Ultimate 48v- 72V BBSHD Motor 3250 Watts (Peak) ASI BAC 855 Controller NXT Display
This is the fastest Off the shelf BBSHD solution in the world.
Higher Volts, Higher RPM Higher Speed !
Now with fully PAS 750c Display
Battery voltages totally swap able (48, 52, 60, 72) and now independent throttle (you set the power) full PAS
This is truly plug n play and expect RELIABLE speeds of around 45+ MPH
For international orders wil be additional shipping charge at check out.
If you want to know the performance of this take a look: https://youtu.be/42Q6uEVNmwA
Ultimate BBSHD, battery and Controller Screen –complete kit with 750c Display and Gear Sensor motor cover all included!! (
Did you ever wish your BBSHD went substantially faster, pulled harder and you didn’t have to be told you can’t buy the controller you want – shush it’s a secret?
Well thanks to a very clever friend of ours, we are the UK and EU distributor and co developer for this exceptional device.
Advanced processing and state of the art allows it to compute much faster and much more accurately than the standard Bafang unit (or any modded Bafang controller). Imagine your first media phone in comparison to the latest Iphone/Android device? – Things have moved on and these Canadian devices have not been designed with penny pinching mass market sales like the original. All of this makes your 52 V motor pull much harder and release around 15% more speed than a 50A Bafang controller and whopping 100% more power than the standard, while still using your standard display! (NB, please see our note about displays). We might add the power is designed to come in without the mechanical snapping lurch of an inferior set up.
These controller have been set up so that it can handle anything from 50 A up to 3000 W (easily within their design). This might mean a little explaining:
We have tested the BBSHD to destruction and on more than one occasion right up to 4500 Watts and learned a few things, real facts and not the odd exception.
Amps create heat, heat weakens the nylon gear and too many watts snap the pinion. So how do we get around this? Simple, know the limits but don’t get too close. Sure these are now nearer the limit, but ridden correctly (let the motor spin and don’t labour in the wrong gear), a reliable ride can still be had. At the lower volts where big amps are needed, we have capped the limit to 50A but as you increase your volts, we capped the watts to 3250 W. A ludicrous controller at 50A has 2500Watts – so does ours, but now add 10 -15% improvement through field weakening!
But here it gets even better, Change your battery and go up to 20s 72 V (any voltage form 13S to 20S, 48V -90 V) and the controller takes it (not a Bafang originated 60 V cap). Your watts have now jumped to a dangerous 4200 watts on a “hot” (fully charged battery at 84 V), so we reduce this limit to a safer 3250 W (peak), but still so much powwweeeeer!
This is recommended as a throttle only and single speed (easy to adapt your free hub to single gears) application due to high RPM and low gearing. Your bike will accelerate like a rocket and still hit around 45 MPH, depending on how you gear your bike. You can accelerate faster or have a higher top speed. We find 45 MPH is enough. Bigger explanation further down.
Because of the weakness of the Nylon gear, the use of low gears is necessary and we recommend front 42T and rear no smaller that 28T on 29er or 27.5″ wheels and 26T on 26″ wheels.
We have tested this set up thoroughly with a 250 lb rider without issues.
No need for gear changes (although in low power mode this is still very usable with PAS) as the massive increased RPM range and large rear gear allows blistering acceleration and high top speed. Because of high voltage, low amps are used to obtain more watts. For example 72v x 50A = 3600 watts compared to 52v x 50A = 2600 watts. and we all know that high amps create motor killing heat, we limit the motor o 3000 w.
A 72V system uses less power and generates less heat but makes you go much faster.
The down side? = more money for the more advance controller (advanced field weakening) and the higher cell count battery. PAS is less suitable and the motor spins much faster. Because of the higher RPM a really good chain line is really important: drastically reduces wear and stops chains from snapping.
You no longer need other gears! your weedy legs are obsolete!!
We ship the controller with three power levels.
level 1 is around 1000w and hits speeds of around 30 mph with modest acceleration (similar to a standard BBSHD) and a range of around 30 miles
level 2 is around 1900w and hits speeds of around 40 mph with good acceleration and a range of around 20 miles 9 we tend use this setting all the time,as our main settings).
level 3 is full power and hits speeds in excess of 40 mph with blistering acceleration and a range of around 12-15 miles (we use this button like a Turbo, its too much for day in day out riding).
Order for USA (In stock no UK shipping) please go to: https://electroncycles.co.uk/product/asi-bac-800-36v-90v-foc-90a-peak-bbshd-hot-rod-controller-usa-orders/
750C Display 48-72b switchable, display. Rock Solid reliable with updates required or leaky case.
Full PAS function is available with a choice of up to 3 = 5 – 9 levels.
ONLY OUR 750c display will work for PAS without additional firmware.
Quick display demo: https://www.youtube.com/watch?v=Q3jwI4axDHw
Controller Feature Set
- FOC (Field Oriented Control)
- improved torque throughout the rev range
- Higher RPM compared to the stock controller on 52V and especially on 72V (Up to 8000RPM)
- Silky smooth throttle control and responsiveness.
- Improved efficiency due to FOC algorithm, premium internal components within the controller (like the mosfets) which increases efficiency while reducing heat losses
- Automatic sensored to sensorless transition which gives you addition 5% top speed and better performance
- Supported displays are 750c
- Includes 3D Printed Cover
- Usable voltage is 46V-92V
- Programmed for 3250W, # of Assist levels (Power / Speed Map) are set within the display and will scale accordingly. Example Assist 1-3, Assist 1 = 33% Power / Speed. Assist 2 = 66% Power / Speed. Assist 3 = 100% Power and Speed.
