Bafang BBS02 Mid Drive eBike KIT
Bafang BBS02 Mid Drive eBike KIT
Bafang BBS02 Mid Drive eBike KIT
Bafang BBS02 Mid Drive eBike KIT
Bafang BBS02 Mid Drive eBike KIT
Bafang BBS02 Mid Drive eBike KIT
Bafang BBS02 Mid Drive eBike KIT
Bafang BBS02 Mid Drive eBike KIT
Bafang BBS02 Mid Drive eBike KIT
Bafang BBS02 Mid Drive eBike KIT

Bafang BBS02 Mid Drive eBike KIT

$599.00 $450.00
You save: $149.00
Sprocket Size *
Optional Display Upgrades *
Throttle Options *
Ebrake Cutoff *
Add Hydraulic Brake Sensors
Add a Gear Sensor
Make it a kit by adding a top grade PANASONIC battery
Add a 5.5mm Smart Charger for your Battery (not included)
Add a Mighty Mini 30T Chain Ring
Add Custom Machined Install Tool

Current stock: 0
  • Upgraded controller with extra beefy 3077 mosfets to handle extra power
  • We offer a FREE programming of your firmware setting to turn your Bafang BBS02 into a hot rod
  • Affordable and powerful mid drive conversion kit
  • 25 amp upgraded mosfets controller  (up to 1300 watt with 52 volt battery)
  • Lightweight (~10 pounds) and very powerful
  • Turn almost any bike into a high-end mid drive ebike for very affordable price

Luna Cycle has proven itself to be the premier BBS02 dealer offering the best selection of kits with the best features at lower prices than you can find anywhere.

We cover most repair parts for all versions of the BBS02 past and future. 

This is the highest performance version of this drive with upgraded firmware (custom made for Luna Cycles) and a controller with upgraded 3077 mosfets designed to handle the higher power this upgraded firmware will give you. 

Do not let another USA dealer snow job you, there is no better or newer or faster BBS02 kit available.   

This price is for knowledgeable builders and people willing to do their homework before they buy.  If you fix things on your own bike and like tinkering then this kit is fine for you. It is a plug and play kit with everything you need except the battery and charger. If you have not installed an ebike kit on a bike before we recommend that you read the installation manual before you make the decision to buy this drive unit.

We are an American company located in Southern California. Many other people who offer this type of pricing are in China and the problem with China is the shipping costs tend to be very high (around $80 for the drive unit and much more for batteries). If you think it's expensive to receive something sent from China, wait until you try to send something back to China. When you buy an ebike product from a non-reputable vendor in China you are basically getting it without a warranty. 




Regarding Controller and Firmware Hot Rod

Our kit includes a factory hotrodded controller different than most BBS02s purchased from China. The original BBS02 controller also had weak mosfets that would blow out easily when too much load was put on the system. We have had all our drives modified at the factory with more expensive and robust 3077 mosfets to make the controller handle more power without overheating. This makes it possible for us to change the firmware to a set up that allows you to utilize all peak 1300 watts this drive is capable of. We still recommend that you use a lot of common sense and keep your motor spinning fast by shifting down and keep your motor revving high when climbing. All electric motors prefer to spin at high rpms and you should keep this in mind and baby your bafang. We do not cover blown controllers under warranty. So if you overheat your controller by not following our operation guide, you will have to replace it. 

The way this kit comes from the manufacturer it is very solid and hard to burn out. It is also difficult to get the kit’s maximum 1300 watts of performance which you can do by upgrading the firmware. We sell our kits to experienced builders with the firmware already upgraded. (Click here for the firmware programming guide)

We recommend  you get the optional programming cable so you can tweak your own program settings. Their are many online guides which will help you do this. 


BBSHD is the Heavy Duty version of this same motor, overbuilt for extra durability and power.

The BBS02 is a better option over the BBSHD in these cases:

  • When cost is a factor
  • When you do not need the extra power the BBSHD offers
  • When you do not need extreme hill climbing power
  • When you want a lightweight build
  • When you want your drive to be 100% street legal

Kit includes:  

  • Bafang mid drive motor 
  • 25 amp controller (built into drive system) with upgraded 3077 mosfets
  • Hot rod programmed for ultimate performance
  • Bottom bracket compatible with 68-73mm bottom brackets (most standard bikes)
  • Your choice of 44t, 46t, 48t, or 52t chain ring (depending on stock level)
  • Thumb throttle 
  • Ebrake handles which cut off  the motor when depressed
  • C961 Display

Read our complete review on this kit here

Watch ride video here

Which Bike?

