

32 customers mention27 positive5 negative

Customers like the performance of the electric motor. They mention that it runs great, is more than powerful for regular use, and is suitable for hilly terrain. The setup was simple, and the unit worked flawlessly. Customers also say that the bike is fast and quiet.

"...I have taken it for only a few short rides, and it has plenty of power to really get you going...." Read more

"...Fast enough for me. The power, torque, is incredible over a 500/750w hub motor. My son couldn't believe how fast it got up to speed from zero...." Read more

"...ridden on the road so far, as winter weather set in, but it is plenty fast enough. Also, don’t think you have to have disk brakes...." Read more

"Omg, this motor is amazing!! Easy conversion, found all the info I needed to install this on YouTube...." Read more

23 customers mention20 positive3 negative

Customers like the quality of the motor. They say it's a very good product, with incredible power and torque. They also say it is a nice kit and an excellent mid-motor ebike kit. Customers also mention that the end product is cool and solid.

"...From there, it went smoothly.This motor is very strong. On flat ground, I can cruise along at 35mph (56 kmh) with moderate pedaling...." Read more

"...That said, the end product is definitely cool - like having an on-demand tailwind!" Read more

"...Fast enough for me. The power, torque, is incredible over a 500/750w hub motor. My son couldn't believe how fast it got up to speed from zero...." Read more

"...All parts were in the kit and really high quality. The install went without a hitch. I did watch dozens of YouTube videos for help...." Read more

6 customers mention6 positive0 negative

Customers like the noise level of the electric motor. They say it's super quiet and powerful.

"PROS:* Fast as hell* Quiet* Easy to mount if your bike is a willing host...." Read more

"...It's amazing to have your bike with super power and no noise...." Read more

"...Overall i like the BBSHD more because it’s quiet, but this one is 200$+ cheaper and has like 90% of the performance." Read more

"...My bike is fast and quiet, I did purchase a 52volt battery pack which makes the bike fly." Read more

3 customers mention3 positive0 negative

Customers find the Trek's low gear suitable for hilly terrain. They say the motor allows them to climb hills that they otherwise wouldn't be able to. Customers also say the electric motor has no issues running through rough terrain and uphills.

"...In the Trek's low gear, it allows me to climb hills that I otherwise wouldn't be able to...." Read more

"Powerfull mid drive motor. Suitable for hilly terrain. It's amazing to have your bike with super power and no noise...." Read more

"...Let me tell you, this electric motor had no issues running through rough terrain and uphills...." Read more

3 customers mention0 positive3 negative

Customers are dissatisfied with the battery size of the electric motor. They mention that it is very heavy, adds a lot of weight to the bike, and is unnecessarily bulky.

"...Batteries are very heavy.The hardest part of the installation was deciding how to tie up the extra wiring...." Read more

"...Keep in mind my wife only uses the power when needed. Does add a lot of weight to the bike that is clearly noticeable when lifting it...." Read more

"...party manufacturers are sparse and expensive - The throttle is unnecessarily bulky, works as an on-off switch rather than a true throttle,..." Read more

