All Collections
Ebike Terms and Definitions
Ebike Terms and Definitions
Here is a glossary of helpful ebike terms and definitions.
Team avatar
Written by Team
Updated over a week ago

Here is a glossary of helpful ebike terms and definitions, so you can be hip to the lingo 👍:




Ah is an abbreviation for "Amp-hour". Amp-Hour is a unit of measurement for the capacity for a battery.


Amp is a unit of electrical current.


Amp-hour is a unit of measurement for the capacity for a battery.

Anderson Connection

The connection plugs we use to connect our batteries and motors,

Battery Mount

The mounting device that installs on your frame and holds the battery with electrical leads to connect the battery to the ebike motor.

Photo of one of our battery mounts (Shark Battery Mount):

Bottom Bracket Shell

A bike's bottom bracket shell is the frame tube where the cranks are installed.

BMS (Battery Management System)

The BMS (Battery Management System) is the brains of the battery. It is the electronic system that manages a rechargeable battery by monitoring its state, reporting data, protecting the battery, and controlling and balancing the battery.


The speed at which you pedal.

Cadence Sensor

The type of Pedal Assist Sensor in our motors. The Cadence Sensor registers when you move the pedals and stops registering when you stop pedaling. Using the cadence sensor, you have to control the power level and speed by adjusting the Pedal Assist Level mode manually up and down.


The cog/sprocket that caries the bike's chain and attached to the bike's crank.


The pair of tubes on a bike frame that runs from the bottom bracket to the rear fork ends.


A device for charging a battery.

Photo of one of our chargers (Standard 2amp Charger):

Charger Port

A receptacle port on the battery to connect and plug the charger into the battery.


The brain of the motor that allows the electronics to communicate and controls the motor.

Crank Arm

The levers that attach your pedals to your bottom bracket.


A mechanism for shifting gears on a bicycle that operates by moving the chain from one set of exposed gears to another.

Disc Brake

Disc brakes are a type of braking system that work by using calipers to squeeze brake pads against the sides of a the brake rotating disc thus slowing the bike.


The LCD Display that turns on the motor kit and shows your ride details (Odometer/Trip, Speed, PAS Level, Error Codes).

Display Control Pad

The control pad hardwired into the display with the buttons ("on", "+", and "-") that allows you to interact with the display.


The downtube is the part of the bike frame that connects the head tube to the bottom bracket shell.

Drive side

The side of the bike that includes the chain and derailleur.


The dropouts are the slots in the bicycle where the rear and front axles sit and allow the wheels to be removed without removing or derailing the chain. The dropout is the part of the frame that is designed to hold the wheel and axle.

Ebrake Mechanical Lever

Ebrake Sensor

The Ebrake Sensors allow you to convert your existing brake levers that you already have on your bike into Ebrakes that are able to cut off power to the motor when engaged.

Please visit our Bafang Ebrake Sensor Installation Page to watch the installation video for more information.

Please visit the Bafang Ebrake Sensor Product Page for a full description and photos of the product.


A bicycle fork is the part of a bicycle that holds the front wheel.

Gear Sensor

The Gear Sensors is a device that momentarily cuts motor power when shifting. It mounts inline with the shifter cable and detects the cable movement. It sends a signal to the controller to cut motor power while shifting gears.

Please visit our Gear Sensor Installation Page to watch the installation video for more information.

Please visit the Bafang Gear Sensor Product Page for a full description and photos of the product.


Light that integrates with the Display that is installed at the front of your bike. The light improves visibility of the bike and the surroundings for both the rider and others.

Hub Motor

The hub motor (also called wheel motor, wheel hub drive, or in-wheel motor) is an electric motor that is incorporated into the hub of a wheel and powers the wheel directly.

Lithium-Ion Battery

A lithium-ion battery or Li-ion battery is a type of rechargeable battery. Lithium-ion batteries are commonly used for electric vehicles and portable electronics.

Main Wiring Harness

The wiring harness that connects the motor with a cable to the kit components on the handlebar (display, Ebakes, throttle).

Mid-Drive Motor

A Mid-drive motor is installed between a bike's cranks. It is an electric motor that generates torque and spins a shaft that’s connected to the chainring to power the rear wheel via the bicycle's chain drive.


PAS is an abbreviation for Pedal Assist. See below.

Pedal Assist

Pedal assist is a type of ebike motor power that engages when the rider is pedaling and the system is turned on and in PAS Level 1 or higher. You can find more information about Pedal Assist Power here.

Pedal Assist Sensor

The electronic sensor that detects a rider's pedaling.


The rim is the circular strip of metal forming the connection between the wheel and tire.

Rim Brake

Rim brakes are a type of braking system that work by applying friction pads to the rim of the rotating wheel, thus slowing the bike. Rim brakes are typically actuated by a lever mounted on the handlebar.


RPM stands for revolutions per minute. Pedal speed or cadence in cycling is measured in pedal stroke revolutions per minute (RPM). For example, a cadence of 60 RPM means that one pedal makes a complete revolution 60 times in one minute.


Bicycle wheel spokes are the connecting rods between the bicycle hub and the rim.


Throttle is a type of ebike motor power that engages when the rider uses the throttle. There is no need to pedal while you are using the throttle power. You can find more information about Throttle Power here.


A rubber cushion that fits around a wheel and usually contains compressed air.


Torque is a measure of the force that causes an object to rotate about an axis.


Voltage is the unit of current in a battery and is measured in volts. Higher voltage means more current flows through the battery.

Walk Assist Mode

The walk assist mode feature allows the motor to help engage and move your ebike. This feature is designed to be used when you are walking your ebike (with your hands on the handlebars and walking next to the bike). You can find more information about the Walk Assist Mode here.


A Watt is a unit of electrical power equal to one amp under the pressure of one volt.


A measurement of electrical energy equal to the energy of one watt operating for one hour used to describe battery capacity.

Watt Meter

A device for measuring electric power.


A component consisting of a circular frame with spokes (or a solid disc) that can rotate on a shaft or axle. A bike wheel includes the rim, tire, spokes and hub.

Did this answer your question?