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How Fast Does an Electric Bike Go?

Electric bikes, or e-bikes as they’re popularly known, have surged in popularity over recent years. These modern marvels seamlessly merge the essence of traditional cycling with the power of an electric motor, offering riders an enhanced experience. The burning question on many minds: just how swift can an e-bike be? Let’s delve deeper to uncover the answer.

How Fast Does An Electric Bike Go?

Understanding the Basics of E-Bike Speed

Understanding the basics of e-bike speed involves differentiating between the top assisted speed and the overall top speed. Here’s an updated and more detailed explanation based on the latest regulations and guidelines:

Top Assisted Speed

The top assisted speed refers to the maximum speed an e-bike can achieve with the help of its motor. Various regions have distinct regulations governing the top assisted speed of e-bikes:

  • United States:
    • Class 1 e-bikes are pedal-assist only, with no throttle, and have a maximum motor-assisted speed of 20 mph.
    • Class 2 e-bikes have both pedal-assist and throttle-assist, also with a maximum motor-assisted speed of 20 mph.
    • Class 3 e-bikes, also known as speed pedelecs, are pedal-assist only, with no throttle, and have a maximum motor-assisted speed of 28 mph​1​.
  • European Union:
    • Pedelecs (pedal electric cycles) have a maximum speed of 25 km/h (15.5 mph) with a motor output limited to 250 Watts.
    • S-pedelecs (speed pedelec) have a maximum speed of 45 km/h (28 mph) with a motor output limited to 4000 Watts​2​.
    • In certain EU countries like Belgium and France, the maximum speed authorized is 15.5 mph for slow e-bikes, with speed pedelecs or quick-assist bicycles also authorized under specific conditions​3​.
  • United Kingdom:
    • Similar to the EU, e-bikes in the UK have a maximum assisted speed of 15.5 mph (25 km/h), beyond which traditional pedaling is essential​4​​5​.

Overall Top Speed

The overall top speed is the maximum speed an e-bike can achieve when combining pedal power and motor assistance. Essentially, a rider could potentially surpass the top assisted speed if they pedal vigorously. However, the actual top speed can be influenced by several factors such as the rider’s weight, the terrain, and the battery charge.

In essence, the regulations governing e-bike speeds are designed to ensure safety on the roads while also creating a consistent framework for manufacturers and consumers. These regulations might vary slightly depending on the specific jurisdiction, hence it’s advisable for e-bike owners and riders to familiarize themselves with the laws governing e-bike use in their respective regions.

How Fast Does An Electric Bike Go?

Factors Affecting E-Bike Speed

The speed of an e-bike can be influenced by a myriad of factors. Here’s an enriched and detailed breakdown based on the information sourced:

Motor Power

The motor’s power, usually measured in watts (W), plays a pivotal role in determining an e-bike’s acceleration, i.e., how quickly the bike reaches a certain speed. However, the motor power does not directly affect the top speed of the e-bike but rather how swiftly it can reach that speed​1​.

  • Motor Type: Different types of motors, such as hub motors or mid-drive motors, may influence the bike’s performance differently.
  • Motor Placement: Whether the motor is placed on the front wheel, rear wheel, or at the bike’s center can also affect its speed.

Battery Life and Capacity

  • Battery Voltage and Capacity: The larger the battery capacity, the longer the range of the electric bike, which may also provide a larger current output, enhancing the power performance of the e-bike and potentially achieving a higher maximum speed​2​​3​.

Terrain and Riding Conditions

  • Terrain Type: Riding on smooth asphalt may allow for higher speeds compared to rough trails.
  • Weather Conditions: Riding against strong winds can significantly reduce an e-bike’s speed, whereas tailwinds can increase it. Additionally, wet or icy conditions can also affect the bike’s speed and overall performance​4​.

Rider Weight and Aerodynamics

  • Rider Weight: A heavier rider might need more power to maintain the same speed as a lighter rider​3​.
  • Aerodynamics: The rider’s position, clothing, and the bike’s design can affect aerodynamics, which in turn influences the bike’s speed.

Pedal Assistance

  • Pedal Requirements: The extent to which a rider pedals can impact the overall speed, especially in e-bikes that require pedaling to engage the motor​5​.


  • Gear Ratios: The gear ratios of an e-bike can also affect its speed, allowing for faster speeds or better climbing capabilities based on the settings.
  • Tire Type and Pressure: Properly inflated tires with less rolling resistance can contribute to higher speeds.

These factors interplay in complex ways to determine the actual speed an e-bike can achieve under various conditions.

How Fast Does An Electric Bike Go?

E-Bikes vs. Traditional Bicycles: A Comprehensive Comparison

Traditional bicycles have been a staple of transportation and recreation for over a century, solely depending on the rider’s physical prowess. In professional circuits, these bicycles can reach remarkable speeds, showcasing the peak of human athletic capability.

However, in the context of daily commuting and urban traversal, e-bikes are becoming increasingly popular. Their integrated electric motors provide an added boost, enabling riders to maintain consistently higher speeds over extended routes. This not only ensures quicker commutes but also reduces physical exertion, making it ideal for longer distances or hilly terrains.

For those considering an upgrade or a switch, it’s essential to weigh the pros and cons of each, considering factors like distance, terrain, and individual fitness levels.

Pros and Cons of E-Bike Speed

E-bikes offer many advantages, but there are also considerations to keep in mind:


  1. Consistent Speeds: E-bikes can maintain a consistent speed, making commutes more predictable.
  2. Ease of Use: They provide assistance, making it easier for riders to tackle challenging terrains or longer distances.
  3. Flexibility: Riders can choose when to use the motor, offering a blend of exercise and convenience.


  1. Battery Dependency: E-bikes rely on battery life. If the battery runs out, the rider will have to pedal without assistance.
  2. Weight: E-bikes are generally heavier than traditional bikes due to the motor and battery.
  3. Cost: They can be more expensive initially, though potential savings in transportation costs can offset this.

Conclusion: Is an E-Bike Right for You?

The speed of an e-bike can be a significant advantage for many riders, especially those looking to commute or tackle challenging terrains. However, it’s essential to consider the factors affecting speed and whether the benefits align with your needs. If you’re seeking a blend of exercise and convenience, an e-bike might be the perfect solution.

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