eBike Dictionary: 40+ Electric Bike Terms Every Rider Should Know

Buying an eBike can feel surprisingly complicated.

You start comparing models and suddenly encounter terms like torque sensor, cadence sensor, nominal wattage, peak power, amp-hours, watt-hours, PAS, Class 1, hydraulic brakes, mid-drive, hub motor, IP rating, and more.

What do they actually mean? And which specifications matter when you're choosing an electric bike for commuting, recreation, hills, or everyday riding in Canada?

This guide breaks down the most common eBike terminology in plain English, so you can understand product specifications and make more informed comparisons.

Quick note for Canadian riders: eBike regulations can vary by province and municipality. The terms in this guide describe common industry terminology, while legal requirements should always be checked against the rules where you ride. For example, Ontario and Quebec generally define road-legal power-assisted bicycles around a 500W maximum motor rating and 32 km/h maximum assisted speed, while British Columbia's current regulations distinguish between light and standard e-bikes.

eBike Basics: The Terms You’ll See First

Let's start with the terminology you'll encounter on almost every electric bike product page.

1. eBike / Electric Bike

An eBike, short for electric bike or electric bicycle, is a bicycle equipped with an electric motor and rechargeable battery that provides additional power while riding.

Depending on the design and local regulations, an eBike may use:

• Pedal assistance
• A throttle
• Or both

The important distinction is that an eBike is still designed around a bicycle-style riding system, typically with pedals, handlebars, two or three wheels, and an electric drive system.

Canadian legal definitions can be more specific than the general industry meaning. For example, Ontario requires an eBike to have operable pedals and defines requirements including a motor of no more than 500W and an assisted speed of no more than 32 km/h.

2. Pedal Assist / PAS

PAS stands for Pedal Assist System.

When pedal assist is active, the motor provides assistance when you pedal. Instead of the motor doing all the work, it supplements your effort.

Many eBikes have several PAS levels, such as:

• PAS 0 — no motor assistance
• PAS 1 — low assistance
• PAS 2–3 — moderate assistance
• PAS 4–5 — higher assistance

Higher PAS levels generally provide more motor assistance but can also consume more battery energy.

Best for: Riders who want the feeling of cycling while reducing the effort required to accelerate, climb hills, or cover longer distances.

3. Throttle

A throttle allows you to activate the motor without continuously pedaling.

Depending on the eBike, it may be operated with:

• A thumb throttle
• A twist throttle
• Another hand-operated control

Throttle operation can be convenient when starting from a stop, climbing a hill, or taking a short break from pedaling.

However, whether throttles are permitted and under what conditions depends on local regulations.

4. Pedal-Assist Sensor

A pedal-assist sensor detects when you're pedaling and tells the motor when to provide assistance.

The two most common types are:

• Cadence sensor
• Torque sensor

Understanding the difference between these two is particularly useful when comparing eBikes.

Motor Terms

The motor is one of the most important components of an eBike, but motor specifications can be confusing.

5. Hub Motor

A hub motor is built into one of the bicycle's wheel hubs.

There are two common configurations:

• Front hub motor
• Rear hub motor

Rear hub motors are particularly common on commuter and recreational eBikes.

Advantages of hub motors:

• Relatively simple design
• Generally reliable
• Often less expensive
• Easy to manufacture and maintain

A hub motor can be a practical choice for commuting, paved paths, casual riding, and everyday transportation.

6. Mid-Drive Motor

A mid-drive motor is mounted around the bicycle's crank and bottom bracket area rather than inside the wheel.

Because the motor drives the crank, it can take advantage of the bike's gears.

This can make mid-drive systems particularly useful for:

• Steep hills
• Mountain riding
• Technical terrain
• Riders who want a more natural cycling experience

Mid-drive systems are often more expensive than hub-motor systems.

7. Nominal Power

Nominal power refers to the motor's rated continuous output under specified conditions.

You may see specifications such as:

500W nominal motor

This doesn't necessarily mean the motor can never produce more than 500W.

8. Peak Power

Peak power is the higher output the motor can produce for a limited period, typically when additional power is needed.