The Bafang drive mounts in place of your current bike's bottom bracket and replaces your bike's crank set and front derailler if you have one. 

Your donor bike must have 68-73mm bottom bracket width. That means this kit will bolt onto almost any bicycle. But not fat bikes. We have the BBSHD which is 1000W nominal 1500W peak and will work with fat bikes 100-120mm bottom brackets (BBSHD located here).

Many people have found that the Bafang can actually be mounted to many types of trikes, which can be fun since many trikes are not good candidates for hub motor kits.

Maybe you have an old donor bike laying around you want to convert, or maybe you are wide open to which bike to buy and install this kit on.

If you are also shopping for a bike to install this kit, that is perfect. We recommend you pick a bike that is known to be compatible with this drive and has no known issues. Ideally a build report has been written on our builder forum so that you can follow step by step someone elses building steps.

Here is a post on our builders forum  with a picture  collection with links to  build reports you can quickly  scroll through.

Which Options?

When you buy your drive the following info will help you pick which options are right for your bike.

Battery Options

This Kit includes everything you need to install the kit on most bikes except for battery and charger (which you can add at discounted price) all the batteries listed in the add as add ons are excellent choices for this kit.  We have picked our most popular batteries as kit options and have made them available at a discounted price.

However you are not stuck to just these choices. 

All of our 48v (see here) and 52v (see here) batteries are compatible with this kit as well if your looking for something larger in capacity. (more amp hours = larger size and farther range)

Display Options

The displays  are our ebike dashboard and all of them display the same information (watts, battery indicator, speed, miles traveled, etc) so in essence just pick the display that you like the look of the most, since they all have the same basic functions. Availability pending on stock, see options for what is available.

  • 965 - Standard display and recommend if you dont have a strong preference for something else.
  • DPC-18 - A full color display (read more hereIf you want the fanciest best looking display this is it. (This is an upgraded revision of the popular DPC-14)
  • 963 - The smallest most discreet display...mounts by the throttle. A cult favorite. $40 upgrade price.
  • 961 - The bafang default display that is not fancy but works perfect.
  • 750c - A different take on full color display (read more here) using a nice mount system and horizontal readout.

Sprocket Options:

We offer the Bafang with 3 different options for tooth count on the chainwheel.

46/48/52 tooth

Of course your gearing will also be determined by the rear cluster on the back of your bike. 

But you need to choose which of these 4 options you want up front.

46 tooth will give you the most reliable set up that is also very torquey and better for off road hill climbing.

48 tooth will give you the middle ground.

52 tooth will give you the highest top speed (30mph) but is only recommended for street riding and you should really take care not ot overheat your controller when running this high by keeping your motor spending fast. 

(Click here to read our special care & instructions guide here)

eBrake Options

The Bafang has the option of connecting with your bicycle brakes and automatically cutting off power when the brake is tapped.

The kit will work with or without the brake sensors plugged in.

The Bafang kit comes stock with new brake handles that can replace your existing brake handles.

You also have the option of getting magnet sensors which allows you to adapt your existing brakes.  This will help with users who have hydraulic brakes the sensors are not compatible with. 

You can also choose to go with a brand new set of hydraulic ebrakes with the sensors built in. 

Throttle options

If you are not sure about this one... pick the universal thumb throttle Thumb throttles are the safest and fit all bikes.

If you like motorcycle twist throttle, our custom Luna throttles are awesome.

Programming Cable Option

The Bafang has many setting which will effect the way the power comes on especially in pedals assist mode. We highly recommend this $20 option because it will allow you to customize in the future.

Their are many great programming guides available on the bbshd online.

Luna Install Tool option

There are some proprietary nuts on the bottom bracket of the BBSHD that can be a little tricky to install without the right tool (still very easy to jerry rig something)

However the Luna install wrench was made to make this task a snap and make taking on and off your drive easier in the future (read more here). 

This is a $20 option.  Luna manufactures this kit in their shop, and makes it affordable...the Bafang install kit would cost anywhere from $65-$150 depending on which dealer you bought it from.

