- The most powerful and reliable Mid Drive Kit on the market
- Optional Luna's exclusive spacer kit for easier installation
- Complete redesign of the BBS02 series
- No technical knowledge necessary to install
- Water resistant
- For 48v and 52v batteries
- Watch Luna BBSHD Installation Video Here
- Read Luna BBSHD Manual Here
- Read Mid Drive Kit Install: PART 1 - PART 2 - PART 3
- Tons of of build reports on different bikes HERE
- Watch the BBSHD uphill ride video HERE
- Watch the unboxing video HERE
Regarding the BBSHD and Legal Street Use
Our drives come factory programmed for under 750w which makes them street legal in most states.
If you do choose to change the factory limits to use this on an off-road vehicle, we suggest you also buy a programming cable but be aware of the legality in your state..
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.
The BBSHD can be mounted in a wide range of bottom brackets from 68mm to 120mm. To pick which motor works right for you: please see this guide. For most applications you need the standard size (68mm), and can even go a few millimeters over the usual limit of 73mm with standard by using loctite on the axle instead of the second lockring.
If using a 100mm fatbike motor on a regular bike (73mm) some additional spacers may be needed and can be bought 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 collection of build reports you can scroll through.
Which Options?
Here is some help picking which options you have available during check out.
Battery Choices
All the batteries listed as options are excellent choices for this kit. We have picked our most popular batteries as kit options and have made them available for easily selection.
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 48v or 52v battery made with Panasonic PF or GA cells for the best fit for performance and range.
Battery dimensions are on each separate battery listing. We highly recommend making a cardboard mockup of the battery before purchasing to physically see if it will fit in your frame.
The Gearsensor
The Gearsensor is a $40 add on accessory that automatically senses you shifting when you change gears and cuts the motors power for a fraction of a second resulting in a smooth shift. Now with optional Gear Sensor...get almost the same BBSHD kit as some sale branded the "E-rad" at a greatly reduced price. This kit will come with an extra connector so you can add the gear sensor now or later without losing your e-brakes. We highly recommend the gear sensor upgrade which will give you butter smooth shifting.
Here is a link to the install guide on the Gear Sensor. This gear sensor is very popular option because before luna, only a few sellers were able to sale this and sold it at a huge mark up.
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 does not come with brake sensors, you can select the brake levers option made for standard cable actuated brakes.
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.
Chain Ring Options
The Bafang comes stock with a 46 tooth chain ring option which works great, but is heavy and some consider it ugly.
You can upgrade chain rings to something with a smaller tooth count which will give you lower gearing and a few less mph of top speed but much more torque. Also the Upgrade chainrings are lightweight aluminum and look "blingy"
There are a number of different chain ring options which can get confusing.
If you want an easy choice, we recommend the Luna 42 tooth aluminum chain ring. it looks better and is lighter than stock with lower gear ratio, but is only $40 option. Read more about it here. This ring you can interchange to a bigger gear like in the picture above,so you can go from 42 to 52 tooth for road speed freaks.
For more bling you can go with the Luna Eclipse (usually back stocked) or the Lekkie 42 tooth, both awesome but more expensive options.
The Luna Mighty mini is excellent for single track riders and turns the BBSHD into an off road monster, while loosing only about 4 mph in top speed. We also highly recommend this option.
All these chainrings have different offsets which effects your chain line which can cause you to lose a few gears when shifting. If this is a concern, for the chainring with the best offset and therefore the best chainline go with Eclipse, this will be most likely to let you use all the gears. Regardless of which ring you pick, when you upgrade chain rings we throw in the stock chain ring as well so that you can try both.
In reality its something you should not worry to much about, most chainrings will be compatible with most bikes. Usually when there is a compatibility issue it is with a fat bike. Since when you go with an upgrade chain ring, you will also get the stock ring, you will have back up in the off chance you do have compatibility problems.
Watch our video on different chain rings
More information on chain ring selection. (Also check out the BBSHD wiki for some basics of chainring choices.)
Here is a link to an independent review of the Luna Eclipse chainring.
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.
Pick your Bottom Bracket Size
The BBSHD comes in sizes made to fit the size of your bottom bracket. Please measure your bottom bracket before ordering. We have both in standard sizes (68-73mm), wide and fat sizes (74-100mm) and extra fat (100-120mm). Please note if a size is temporarily sold out the option may be autohidden until restock.
If in doubt about your sizing read this guide. If your bottom bracket shell is slightly longer than usual (for example 75mm) You can still use the standard motor. At worst you would just not use the second lockring which just acts as a jam nut and instead use blue Loctite. Same thing if your motor is a few mm above 100, you would NOT need the extra fat motor. You often can make a larger motor work with spacers but you do not need to go up a size if it is only a few millimeters difference.
Luna highly recommends the install helpers for your first time install so that you can size your drive down in case it doesn't fit right away. Need more spacers? We sell more here
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.
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 $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.
Additional links and useful info
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Here is a link to the Luna Cycle BBSHD install video
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Here is a a link to the manual for BBSHD
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Here is a link to our forum with Build Guides for different bikes
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Here is a link to our Knowledge Base with installation resources and purchase advice
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Here is a link to the install guide on the Gear Sensor
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Here is a link to an independent review of the Luna Eclipse chainring.
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FAQ for use with our hardcase battery packs (highly recommended to read this)
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FAQ for use with our softpack batteries (highly recommended to read this)