For example, an eBike might be advertised with:

500W nominal / 750W peak

The 500W figure describes the motor's rated continuous output, while 750W represents its potential peak output.

Why does this matter?

Peak power can be useful when:

• Starting from a stop
• Climbing hills
• Carrying additional weight
• Accelerating

But more watts doesn't automatically mean a better eBike. Motor efficiency, torque, controller settings, gearing, battery voltage, rider weight, terrain, and other factors all affect real-world performance.

9. Torque

Torque describes the motor's rotational force and is commonly measured in Newton-metres (Nm).

For example:

60 Nm of torque

Higher torque can help an eBike produce stronger acceleration and climb hills more effectively, especially at lower speeds.

Torque is particularly important if you regularly ride:

• Steep roads
• Hilly neighbourhoods
• Gravel
• Off-road trails
• With heavy cargo

10. Motor Controller

The motor controller acts as the electronic intermediary between the battery, motor, sensors, throttle, and display.

It controls how electrical power is delivered to the motor.

In simple terms:

Battery → Controller → Motor

The controller can influence characteristics such as acceleration, power delivery, and responsiveness.

Sensor Terms

11. Cadence Sensor

A cadence sensor detects whether and how quickly you're pedaling.

Once it detects pedal movement, the motor provides assistance according to the selected PAS level.

Cadence-sensor systems are generally straightforward and can be cost-effective.

Typical riding feel: Pedal → sensor detects movement → motor assistance begins.

12. Torque Sensor

A torque sensor measures how much force you're applying to the pedals.

If you pedal harder, the system can respond with more assistance.

Typical riding feel:

• Pedal lightly → less assistance
• Pedal harder → more assistance

This can create a more natural cycling experience and can be particularly useful for riders who want precise control over motor assistance.

13. Cadence Sensor vs. Torque Sensor

Feature	Cadence Sensor	Torque Sensor
Detects	Pedal movement	Pedaling force
Riding feel	More on/off	More responsive
Assistance	Based largely on PAS setting	Changes with rider effort
Cost	Generally lower	Generally higher
Best suited to	Casual riding and commuting	Natural-feeling cycling and performance riding

Neither system is automatically right for everyone.

If you want simple motor assistance without worrying too much about how hard you're pedaling, a cadence sensor may work well.

If you want the motor to respond more closely to your own effort, a torque sensor may be preferable.

Battery Terms

Battery specifications are among the most misunderstood parts of an eBike.

14. Battery Capacity

Battery capacity tells you how much electrical energy the battery can store.

It is commonly expressed in:

• Wh (watt-hours)
• Or sometimes Ah (amp-hours)

For comparing eBike batteries, Wh is usually the more useful number.

15. Watt-Hours (Wh)

Watt-hours measure the battery's energy capacity.

A simple calculation is:

Wh = Volts × Amp-hours

For example:

48V × 15Ah = 720Wh

A 720Wh battery stores more energy than a 500Wh battery, assuming the ratings are comparable.

However, battery capacity doesn't translate directly into a specific riding range.

16. Amp-Hours (Ah)

Amp-hours describe electrical charge capacity.

You might see:

48V 15Ah battery

The 15Ah figure alone doesn't tell you the total energy capacity.

You need voltage as well:

48V × 15Ah = 720Wh

That's why comparing Wh can be easier when evaluating two batteries with different voltage and Ah ratings.

17. Voltage (V)

Voltage describes the electrical potential of the battery system.

Common eBike battery systems include:

• 36V
• 48V
• 52V

Voltage is only one part of the equation, however.

For example:

• 48V 10Ah = 480Wh
• 48V 15Ah = 720Wh

The second battery stores substantially more energy despite having the same voltage.

18. Battery Range

Range refers to how far an eBike can travel on a battery charge.

Manufacturers often provide an estimated maximum range, but actual range can vary significantly.

Factors include:

• Rider weight
• PAS level
• Throttle use
• Speed
• Terrain
• Wind
• Temperature
• Tire pressure
• Cargo
• Battery condition
• Riding surface

Therefore, a published range should be treated as an estimate rather than a guarantee.