73mm hardware

We include hardware to fit onto a 73mm BB shell (see below)


On a 73mm BB you may not fit the outer lockring on when using a BBS02 or BBS01. You also need to use the extra included washers, and the longer M6 x 20mm bolts. Use Loctite on the threads of the axle instead of using the second lockring (which really just acts as a jam nut) (this only applies to BBS02, BBSHD has long enough axle this is not necessary)




Installation and use


How to Order the Right BBSxx Kit

BBSHD Pre-Buying Questions and Answers

BBSHD Chainwheels compared

BBSHD Installation

BBS02 Wiring Alternatives


Important - read and bookmark these links:


21 Reviews

Christopher May 30th 2018

Working well in Calgary, Alberta, Canada

Used for winter (2017) and now this spring (2018) with no issues. In the winter despite snow/ice/dirt/etc the kit ran great! Kit was straightforward to install on an old mountain bike and I can easily get up hills to/from work. There's a short steep hill (Shaganappi golf course for those who are familiar) where most people slow to a jogger's pace whereas I can easily zoom up. This is my first build & I have the stock chainring-may someday upgrade but for now it's been fine. Would definitely recommend this kit & buying from LunaCycle!

Mike Peacock Jan 24th 2018

Great results without great expenditure

I ordered a BBS02 mid drive kit from Luna Cycle in October of last year. It arrived within a few days and, since I had done considerable research beforehand, I was able to install it in a few hours. I’ve been enjoying it ever since.
I chose the BBS02, rather than a BBSHD, due to cost considerations and expected ease of mounting, due to its smaller diameter flange. For power I chose a Luna Mighty Mini 30Q, for its reasonable cost and small form factor. Another consideration was its 30A continuous BMS, which will make it perfectly adequate if I should upgrade to a BBSHD.
Initially I was considering a fat tire bike build with a BBSHD, but a test ride on a fat tire bike at a bike shop convinced me I didn’t really like the feeling of the 4” wide tires. I still wanted a little wider tire than a regular mountain bike tire so, with cost an issue, I purchased a Mongoose Hondo 27.5 plus tire bike for the bargain price of $179.95, shipping included. I knew it would be fitted with all the cheapest components, but what the hell, I knew right at the start of the conversion I was going to throw away the guts of the bottom bracket and the front derailleur. The bike came fitted with mechanical disc brakes, which helped make the conversion easy with the Bafang handbrake levers purchased from Luna. Contrary to some reports I’ve heard on Mongoose disc brakes, mine were easy to adjust and work great, with the Bafang levers installed. I’ve since upgraded the rear derailleur and replaced the twist shifter with a Shimano trigger shifter. I also replaced the 14-28 tooth freewheel with an Epoch 11-28 tooth freewheel because I was running out of gear when pedaling hard on the level. I have the 46T chain ring and I ride mostly on a paved bike path and public roads, by the way. Before installing the new freewheel I rearranged the gears for fewer shifts. See this link:
One caution: with older, cheaper freewheels, like mine, you have less ability to rearrange the gears than you would with a more modern cassette. That’s a drawback of the cheap bike which is not so easily changed.
For those who don’t know, the 27.5 plus tires are 2.8” wide, compared to mountain bike tires at about 2” wide and fat tire bike tires at about 4”wide. I think that’s a nice compromise on an e-bike, very solid, but still that nimble feeling you expect from a bike.
The bike I bought has a 68mm wide bottom bracket, which was great from a cost-cutting perspective, because it enabled me to use the BBS02. It might be a bit more challenging to install a BBSHD, which, I believe, has a bigger flange than the BBS02. I had to shim the BBS02 out slightly because the flange was hitting the chainstay, which flares out to accommodate the rear tire. I expect the BBSHD would need more shims and then probably the appropriately dished chain wheel to correct the chain line. That assumption also influenced my decision to buy the BBS02. I’d be interested to hear from anyone who’s installed the BBSHD on one of the 68mm BB Mongoose plus tire bikes, which BBSHD width and which chainwheel they used.
Would I like the extra power of a BBSHD? Sure, but for the moment I’m really loving the BBS02. One thing that has surprised me is that I’m seldom inclined to use the throttle. I expected to prefer the throttle over pedal assist, but it turns out, for me at least, it’s much more fun to pedal. I’m 68 years old and it’s great to fly at speeds I couldn’t even achieve when I was young.
At some point I will upgrade to a BBSHD. I’d be more eager to do so if Luna would make their ludicrous option available in a bare motor for upgrading. Luna, are you listening? I’m somewhat seriously considering chopping and welding my frame to mount a Bafang Ultra, which they do offer with the ludicrous option. That might make my throttle more interesting! For now I’ll just keep enjoying my bike and save my money for that eventual upgrade.
Thanks Luna and Bafang, for a great product. I’m looking forward to sampling some more. And to anyone who’s been considering an e-bike build, just do it. You’ll love it!
Mike Peacock 1/24/18

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