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BionX · All-in-one wheel · Canada

BionX D-series

Maker list

Battery in the offer. Charger included. 25 km/h.

Canadian all-in-one rear hub. The system that defined the category. Production ended.

BionX D-series
Continuous
250 W
Class
25 km/h
Energy
No pack
Axle
135 mm quick release
Green road bicycle on gravel, fitted with a rear hub motor and a downtube battery.
On a bike

01

Motor wheel

The motor is the hub

Continuous
250 W
Peak
Set with the build
Motor
On the card
Wheels
700c, 26, 27.5

BionX D-series is a complete rear wheel. The motor, spokes, rim and axle leave the workshop as one part, built for 700c, 26, 27.5. Continuous rated power is 250 W. Claimed peak is Set with the build, kept separate from the continuous rating used on Great Britain roads.

Read the build notes

Mass of the motor is published on the wheel card. The system, once the named parts are on the bike, is the wheel plus the pack and charger. Rear motor wheel, External pack on D-series, Console.

02

Axle

135 mm quick release

Axle
135 mm QR
Brakes
Disc rotor
Install
Workshop
Sensor
Torque

The axle is the fit. BionX D-series uses 135 mm quick release. Dropouts, the skewer or thru-axle, and the space between the stays have to match that figure before the wheel is offered as a swap.

Read the build notes

A different axle width is a different configuration. Adapters are not assumed, and they are not in the Maker list offer unless the included list names them.

03

Torque arm

The dropout is not asked to hold the torque alone

Role
Axle reaction
Fits
135 mm QR
With
Disc caliper clearance
Spare
BionX arm

A hub motor tries to rotate the axle in the dropout every time it drives. BionX fits a torque arm so that load goes into the frame, not into a skewer nut.

Read the build notes

The arm is a named part for BionX D-series. A generic plate from another kit is not the spare. It has to clear the derailleur, the disc caliper and the stay.

04

Drivetrain

Your gears stay yours

Torque
Set with the build
Sensor
Torque
Gears
Existing cassette
Chain
Kept

The hub takes a cassette that matches the speeds already on the bike. BionX D-series does not include a groupset. The existing chain, derailleur and shifter stay, provided the cassette body matches.

Read the build notes

Gear range still matters on hills. The motor adds Set with the build at the hub (Manufacturer stated.) and the cassette is what turns that into a climb.

05

Battery

BionX pack

Model
BionX pack
Energy
Matched when the pack is named
Capacity
Set with the build
Voltage
48 V

BionX pack is in the BionX D-series offer. Matched when the pack is named at 48 V, Set with the build. Chemistry: Lithium-ion.

Read the build notes

The pack is part of the configuration, not an accessory you choose by voltage. It mounts as named in the manual and it is the only pack this page prices into the Maker list figure.

06

Charger

Included charger

Model
Included charger
In the offer
Yes
Pack
BionX pack
Warranty
Maker warranty. Term is on the invoice.

Included charger is the charger for BionX pack. It is in the box with BionX D-series. A charger from another voltage or another brand is not a substitute.

Read the build notes

Charge rate, connector and the pack it is allowed to feed are fixed by that model name. The warranty follows the pair: Maker warranty. Term is on the invoice..

07

Controller

Included controller

Controller
Included controller
Cut-off
15.5 mph
Throttle
Not fitted
Pedals
Kept

Control for BionX D-series is Included controller. It is paired to this generation of motor, display and sensor. A later housing is a different part.

Read the build notes

Assistance cut-off on this configuration is 15.5 mph. Pedals stay on the bike. The motor assists while you pedal.

08

Sensor

Torque sensing

Type
Torque
Lead
To the controller
Mount
Chainstay or bottom bracket
Included
See the box list

BionX D-series reads the pedals with a torque sensor. The magnet, the pickup and the lead are part of the install, routed so they survive the first muddy commute.

Read the build notes

Sensor type changes how the motor comes in. Cadence counts rotation. Torque measures how hard you push. Combined does both. This configuration is torque.