19. Range Anxiety

Range anxiety is the concern that your battery will run out before reaching your destination.

The easiest way to reduce it is to plan around your typical real-world riding distance, rather than buying an eBike solely because it advertises the largest maximum range.

For Canadian riders, weather deserves particular attention. Cold temperatures can affect battery performance and may reduce the range you experience compared with ideal test conditions.

20. Removable Battery

A removable battery can be detached from the eBike for charging.

This is especially convenient if you:

• Live in an apartment
• Store your eBike in a garage
• Don't have an electrical outlet near your parking location
• Want to charge the battery indoors

21. Integrated Battery

An integrated battery is built into the frame, often inside the downtube.

It can provide a cleaner appearance and can help centralize the battery's weight.

Some integrated batteries are removable, while others are not, so integrated does not automatically mean non-removable.

22. Battery Management System (BMS)

The Battery Management System, or BMS, monitors and helps manage the battery pack.

Depending on the battery design, it can help protect against conditions such as:

• Overcharging
• Over-discharging
• Excessive current
• Abnormal operating conditions

The BMS is an important part of battery safety and longevity.

Speed and Performance Terms

23. Top Speed

Top speed is the maximum speed an eBike can reach under specified conditions.

Don't confuse this with maximum assisted speed.

An eBike may be physically capable of traveling faster downhill or under rider power, while its motor assistance cuts off at a particular speed.

24. Maximum Assisted Speed

This refers to the speed at which the motor stops providing assistance.

This distinction is particularly important in Canada because provincial regulations can specify maximum assisted speeds.

For example, Ontario requires qualifying eBikes to stop providing propulsion assistance at 32 km/h or above. Quebec similarly requires the motor to cease generating power at no more than 32 km/h for eBikes operated on public roadways.

British Columbia's current Motor Assisted Cycle Regulation also uses a 32 km/h limit for standard e-bikes, while its newer light e-bike category uses a 25 km/h limit and requires pedal or hand-crank engagement rather than an accelerator controller.

25. Hill-Climbing Ability

Hill-climbing ability describes how effectively an eBike can handle inclines.

It's influenced by much more than motor wattage.

Important factors include:

• Motor torque
• Motor type
• Controller output
• Battery voltage
• Rider weight
• Gear selection
• Tire traction
• Hill gradient

A bike with a high advertised wattage isn't necessarily the best climber in every situation.

26. Grade / Incline

A hill's grade describes how steep it is.

For example:

10% grade

means the elevation rises approximately 10 metres for every 100 metres of horizontal distance.

A higher percentage means a steeper hill.

When comparing eBike hill-climbing specifications, remember that manufacturer test conditions may differ.

Drivetrain Terms

27. Drivetrain

The drivetrain is the collection of components that transfers your pedaling power to the rear wheel.

It can include:

• Crank
• Chainring
• Chain
• Cassette or freewheel
• Derailleur
• Gear shifter

On a mid-drive eBike, the motor also works through the drivetrain.

28. Gearing

Gears allow you to adjust the mechanical advantage between your pedaling effort and wheel speed.

Lower gears make it easier to climb hills.

Higher gears are useful for faster riding on relatively flat terrain.

Even on an eBike, using the appropriate gear can improve efficiency and make riding more comfortable.

29. Derailleur

A derailleur moves the chain between different gears.

A rear derailleur is one of the most recognizable components on a traditional multi-speed bicycle.

30. Freewheel vs. Cassette

Both freewheels and cassettes contain multiple rear sprockets, but they use different attachment systems.

For beginners, the practical takeaway is that they're different drivetrain designs and aren't always interchangeable.

This distinction becomes more important when replacing drivetrain components or performing maintenance.

Wheel and Tire Terms

31. Tire Size

You might see specifications such as:

• 20 × 4.0
• 26 × 2.1
• 27.5 × 2.4
• 29 × 2.2

The numbers generally describe wheel diameter and tire width.

A wider tire can provide additional stability and traction, while narrower tires may offer lower rolling resistance on paved surfaces.

