THE ADVANTAGES OF THE 250W MIDDLE MOTOR KIT
World No. 1 in the manufacture of bicycle motors since 2006, the reputation of the Bafang brand is well established. Reliable, silent and terribly efficient products. OZO has been an official Bafang distributor since 2010.
The engineers at Bafang designed this engine to make it as reliable as possible, but also easy to install and maintain.
To get your idea of the installation, we invite you to watch the assembly tutorial.
Some of our customers have traveled more than 100,000Km with this engine.
We recommend this kit mainly to cyclists who want to benefit from the high power and torque of the BBS01 motor to overcome climbs and cover longer distances with less effort.
The BBS01 250W 36V crankset motor offers a torque of 80N.m, putting it ahead of all other 250W crankset motors on the market.
This torque can be increased to 110N.m with the "short transmission" option we offer in this package and the optimized mapping.
The short drivetrain pack increases torque, making it easier to tackle steep climbs and uneven terrain on mountain bikes, or to pull heavy loads on cargo bikes. The small chainring helps maintain a more efficient pedaling rhythm, reducing the risk of stalling or loss of traction, offering better torque management, smoother riding and lower power consumption.
The narrow Wide chainring ensures optimum chain grip, minimizing the risk of chain jump.
In addition to being more efficient than its competitors, it's also quieter thanks to its integrated vector-controlled controller.
The Bafang 250W crankset motor kit can be installed on 90% of conventional bikes without any modification to the existing frame.
And last but not least, this motor has been developed to retain a traditional bicycle drivetrain, so you can ride as you would on a standard bike with a 44-tooth or 4" chainring.
For mountain bikers or riders weighing over 80kg, we offer a mountain-bike-optimized version of this engine, with maximum torque of 110N.m.
THIS KIT CONTAINS
THE MIDDLE MOTOR
The Bafang BBS01 middle motor is installed in place of the original crankset.
Designed as a single unit, it integrates the motor, the controller and the pedal sensor.
Installation is easy and does not require any modification to the frame.
All the screws required for installation are supplied as standard.
THE WIRING HARNESS
All connectors are waterproof and have visual keying. You can't go wrong when plugging in.
A single cable goes up from the engine to the handlebars to connect the various accessories:
2 Red connectors for brake cuts
1 Green connector for the control screen on the handlebars (display)
1 yellow connector for the accelerator (optional)
You will need to power your BBS01 pedal motor kit with a 36V battery. All 36V batteries in our catalog are compatible with this engine.
The choice of the capacity of the battery will have to be made according to the autonomy which you wish. For example, a 500Wh battery will give you approximately 50Km of range without forcing the bike and up to 100Km depending on your effort. A 1000Wh battery will give you double the autonomy.
The second criterion to take into account for the choice of the battery will be to know where you want to install the battery on your bike.
The 36V 230Wh water bottle battery is the lightest in the range and also the most discreet
It fits in the bike's original bottle cage and its water bottle format makes it easy to carry even in a handbag.
Compatible with all our 250W motors
The 36V 500Wh to 700Wh frame batteries can be installed on the frame of the bike instead of the bottle cage or on the luggage rack.
These batteries are equipped with an electronic charge and discharge regulation circuit called BMS. The BMS also controls the temperature of the pack and the balancing of the cells.
The charging socket for OZO 36V frame batteries is Jack DC 2.1mm.
All our batteries are guaranteed for 2 years.
THREE CHOICE OF CONTROL SCREENS (display)
Black and white vertical display, entry level: Black and white display, it combines all the main functions. The original mount is intended for installation on the handlebars, but we offer an optional stem mount for the MTB. 9 assistance modes.
Compact color display: Its compact format makes it perfect for committed mountain biking. It sits on the left of the handlebars so you cannot use it if you have the derailleur lever on the left of the handlebars. 9 assistance modes.
Vertical color display: With this display, you access what is best on the eBike market. This model displays more parameters and it has an auto-adaptive backlight and a USB port for charging a smartphone or GPS while riding. 9 assistance modes fully configurable by the user: You are free to configure the 9 modes so that your assistance best adapts to your needs.
The accelerator offers the possibility of controlling the engine without pedaling.
In the form of a thumb trigger, the throttle can be installed on the right or left of the handlebars.
Note, however, that the accelerator is not approved for driving on a road open to traffic.
He finds his interest on a mountain bike to help with hill starts and obstacle passages.
The brake cut-off is an additional safety device which cuts off the power supply to the motor during braking. This is particularly very practical during delicate maneuvers in town in particular.
The brake cut-off comes in different forms:
The brake handles that replace your original handles.
The cable sensor which is installed on the brake cable and which keeps the original handles (ideal for road bikes with pressure cookers).
The magnetic sensor to be reserved for bicycles equipped with hydraulic brakes.
The derailleur sensor cuts off power to the crank motor during gear change, thus preventing premature deterioration of your transmission.
We strongly recommend it for mountain biking in which the speeds are often changed "on the fly" by two or three.
OZO has selected the best electric bicycle tires on the market for you. German manufacture Schwalbe tires have a thick anti-puncture protection and a very resistant rubber.
Their lifespan is of the order of 10,000 km.
You will find all the tires in the tires section
The battery is delivered with a 2A charger as standard.
If you want to halve the charging time, you can opt for the 36V 4A charger.
Adapter for 4-hole or 5-hole table top.
Allows the mounting of conventional transmission chainrings to the MTB standard 4 holes (4x104 BCD) or 5 holes Campagnolo (5x135) or Shimano (5x130 or 5x110).
Also offers the possibility of making a double plate assembly.
The Bafang motor is assisted by the pedal. It is the chain of your bike that will transmit all the power of the engine. It is advisable to install a reinforced chain in order to prevent the chain from breaking.
You will find reinforced chains for crank motors in the reinforced chains section.
The only specific tool you will need for installing the Bafang crank motor is the torque wrench.
Note that this tightening wrench is also used to unscrew the outer bearings of the Shimano Hollowtech bottom brackets.
Disassembling the original crankset from your bike may also require more standard tools such as a crank remover or a square axle bottom bracket remover.
You can buy all the item here HERE.
Factory mapping will be fine for urban use, but some will find it lacking in dynamism.
At OZO, we have developed an optimized mapping allowing to reduce the response times to the activation and to the stop of pedaling and to draw the full potential of the pedal motor to such an extent that the customers having compared the two mappings ask us why we do not only offer ours because the difference in performance is so obvious.
For specific projects, we can optionally create custom maps in order to configure the response times, the acceleration curve, the torque and the speed on the various assistance modes, the operation of the accelerator, etc.
ON WHICH BIKE CAN I INSTALL A BAFANG MIDDLE MOTOR?
The BBS01 crankset motor is designed to be installed on BSA standard frames, i.e. with an internal case diameter of 33.5mm (Measure A) and a length of 68mm to 73mm (Measure B)
There are two types of mounting for bottom bracket bearings, those with internal bearings and those with external bearings. In both cases, measurements are always taken at the frame level as illustrated opposite.
The measurement A corresponds to the internal diameter of the case, it is taken inside the tube edge to edge. The standard is 33.5mm. If you have more, you will need to take the appropriate adapter.
Measurement B corresponds to the length of the frame box, this is done between the two ends of the frame tube. You must have between 68mm and 73mm. If you have more (83mm, 92mm, 100mm ...) you will have to choose the BBSHD crankset motor.
To be sure that your measurement is correct, we invite you to watch the video "How to measure the bottom bracket of your bike?"