Ebike Glossary: 40 Electric Bike Terms Explained

This guide is based on public information and manufacturer specifications. We do not claim hands-on testing. Prices and availability change often, and tariffs can move them; check the listing for current details.

Ebike pages are full of jargon. This glossary explains the terms you will meet in reviews and buying guides, in plain English.

Motors and control

Pedal assist (PAS)

A motor mode that helps while you pedal, usually with several assist levels.

Throttle

A twist or thumb control that powers the bike without pedalling.

Pedelec

An ebike where the motor only helps while you pedal.

Class 1, 2, 3

US ebike categories based on throttle and assisted speed. See ebike classes.

Hub motor

A motor built into the front or rear wheel.

Mid-drive motor

A motor at the pedal cranks that drives the chain. See hub vs mid-drive.

Torque sensor

A sensor that measures how hard you pedal and adjusts assist smoothly.

Cadence sensor

A sensor that detects pedalling but not effort; assist feels more on-off.

Controller

The electronics that manage motor power.

Torque (Nm)

Twisting force from the motor. Higher numbers help with hills and loads.

Watts (W)

Motor power rating. Compare with torque and system design, not alone.

Battery

Volts (V)

The electrical pressure of the battery, often 36 V or 48 V.

Amp-hours (Ah)

The battery’s charge capacity.

Watt-hours (Wh)

Volts times amp-hours; the best number for comparing battery energy. See range explained.

Range

How far the bike can go on a charge under given conditions.

Charge cycle

One full discharge and recharge of the battery.

BMS

The battery management system that protects the cells.

UL certification

Safety testing standards for ebike electrical systems. See battery safety.

Removable battery

A battery you can take off the bike to charge or store.

Frame and fit

Step-through frame

A frame with a low top tube that is easy to mount.

Folding ebike

An ebike that folds for storage or transport.

Cargo ebike

An ebike built to carry loads or children.

Fat tire

Wide tyres for sand, snow and rough terrain.

Suspension fork

A front fork that absorbs bumps.

Standover height

Height of the top tube; relevant to fit.

Payload capacity

Maximum total weight of rider and cargo.

Components

Hydraulic disc brakes

Brakes using fluid for strong, consistent stopping.

Mechanical disc brakes

Cable-operated disc brakes; simpler but weaker feel.

Derailleur

The gear mechanism that moves the chain between sprockets.

Internal hub gear

Gears sealed inside the rear hub.

Display

The screen showing speed, assist level and battery.

Fenders and rack

Practical accessories for commuting and carrying items.

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