- Dimensions 81mm x 55mm x 39mm
- Weight 300 grams
The kit includes:
ASI BAC 855 48V – 90V FOC 90A
Wiring loom to connect direct to existing BBSHD loom with Anderson Power connectors
Motor side cover
Free UK shipping
When ordering please supply your wheel size – thank you
Please note our controllers are locked and will stay locked to protect the hours and hours we spent programming and devoloping them. Sorry no exceptions
Gearing (video tutorial to follow or call for explanation):
Use a 42T front Chain wheel to “Clam Shell the motor and bring the chain line inbound – we sell a cheap Lekkie clone version)
Reduce your rear cassette size to improve the chain line, removing any gears smaller than 15T and create your perfect centre-line around the 26T/28T rear sprocket (depending on wheel size)
Remove the old 9 -10=11 speed cassette and use the gear range from 15T to lowest gear. We love the Shimano XT CS-M771-10 speed cassette as shown in the photo. Use spacers to give you a perfect chain line for the gear of your choice. For 27.5 and 29er set ups we recommend a 28T rear gear. For 26″ wheels a 26″ T gear. For fat bikes as big as you can get! (32T +)
If you want to be very smart, you can use a 2.35 mm spacer from your old cassette to space out a 17T as a “Get you home” cog for pedaling or PAS assist in power level 1. But you might have to manually put the chain onto the cog. Use your old derailleur as a tensioner and give your self enough chain (we recommend KMC x10e chains) to move up and down you have. You will want to adjust your max/min screws so the chain does not slip off the outer sprockets (You may need to change these for longer screws)
Photos of rear gears and spacers are not included
Graham C I don’t think the BBSHD is weak as people say. Abuse it yes and something will fail just like any mechanical product. My motor was purchased from Francis Janssen in November 2017. Since then I have completed 7000 miles with approx half of those miles with a Luna Ludicrous controller fitted. My 20 miles daily commute, downhilling, bmx tracks, trails the lot ! I’ve not touched anything internally on the BBSHD and it’s running better than ever, all these stories of nylon gears failing I’m sure is down to the rider, have some mechanical sympathy and you’ll be fine. As Francis states I have now fitted the ASI 888 running on 72v, I followed his advice, got my chain line in order, correct gearing and 500 miles later she is absolutely flying, a weapon indeed. It’s far exceeded my expectations, high revving, smooth ramp up of power, throttle response, acceleration is crazy compared to the Ludicrous, top speed, all fantastic and so much fun, it does not feel like the motor is working hard. I am extremely pleased. I can thoroughly recommend this conversion and Electron Cycles ( Francis Janssen) for there professional services. Go for it !
BBSHD Motor (standard):
BBSHD Mid Drive kit is light but strong and unprecedented levels of engineering (Rated 1000W – 1500W dependent on setting and have a proven to work reliably at 4000Watts) and Max Torque 160 NM) More efficient than HUB motors giving greater distance and response. This mid drive provides powerful ebike performance meanwhile keeps the original pedaling in comfort. With an integrated speed sensor, this mid-drive motor is compatible with standard bikes. Throttle only use in PAS mode “0” is available allowing to rest without pedaling and a further 9 levels available with “on the fly” switching.
These motors are regarded as the very best in the EBike world. Extremely quiet and robust. Fully waterproof and internally lubricated within sealed casings. There have been recorded distances of 25000 miles and still going!
This motor is designed to fit bikes with a Bottom Bracket between 68 mm to 73 mm
The motor is designed to work with batteries rated at 48
Motor weight: 5.8kg.
An independent review:
The kit comprises of:
BBSHD mid drive system : BB:68-73MM
1.BBSHD + Mid-Drive Motor: 1 pc
- 750c Display
- Thumb Throttle: 1 pc
- Waterproof Quick Release Wires: 1 pc
- Speed Detecting Sensor + Magnet: 1 pc
- 46T Chain wheel: 1 pc
- Left Crank + Right Crank: each 1 pc
- Fixing Plate: 1 pc
- M5*10 Nuts: 5 pcs
- M6*12 Nuts: 2 pcs
- M33 Nuts: 2 pcs
- ST 3.9 Nuts: 5 pcs
- Gear Sensor
- 6v light cable
Pleas note, to reduce the price we remove the standard Bafang controller at the cost price.
Weight of BBSHD motor: 5kg.
The ASI BAC 855 is locked by us and cannot be re-programmed by third parties. The Bluetooth function is also locked. We do this to protect our intellectual property and the try to recoup some of the hours and hours or programming and testing that went into this device.
Warranty: The ASI is compete covered by our 12 month warranty. It does not cover accidental damage or damage from shorts or water.
The BBSHD is fortunately not covered. This device is being sold to you to be used in a tuned non factory set up. If used correctly with the correct gearing, it is a reliable for thousands of miles, But like any customized or “tuned” product, is liable for failure if used incorrectly.
Attempting to reprogram the controller may cause damage and invalidate any warranty to the controller
We give a limited 6 month warranty of this package.
**** Due to the nature of this device (Off-Road) and exposure to water, rain, mud and the possibility to sustained high powered use/abuse. Our warranty is limited to 6 months from time of purchase.
Please state what voltage y would like this set to at check out (52v or 72v)
Plesae note we have no affiliation with ERT