Well worth it
5 Stars
Well worth it
(EDIT 8/2/2020: The photos display in a different order than loaded. Photos 8, 9, and 10 that I refer to appear for me as the 1st, 6th, and 4th.)In summary, the kit (and battery) arrived quickly, was complete and relatively easy to install, the customer service was excellent, and the bike (Trek 3500 MTB) is great -- I'm exploring everywhere now that hills and distance are no concern.I bought the BAFANG BBS02B 48V 750W 44T Mid Drive kit with the 17.5Ah battery and 500C color display and thumb throttle from Junstar. I chose Junstar because of the positive reviews for customer service. There are many factors to consider when choosing a kit configuration (type of motor and battery and display, programmibility, your bike's frame size, tires, brakes...it is well worth researching thoroughly. I will note just one factor: I chose the big battery because I wanted the range. However, for any size battery, if you ride on any rough road (let alone trails), I would recommend the rack mount. Batteries are very heavy.The hardest part of the installation was deciding how to tie up the extra wiring. The pictures show my approach. My rear brake is a Shimano V-Brake which incorporates the rear shifters so I could not use the kit's brake lever. I removed the switch from the kit's brake and glued it along with a spacer (photo 8) that activates the switch. (The vendor sells a magnetic switch alternative.)I did not like the default programming. You'll need the separate programming cable to make changes. There is a lot of discussion about configurations on the Web. The process was easy and went well. However, the throttle was very jerky. Per suggestions from the Web for a different setting, I tried but couldn't get the cable to work a second time. I tried a different PC as well as a different OS but no luck. Millie at Junstar sent me a new cable and that one did work fine. I've made a couple of throttle tweaks, which helped a little, but I rarely use the throttle.The throttle is basically either on or off. There's a slight ramp up but it's nothing like a motorcycle control. The PAS (pedal assist) works for me: I'm always in a low enough gear that my cadence is normal or higher (protects the motor) and I set the assist level to the amount of effort I want to expend. PAS doesn't work the way you first expect it to -- you'll see plenty of comments on the Web about that -- but then you learn that it does work the way you want it to.Lessons I learned:- The left and right crank arms come in differently colored packaging. However, I didn't pay attention when installing and -- natch -- got them reversed.- Going over some rough railroad tracks, the rear rack wrenched free from the horizontal mounting rods and the battery and rack fell dragging behind me. Luckily, the only damage was the scraped rack. I added hose clamps (photo 9) so that the mounts can't slide.- I was halfway up a steep trail when my motor stopped working. I feared that I had burned it out, and I headed back, hoping that it would work again after some cooling. At the bottom and still no motor, I noticed that the connector to the display was slightly ajar. Reinserting the connector was all that was needed. (The dead display was the obvious but overlooked clue.) I added an extra zip tie (photo 10) for that connection.My only wishes would be a more nuanced throttle control; and a blinking option for the headlight and taillight for daytime riding. Otherwise, I'm super pleased.
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Top reviews from the United States

Reviewed in the United States on July 29, 2020
Color: 500C color displaySize: 44T & 17.5Ah Touring rack BatteryVerified Purchase
Customer image
5.0 out of 5 stars Well worth it
Reviewed in the United States on July 29, 2020
(EDIT 8/2/2020: The photos display in a different order than loaded. Photos 8, 9, and 10 that I refer to appear for me as the 1st, 6th, and 4th.)

In summary, the kit (and battery) arrived quickly, was complete and relatively easy to install, the customer service was excellent, and the bike (Trek 3500 MTB) is great -- I'm exploring everywhere now that hills and distance are no concern.

I bought the BAFANG BBS02B 48V 750W 44T Mid Drive kit with the 17.5Ah battery and 500C color display and thumb throttle from Junstar. I chose Junstar because of the positive reviews for customer service. There are many factors to consider when choosing a kit configuration (type of motor and battery and display, programmibility, your bike's frame size, tires, brakes...it is well worth researching thoroughly. I will note just one factor: I chose the big battery because I wanted the range. However, for any size battery, if you ride on any rough road (let alone trails), I would recommend the rack mount. Batteries are very heavy.

The hardest part of the installation was deciding how to tie up the extra wiring. The pictures show my approach. My rear brake is a Shimano V-Brake which incorporates the rear shifters so I could not use the kit's brake lever. I removed the switch from the kit's brake and glued it along with a spacer (photo 8) that activates the switch. (The vendor sells a magnetic switch alternative.)

I did not like the default programming. You'll need the separate programming cable to make changes. There is a lot of discussion about configurations on the Web. The process was easy and went well. However, the throttle was very jerky. Per suggestions from the Web for a different setting, I tried but couldn't get the cable to work a second time. I tried a different PC as well as a different OS but no luck. Millie at Junstar sent me a new cable and that one did work fine. I've made a couple of throttle tweaks, which helped a little, but I rarely use the throttle.

The throttle is basically either on or off. There's a slight ramp up but it's nothing like a motorcycle control. The PAS (pedal assist) works for me: I'm always in a low enough gear that my cadence is normal or higher (protects the motor) and I set the assist level to the amount of effort I want to expend. PAS doesn't work the way you first expect it to -- you'll see plenty of comments on the Web about that -- but then you learn that it does work the way you want it to.