09

Harness

One loom, labelled ends

Run
Stay, down tube, bar
Connectors
Keyed
Display
Paired to this controller
Service
Workshop

Power, sensor and display share a loom cut for BionX D-series. Connectors are keyed. The main run follows the chainstay, then the down tube, and finishes at the bar without a coil of spare cable at the stem.

Read the build notes

Junctions stay out of the spray from the rear wheel. The torque arm, the axle nuts and the connector boots are checked together at the end of the install, not as three separate jobs.

Install

Order of work

Workshop install, in this order.

  1. 01Confirm 135 mm quick release and a disc mount that matches the wheel.
  2. 02Lace is already done. Fit the BionX D-series wheel, skewer and torque arm.
  3. 03Move the cassette and the rotor. Set the derailleur limit screws.
  4. 04Mount BionX pack on the frame position in the manual.
  5. 05Connect Included charger to that pack only.
  6. 06Fit the sensor and the display. Tie the loom. Check the cut-off on a first ride.

In depth

Read BionX D-series before you book it.

All-in-one wheel · 25 km/h · Canada. The numbers below are the ones on this configuration, not the family in general.

The offer

What BionX D-series actually is

BionX D-series is one configuration from BionX, made in Canada, filed here as a all-in-one wheel. The family is D, generation Catalogue. Canadian all-in-one rear hub. The system that defined the category. Production ended.

In the box, as this record has it: Rear motor wheel, External pack on D-series, Console. Still required before the bike moves under its own assist: Parts supply is the constraint. A cheaper advert for the same family name is not this list. If the battery, the charger or the throttle differs, it is a different configuration and it gets a different page.

Historical. 250 W street systems were sold into Europe and North America.

The price on the card is the maker’s published figure in CAD, or Maker list when no figure was published. Allowances for a missing pack, a charger and workshop time sit in the complete-cost band. They are not a second product and they are not a promise that a random pack will talk to this controller.

The bicycle

The frame this motor is asking for

BionX lists BionX D-series against Hybrid, Road bicycles, for Commuting, Touring. Wheel sizes on the card: 700c, 26, 27.5. The mechanical interface is 135 mm quick release. Brakes are disc.

A rear hub has to share the dropouts with the gears and the brake. 135 mm quick release is not 142 mm thru-axle, and an adapter is a different configuration. The derailleur hanger, the rotor and the torque arm all want the same few centimetres. Internal-gear hubs are a separate build, not a checkbox on a cassette wheel.

Pedals stay. This configuration is a bicycle with assistance, not a motorcycle conversion. Sensor on the card: torque. Cut-off on the card: 15.5 mph. Throttle: not fitted.

The numbers

250 W is not the whole story

Continuous rated power for BionX D-series is 250 W. Claimed peak is not stated separately from the continuous rating. Torque is not published as a crank or hub figure. Manufacturer stated. Motor mass is not published. System mass, once the named parts are on the bike, is Rear motor wheel, External pack on D-series, Console.

Peak is a short claim. Street rules, including the Great Britain check on this site, use continuous rated power and the speed at which assistance stops. A controller that can be unlocked does not change the record of the motor as sold. BionX D-series is filed in the 25 km/h class: 250 W pedelec class used across the EU, Great Britain and Australia.

In this class the useful comparison is torque and mass, not a bigger watt sticker. A 250 W torque-sensing mid-drive and a 250 W cadence hub do not feel alike, and neither of them becomes legal somewhere else just because the sticker matches.

Pack and charger

The pack is part of the kit

BionX pack is no watt-hour figure in this offer at 48 V. Lithium-ion The charger is Included charger.

Nominal watt-hours are voltage times amp-hours when both are known. That is stored energy on the label, not usable energy, and not a mileage promise. Cold, load, hills and how full you dare to run the pack all move the distance. Any range sketch on this page shows the watt-hours per kilometre it assumed.

Charge this pack with the charger named for it. The same plug on a higher-voltage brick is the wrong part. A swollen, hot, hissing or sharp-smelling pack is a stop: do not open it and do not keep charging it.

