BBS02 Mid Drive Kit with Mighty Mini Battery
 BBS02 Mid Drive Kit with Mighty Mini Battery
 BBS02 Mid Drive Kit with Mighty Mini Battery
 BBS02 Mid Drive Kit with Mighty Mini Battery
 BBS02 Mid Drive Kit with Mighty Mini Battery
 BBS02 Mid Drive Kit with Mighty Mini Battery
 BBS02 Mid Drive Kit with Mighty Mini Battery
 BBS02 Mid Drive Kit with Mighty Mini Battery
 BBS02 Mid Drive Kit with Mighty Mini Battery
 BBS02 Mid Drive Kit with Mighty Mini Battery
 BBS02 Mid Drive Kit with Mighty Mini Battery
 BBS02 Mid Drive Kit with Mighty Mini Battery

BBS02 Mid Drive Kit with Mighty Mini Battery

(You save $100.00)
Sprocket Size *
Display Options *
Throttle Choices *
Battery Options *
Upgrade Your Included Charger *
Add a Multimeter (Recommended)
Optional Hydro Cutoffs
Optional Programming Cable
Add Luna Tool for Installs for only $10.00
Add a Reccommended Gear Sensor
Add a Mighty Mini 30T Chainring for a Special Price!

Current stock: 0

The BBS02 750w Kit with a 52v Battery for the lowest price of just $799.95!

NOTE: This product will be shipping immediately!

Help us offer the best price on the planet on BBS02 and celebrate our Fourth Anniversary with the lowest price on a BBS02 Kit yet!

This special price includes everything you need to convert almost any bike (not fat bikes or bottom brackets over 74mm). No substitutions are allowed except for the ones offered in the product ad. 

  • BBS02 Kit
  • c961 Display ( with color display upgrades available!)
  • 52v Mighty Mini Battery
  • Basic Battery Charger

When we first created our sell direct website Luna Cycle in July of 2015 the going price for the BBS02 was $1100 by sellers who would try to convince buyers that their BBS02 was different from the next guys.  The BBS02 is still the same as it has always been two years later but now the price has fallen dramatically.

The going rate for a 700 watt hour Panasonic battery was over $1500. 

We are offering an amazing price on a conversion kit with everything you need to convert almost any bike to an electric. Please share with your non-powered friends and your slow electric bike friends.

And now it has a significantly lower price than the BBSHD making it accessible to almost anyone, at this limited low price it makes a lot of sense over the BBSHD.

This mid drive has many advantages over a hub motor kit. And at this amazing price a hub motor kit makes little sense.

  • Allows you to use your bicycle gear train
  • Easy to install (watch install video)
  • Gives you perfect weight balance since it is low and centered
  • Silent
  • Reliable
  • Plug and play

Please note this kit does require installation and installation will require you spend some time on our technical forums and on our youtube channel, because each bike has its quirks and installs can be a bit tricky the first time. 

Regarding Controller and Firmware Hot Rod

Our kit includes a factory hot rodded 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.  

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 derailleur 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 or bikes with bottom brackets over 74mm. We have the BBSHD which is 1000W nominal 1500W peak and will work with fat bikes 100-120mm bottom brackets (BBSHD located here).

We include special mounting hardware for 73mm BB. If you need this and it was not included let us know and we will send separately.

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 else's 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 Battery?

This is a 25amp Kit and includes everything you need to install the kit on most bikes except for battery (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) We especially recommend any battery made with Panasonic GA or Samsung 30q cells for the best fit for performance and range. 


Which Options?

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


Display Options

The displays are the control center and the thing to most understand is they all 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. 

c961 - Standard non-no-nonense display that has all the bare essentials. 

500c - A full color one piece mini display (read more here)  that is a $35 upgrade option. This is our personal favorite due to the minimalistic design and small footprint. 

DPC-18 - Another full color vertical two piece display (read more here) that is a $45 upgrade option.  A great display for those looking for stats and placing their dash in the center of their handlebars. 


Sprocket Options:

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

44/48/52 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 3 options you want up front.

44 tooth will give you slightly more climbing power. We highly recommend our 30T for heavy 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 to overheat your controller when running this high by keeping your motor spending fast. 

We also offer after market BBS02 Chainrings (here

(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 then 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.


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. 

This is a $19 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. 


Installation and use

How to Order the Right BBSxx Kit

BBS02 Wiring Alternatives

BBSHD Pre-Buying Questions and Answers

BBSHD Chainwheels compared

BBSHD Installation

How a BBS02 pays for itself for commuters

How to install your Bafang hydraulic disc brake sensors

Most important links on use/installation/maintenance (bookmark these links):


15 Reviews

Mat g Nov 9th 2017

Guaranteed smile on your face

This is my first e bike and it has been phenomenal! When i first got my kit, the box was all beat up thanks to ups. I contacted luna cycle sent pictures because there was damage to the motor. They sent out another one to me and im very grateful for that. The installation was a breeze but ive worked on bikes for years and have a good understanding of electronics. If you dont have any experience, watching youtube and researching will get you everything you need to know. Also the guys at luna cycle are very knowledgeable and will answer any questions you may have. I decided later on to get a lekkie bling ring 42t and it made my chainline mich better. My top speed record is 36 mph on a fresh battery, flat land, no wind, pedalling like a madman! Im sure with a bigger chainring i could go faster but 36mph on a mountain bike is scary enough. I have 700 miles on my bbs02 and it still works like new. People think im lazy since it has a motor and i use it to commute to work but i pedal 95% of the time and ive lost 20lbs. The main thing is its so fun it makes me want to ride it everywhere while my standard mountain bike sits in the garage.

intramorph Nov 3rd 2017

Awesome kit with some minor annoyances

This is my first e-bike build and the guys at luna made it super easy and affordable even. I Love the bbso2. Took me about 2 hours to install and i've never worked on a bike before.Well only when i was younger and had different bikes but this is different. Anyone can assemble this kit and put it on a bike it's easy. I would have given this kit 5 stars except for the fact that it came with a 2amp charger not three and the display had no rubber spacers that it should come with. Another issue i had was the battery and the motor came with the same male connectors and if i didn't know better i could've shorted something connecting the battery to the motor. Not a big deal though I just cut the connectors off and soldered the motor power cables directly to the battery's cradle. This made it cleaner and no wires sticking out. Everything else is just great. I easily get to 30+ mph with the bbso2. It climbs hills no problem. I live in a big city where there's always traffic jams and i love zooming passed the cars stuck in traffic. Either way I wanted to thank the guys at luna for this great kit at an awesome price and would 100% recommend this kit to anybody young or old doesn't matter. Guaranteed to put a smile on your face.
PS they made it right with me by giving me a $20 discount on their 5amp charger because it takes the 2amp one 8 hours to charge the battery. if anyone's reading this do yourself a favor and get the upgraded charger you won't be disappointed.Me personally i cannot deal with that 2amp charger so i bit the bullet and got the upgrade

Add a Review