Lessons I learned:
- The left and right crank arms come in differently colored packaging. However, I didn't pay attention when installing and -- natch -- got them reversed.
- Going over some rough railroad tracks, the rear rack wrenched free from the horizontal mounting rods and the battery and rack fell dragging behind me. Luckily, the only damage was the scraped rack. I added hose clamps (photo 9) so that the mounts can't slide.
- I was halfway up a steep trail when my motor stopped working. I feared that I had burned it out, and I headed back, hoping that it would work again after some cooling. At the bottom and still no motor, I noticed that the connector to the display was slightly ajar. Reinserting the connector was all that was needed. (The dead display was the obvious but overlooked clue.) I added an extra zip tie (photo 10) for that connection.

My only wishes would be a more nuanced throttle control; and a blinking option for the headlight and taillight for daytime riding. Otherwise, I'm super pleased.
Images in this review
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9 people found this helpful
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Reviewed in the United States on August 28, 2020
Color: B750C color displaySize: 44T & 17.5Ah Down tube BatteryVerified Purchase
7 people found this helpful
Report
Reviewed in the United States on October 21, 2020
Customer image
5.0 out of 5 stars Like having a tailwind on tap
Reviewed in the United States on October 21, 2020
First, the delivery was weeks faster than the estimate. I'm not a Prime member, so I was prepared for a long wait, but the kit arrived in a week. Second, the installation went smoothly. I ordered the special wrench, which definitely contributed to the ease of installation. Oddly, the thing that caused the biggest problem was attaching the speed sensor magnet to a spoke. The machine screw that was supplied was a torx with a pin in the middle of it. I have a pretty complete set of tools, including a lot of specialized ones, but I didn't have a tool for that. Fortunately, I did have a machine screw that was the right size and thread pitch, but I had to shorten it. Finally, to the performance. I love this bike!
I'm a life-long cyclist, but I've broken both of my hips (in cycling accidents). My hips have deteriorated to the point that cycling under my own power results in a lot of pain. Using this in pedal assist mode allows me to get the benefit of the smooth, low-impact rotation without putting nearly as much strain on my joints. I live in a rural area with plenty of quiet, scenic roads, but also a lot of hills. With this setup, I can use a combination of downshifting and increasing the level of pedal assist to cruise up 10% grades almost as if it was level ground. I was a little uneasy about the purchase because the mid-drive motor required replacing my triple chainring with a single, eliminating all my granny gears. I settled on a 48 tooth in order to have a reasonably fast top speed, which also meant quite a high lowest gear. I wouldn't want to have to pedal this on my local terrain without pedal assist. With pedal assist, after changing the useless default controller profile settings, I'm finding the 48t was a good choice. I'm still learning what the range of the 13ah 48v battery is, but I think it will end up being 80-90 miles, riding as I am.
If you're considering buying one of these, my advice is to do as much research as you can in advance, including watching one or more of the numerous installation videos that are available, and make as educated a choice as you can. There are a lot of options. The installation, though fairly easy for me, still requires skill and knowledge. I've been building and overhauling bikes for years, and I have tools that most backyard mechanics aren't likely to. That said, the end product is definitely cool - like having an on-demand tailwind!
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Customer imageCustomer image
8 people found this helpful
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Top reviews from other countries

Translate all reviews to English
Graham F.
5.0 out of 5 stars Works awesome.. made my bike into rocket !!!
Reviewed in Canada on December 14, 2022
Jose L
5.0 out of 5 stars Muy potente.
Reviewed in Spain on January 16, 2024
Color: 500C color displaySize: 44T Chain Ring don't include batteryVerified Purchase
Stephanie Adam
5.0 out of 5 stars Super Alternative zum neuen Ebike
Reviewed in Germany on December 24, 2023
Color: C18 color displaySize: 44T & 17.5Ah Touring rack BatteryVerified Purchase
T-razor-T
5.0 out of 5 stars Easy to install, done it before.
Reviewed in Sweden on November 15, 2023
Color: 500C color displaySize: 44T Chain Ring don't include batteryVerified Purchase
RikMan
5.0 out of 5 stars Great Product great seller
Reviewed in the United Kingdom on November 14, 2023
Color: 500C color displaySize: 44T Chain Ring don't include batteryVerified Purchase