All-in-one wheel

How BionX uses this layout

All-in-one wheel. Motor, battery and the electronics live in the wheel. BionX D-series does not ask for a downtube bottle cage or a rack pack. The whole system is the hub, which is why the watt-hours are modest: no watt-hour figure in this offer.

Range follows that small store. It is a town wheel, not a touring battery you swap at lunch. Weight sits in the wheel, so the bike can feel calm in a straight line and heavier to flick.

Service is the wheel, not a separate pack you post back. When the generation is discontinued, the record stays so a fitted wheel can still be identified. A new pack from another brand is not a refill.

The workshop

A workshop path, written as a sequence

BionX D-series is a workshop install in this record. Doing it yourself does not rewrite the path into a pass. It means the documented route was not the one you took, and the result stays conditional until someone competent has seen the bike.

Warranty as published: Maker warranty. Term is on the invoice.. Labour in the cost band is separate from the offer. A brake service the bike already needed, a new chain, or a hanger alignment is not folded into BionX’s price to make the total look neat.

The sensible order is measure, then mount, then connect, then the first assisted roll in the stand. Connectors are keyed for a reason. The torque arm, the axle nuts and the connector boots are one inspection at the end, not three trips.

After it is on

The first month, and the parts that wear

Spoke tension on a motor wheel is part of the service, especially in the first few hundred kilometres while the wheel beds in. A ticking torque arm is a loose bolt, not a personality. Check axle nuts after the first week.

Keep Included charger with BionX pack. Store the pack cool, part-charged if it will sit, and not in a hallway that is your only exit. BionX’s display, if one is included, is paired to this controller generation. A screen from the next family is not a spare.

My Garage on this device can hold the configuration, who fitted it, and what was still open. That note is for you and for the next workshop. It is not a certificate. If a later notice lands on this configuration, the record is where it should show.

Read next to it

From the library

Documentation completeness 58% · Discontinued · Rear hub

Manufacturer stated
Check fitInstallation help
Historical. 250 W street systems were sold into Europe and North America.
Street class is the product class. Local rules decide whether that class can be ridden.

Specification

Published figures for this configuration.

Drive
Rear hubDocument reviewed
Sensor
torqueManufacturer stated
Continuous rated power
250 WManufacturer stated
Claimed peak power
UnknownNot verified

Not used as the continuous rating.

Nominal voltage
48 VManufacturer stated
Torque
UnknownNot verified

Manufacturer stated.

Motor weight
UnknownNot verified

Rear motor wheel, External pack on D-series, Console

System weight
UnknownNot verified

Rear motor wheel, External pack on D-series, Console

Controller
Included controllerDocument reviewed
Wheel sizes
700c, 26, 27.5Document reviewed
Axle
135 mm quick releaseDocument reviewed
Brakes
DiscDocument reviewed
Bottom bracket
Not applicableDocument reviewed
Assistance cut-off
15.5 mphDocument reviewed
Throttle in this configuration
NoDocument reviewed
Warranty
Maker warranty. Term is on the invoice.Manufacturer stated

Complete cost

Uncertain lines stay labelled. Shipping and import charges are not estimated.

Kit offerMaker list
BatteryIncluded
ChargerIncluded
Required accessoriesMaker list
InstallationMaker list–Maker list
ShippingNot estimated

Estimated complete Maker list–Maker list

Nominal energy

Unknown. Not inferred from voltage alone.

Range sketch

Add a named pack before a distance is drawn.

Included

  • Rear motor wheel
  • External pack on D-series
  • Console

Required as well

  • Parts supply is the constraint

Battery and charger

Battery model
BionX packDocument reviewed
Charger model
Included chargerDocument reviewed
Chemistry
Lithium-ionManufacturer stated
Capacity
UnknownNot verified

Historical. 250 W street systems were sold into Europe and North America.

Seller offers

Published offers in Great Britain.

  • BionX

    Maker list

    Canada · Rear motor wheel. External pack on D-series. Console

    List price not published in the source used. Ask the maker.

Source documents

  • Published specificationManufacturer stated

    BionX produced all-in-one rear hub conversions until the company stopped.

Change history

  • 17 Oct 2026

    Entered from a published maker or press specification.