32. Fat Tire eBike

A fat-tire eBike typically uses tires around 4 inches wide or more.

Fat tires can provide:

• Greater traction
• More stability
• Better flotation over loose surfaces
• Additional cushioning

They're popular for snow, sand, gravel, and mixed-terrain riding.

The tradeoff is that wider tires can also add weight and rolling resistance.

33. Tire Pressure

Tire pressure affects comfort, handling, traction, rolling resistance, and puncture protection.

Always follow the manufacturer's recommended pressure range printed on the tire or specified in the owner's manual.

Riding with significantly underinflated or overinflated tires can affect handling and component wear.

34. Puncture-Resistant Tires

Puncture-resistant tires use additional material or construction techniques to reduce the chance of punctures.

They're particularly useful for commuters who frequently ride over:

• Gravel
• Broken pavement
• Glass
• Small debris

However, no pneumatic tire is completely puncture-proof.

Brake Terms

35. Mechanical Disc Brakes

Mechanical disc brakes use a cable to activate the brake caliper.

They're generally:

• Simple
• Easy to understand
• Relatively easy to service
• Often less expensive

36. Hydraulic Disc Brakes

Hydraulic disc brakes use fluid pressure instead of a traditional mechanical cable.

They can provide:

• Strong braking
• Smooth modulation
• Consistent performance
• Reduced hand effort

Hydraulic brakes can be particularly attractive for heavier eBikes, frequent downhill riding, or riders who regularly carry cargo.

37. Brake Rotor

The rotor is the circular metal disc attached to the wheel hub.

When you apply the brakes, the brake caliper clamps the rotor to slow the wheel.

Larger rotors can provide greater braking leverage and heat management, although the appropriate size depends on the bike and braking system.

Comfort and Suspension Terms

38. Front Suspension / Suspension Fork

A suspension fork is the suspension system located at the front of the bicycle.

It can absorb impacts from:

• Potholes
• Gravel
• Roots
• Rough pavement
• Uneven trails

For primarily smooth urban riding, suspension may be less important than it is for off-road riding.

39. Full Suspension

A full-suspension eBike has suspension at both the front and rear.

It can provide greater comfort and control on rough terrain but generally adds:

• Weight
• Complexity
• Cost

For commuting on paved roads, a hardtail or rigid bike may be sufficient. For trail riding, full suspension can become much more valuable.

40. Hardtail

A hardtail eBike has front suspension but no rear suspension.

It's a common compromise between comfort, weight, efficiency, and simplicity.

Smart and Electronic Features

41. LCD Display

An LCD display provides information such as:

• Current speed
• Battery level
• PAS level
• Distance
• Trip information
• Error codes

The exact information varies by model.

42. Walk Assist

Walk assist provides low-speed motor assistance while you're walking alongside the eBike.

It can be useful when:

• Pushing the bike uphill
• Moving a heavy eBike
• Navigating a parking area
• Walking the bike over a short distance

43. Pedal Assist Levels

PAS levels determine how much motor assistance you receive while pedaling.

A low PAS level can help conserve battery, while higher levels can make hills and acceleration easier.

For longer rides, alternating between PAS levels can help balance performance and range.

44. Regenerative Braking

Regenerative braking, or regen braking, uses the motor as a generator during deceleration to send some energy back toward the battery.

It's common in electric cars but much less common on conventional eBikes.

The amount of energy recovered is generally limited, so regenerative braking should not be viewed as a way to substantially recharge an eBike during normal riding.

Weather and Protection Terms

45. IP Rating

An IP rating, or Ingress Protection rating, describes how well an enclosure protects against solids and liquids.

You may see ratings such as:

• IP54
• IP65
• IPX4
• IPX5

The first number generally refers to protection against solid particles, while the second refers to water protection.

The X means that no rating has been specified for that category.

For example:

• IPX4 — protection against water splashes from various directions
• IPX5 — protection against water jets under specified test conditions

An IP rating does not mean an eBike is waterproof in every situation.

Always follow the manufacturer's instructions regarding rain, washing, charging, and storage.

