BBS HD1000 - Bafang Mid Drive B Series

Bafang has developed a new heavy duty, high performance mid drive motor that surpasses the performance of the BBS02. The BBS-HD (Also referred to as BBS03 or BBS-X) is a 1,000W nominal, 1,600W peak output monster of a mid-drive conversion kit, now with factory options for normal 68-73mm cranks as well as wider fat bike cranks (factory order). With 160Nm of torque, 30 Amp 12 MOSFET controller, and the choice of quality built Samsung cell battery packs, this conversion kit is the most powerful universal DIY mid drive on the market.

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No pretenders

In the last year there has spawned more rehashed, re-labelled ‘new but not really improved’ versions of the BBS Bafang units that we’ve lost count. The truth is that Bafang are an assembly plant (just like every other electric bike motor manufacturer) and it is with the deepest sincerity that we would like to point out they don’t reserve the ‘special’ components for small resellers buying 100 units at a time. Instead, Bafang works with the larger purchasers to improve the models over time based on feedback from a large number of customers, from both the conversion kit market and the OEM electric bike market. If you buy a Bafang branded unit from a reputable company, you are buying the most up to date, latest spec unit available.

More torque than any other

Whilst there are higher-powered hub drive units available, nothing beats the hill climbing, wheelie-popping direct power of the mid drive. To tame the torque this kit requires the patented ‘Gear Sensor’ from Agentura REPRO (Czech Republic) by default. With other BBS units this is optional however because of the high torque of the BBS-HD, this is mandatory otherwise your transmission will be toast after 1 ride. The Gear Sensor system is easy to install and momentarily inhibits the power from the motor for just long enough to gear shift. You will need to select from 2 options (derailleur or internally geared hub) when purchasing.

Heavy Duty

The BBS-HD was originally going to be just a revision of the BBS02 with 12 ‘FET’ at only 25A. Going from 9 MOSFET (Metal-Oxide Semiconductor Field-Effect Transistor) to 12 MOSFET increased the duty capability of the unit more than expected. The downside was that the BBS02 unit (which was originally and remodel of the BBS01) uses an integrated controller which could not fit any additional FETs. That meant that Bafang and their controller supplier had to completely remodel the diecast casing to make more room and to dissipate additional heat. The result is a slightly larger unit capable of housing the new controller. Other components were also upgraded (stator, rotor, gear box). The new BBS-HD is what many enthusiasts wanted the BBS02 to be.

High drain battery options

We’ve customised 2 battery options for the BBS-HD. Both are from Samsung. The first battery is a high energy cell (Samsung 29E NCA 2,900mAh) that is nominal 48V and 11.6Ah (557Wh). This battery will take the drain of 30A without breaking a sweat and will power you over a decent range, depending on use of course. The second battery option is a high power cell (Samsung 25R NCA 2,500mAh) that is nominal 48V and 10Ah (480Wh). This battery is capable of continuous draws of up to 80A (20A per cell at 4P) making it one of the highest power options in this size, and an excellent option to power your BBS-HD kit if you’re going to be ‘hanging it out there’ regularly.

Will the NT battery fit my bike?

Sizing up your NT batter to your bike



In general there should be only one measurement that you need to complete; measuring to see if the bottom bracket is within 68mm-73mm. The internal diameter of the bottom bracket needs to be a standard threaded BSA; 33.6 - 33.9mm. Also check your bottom bracket for anything that can be in the way of the motor (such as cable gutters that are sticking out or any abnormalities). If your bottom bracket does not look like a smooth cylinder or you're not sure, please send us some photos so we can have a look. The final thing that you will need to check is if the battery will fit on your bicycle. The mid drive installation can be more time consuming than our hub motor conversion kits. We suggest purchasing our conversion kit toolkit because it contains a commonly used spline bottom bracket tool which and a crank puller (both essential). If the bottom bracket has any small defects like a bur or foreign particle in the way, you may need to use a file to smooth these out. The mid drive kit requires a very good fit and this can make it quite stiff to install, but it will fit!