Weight and Capacity Terms

46. Payload Capacity

Payload capacity is the maximum total weight the eBike is designed to carry.

Depending on the manufacturer's specification, this may include:

• Rider
• Clothing
• Backpack
• Cargo
• Accessories
• Passenger, if permitted

Always check the manufacturer's definition rather than assuming the number refers only to rider weight.

47. Gross Vehicle Weight

Gross vehicle weight generally refers to the total weight of the vehicle and everything it is carrying.

This can include the bike itself, rider, battery, cargo, and accessories depending on the stated specification.

48. Step-Through Frame

A step-through frame has a lower or open central frame section that makes it easier to mount and dismount.

It's popular among:

• Commuters
• Older riders
• Riders wearing work clothes
• Riders carrying cargo
• Anyone who prefers easier mounting

49. Step-Over Frame

A step-over frame has a traditional top tube between the seat and handlebars.

It can offer a familiar bicycle design and, depending on the model, may provide additional frame rigidity.

The 10 eBike Specifications That Matter Most

If you're overwhelmed by all the terminology, you don't need to understand every specification before buying an eBike.

Start with these:

Specification	What it tells you	Why it matters
Motor type	Hub or mid-drive	Affects riding feel and climbing
Motor power	Rated/nominal output	Indicates motor output within its rating
Torque	Rotational force	Important for acceleration and hills
Battery Wh	Stored energy	Useful for comparing battery capacity
Voltage	Electrical system voltage	Works together with Ah to determine Wh
Estimated range	Expected distance	Helps with trip planning
PAS sensor	Cadence or torque	Affects riding feel
Brake type	Mechanical or hydraulic	Affects braking performance and maintenance
Tire size	Diameter and width	Influences comfort and traction
Payload	Maximum carrying capacity	Important for rider + cargo weight

How to Read an eBike Specification Sheet

Suppose you see an eBike specification like this:

• 500W motor
• 48V 15Ah battery
• Up to 100 km range
• Torque sensor
• Hydraulic disc brakes
• 26 × 4.0-inch tires

Here's what it tells you:

500W motor

The motor has a 500W rated output under the manufacturer's stated specifications.

You should still check whether the stated power rating meets the requirements where you intend to ride.

48V 15Ah battery

Calculate:

48 × 15 = 720Wh

So the battery has a nominal energy capacity of approximately 720Wh.

Up to 100 km range

This is a maximum estimated range, not a guarantee that every rider will achieve 100 km.

Actual range depends on riding conditions.

Torque sensor

The motor responds to your pedaling force rather than simply detecting whether you're pedaling.

Hydraulic disc brakes

The bike uses hydraulic braking rather than cable-actuated mechanical disc brakes.

26 × 4.0-inch tires

The bike uses relatively wide tires designed to provide additional stability and traction.

Suddenly, the specification sheet becomes much easier to understand.

Final Thoughts: Learn the Terms Before You Compare the Bikes

Understanding eBike terminology makes shopping much easier.

Instead of seeing:

500W + 48V 15Ah + 60Nm + torque sensor + hydraulic brakes

as a collection of technical numbers, you can start asking more useful questions:

• Is the motor appropriate for the terrain I ride?
• Is the battery large enough for my typical trips?
• Do I prefer cadence-based or torque-based assistance?
• Do I need hydraulic brakes?
• Would fat tires actually benefit my riding?
• How much weight does the bike need to carry?
• Does the eBike meet the rules where I plan to ride?

And perhaps most importantly, don't choose an eBike based on a single specification.

A larger battery isn't automatically better if you rarely ride long distances. More motor power isn't automatically better if your rides are mostly flat. Full suspension may be unnecessary for a city commuter, while a commuter-style rigid bike may not be ideal for rough trails.

The best way to compare eBikes is to look at the complete system—motor, battery, sensors, brakes, tires, frame, weight, range, and intended use—together.

For Canadian riders, also make sure the specific eBike you're considering complies with the regulations applicable to your province and the places where you intend to ride. Rules can differ between jurisdictions, and municipal restrictions may also apply.