Additional Info

Additional Info


Designation Heavy duty off road mid drive conversion kit
Main Use Recreation, off road
Nominal Power 1,000W
Peak Power 1,620W
Max Speed Depending on use and gearing
Max Range Up to 100km (62miles), depending on battery selection and use
Pedal Assist Levels 0-9
Handlebar Display Dillenger C965
Max Rider Weight 120kg


Battery Chemistry LiMn2O4 Lithium Ion
Nominal Battery Voltage 48V
Charged Battery Voltage 54V
Battery Capacity Dependent on selection
Nominal Battery Energy Dependent on selection
Battery Removable Yes
Battery Cell Type 18650
Cell Spec Samsung 2,200mAh (22P), 2,900mAh (29E) 2,000mAh (25R) depending on selection
Cell Configuration 13S
Built in BMS Yes
Other Features USB charging
Maximum Battery Charge Cycles 1,000 design life


Battery Height 125mm
Battery Length 360mm including cradle, 315mm without
Battery Width 82mm


Battery Charger Type SANS 48V 2A
Battery Charge Time Depends on battery selection (Ah divided by 2Ah = hours to charge from empty)


Motor Brand Bafang/8FUN
Motor Model BBS-HD (also known as BBS-03)
Motor Voltage 48V Nominal
Max Motor Power 1,000W Nominal
Drive Type Crank drive (with gear reduction)
Motor Sensors Hall sensors


Controller Brand Bafang/LD
Controller Operating Voltage 48V
Controller Low Voltage Cutoff 41V
Controller Operating Amps 30A
Controller Nominal Power Output Up to 1,620W
Controller MOSFET Tubes IRFB3077 12 FET
Controller Sensors Hall sensor


Total Weight - No Battery 4.8 kg-5.2kg (10.6lb-11.6lb)

Whats in the Box?

Bafang Mid Drive Motor 1 ~6kg - 190mm x 220mm x 140mm  
Crank Arms 2 208 x 37.5mm
Bafang Throttle 1 3 Hole Female - Cable Length 390mm
1 x Plastic Spacer
Brake Sensors (Male) 1 2 x Brake Sensors (Cable Length 510mm)
2 x Zip Ties
2 x Magnets (10mm)
Wheel Speed Sensor 1 1 x Male Sensor
1 x Mounting Bracket
1 x Magnetic Bolt (M8.15 x 12mm)
1 x Nut (M8.15 x 7mm)
1 x Screw (M2.9 x 8mm)
Positive and Negative Battery Leads 1 Cable Length 475mm
Bafang BBS 4 to 1 Connectors 1 1060mm
Fasteners 1 1 x BBS Lockring
5 x Bolts (M4.85 x 16.55mm)
2 x Bolts (M5.8 x 22mm)
2 x Crank Arm Bolts (M7.9 x 23.3mm)
1 x BBS Fixing Plate
Handle Bar LCD and Control 1 1 x Dillenger C965 LCD (89mm x 54mm) (Cable Length 350mm)
1 x Handlebar Controller (44mm x 32mm) (Cable Length 200mm)
4 x Rubber Fitting
2 x Bolts (M3.9 x 15.75mm)
2 x Nylon Nut (M3.9)
1 x Bolt (M2.85 x 12.7mm)
1 x Nylon Nut (M2.85)


Customer Reviews (2)

Brilliant, brilliant, brilliant. Review by Julian
Functions as Described
Overall Rating
I have been a cyclist for many years but was diagnosed with heart disease a few months ago. I turned my thoughts to eBikes and decided to buy this one. It is the second best thing I have spent money on after laser eye surgery. I had previously ridden a Bosch powered Trek eBike which was very good and sufficiently powered with 500W but it was a bit noisy. This Bafang unit is silent and twice as powerful, plus the major upside is that it is fully programmable via free software and a £30 cable. I didn’t get on with the factory software provided by Dillenger. One particular flaw was the amount of time the motor would continue to provide power after I stopped pedaling – this was set too high by Dillenger and it was throwing me wide on corners. I turned this down via the software and it is much better. You definitely need to modify the standard settings if you want to get the most out of this motor. Any down sides? A few small things. Firstly, the controller doesn’t know how hard you are pedaling – if you pedal harder, it doesn’t give you more power. This takes some getting used to as it is quite different to cycling without a motor. Secondly, the teeth where the battery meet the holder are knife sharp, and I managed to cut one of my fingers before I realised how sharp they were. Thirdly, the unit that Dillenger sent me was missing eBrakes and didn’t have the connection for the gear change cut-off, so I suspect that version control is not great at the Bafang factory or at Dillenger (Customer Service at Dillenger has been very good though). Other than these small quibbles, I am completely and utterly in love with this system. It makes me so happy to be back on 2 wheels  (Posted on 10/31/2017)
Outstanding productReview by Christopher
Functions as Described
Overall Rating
I bought this kit and installed it on a Scott mountain bike. I live 12.8 miles from work and I use this bike to commute. I'm not in the best of shape and I've averaged 24 mph on my commute. the power in this kit is awesome.. The shop that installed this kit was very impressed with the amount of power it had. I live in Fort Collins, Colorado and there are tons of bike trails, so it is lots of fun to use even when not commuting.. This has been a great purchase and I feel that value for this product is the best that is available anywhere. Dillinger is a great company, so happy with my purchase
(Posted on 4/16/2016)

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