ADDTECH | Ebike Mechanical Components - Frame

By Addmotor | 26 April 2024 | 0 Comments
The frame of an ebike is essential for its functionality, performance, comfort, and overall riding experience. As the foundation upon which all other ebike parts are mounted, the frame’s design directly influences the bike’s handling, stability, and ability to navigate various terrains.
Therefore, if you are planning to buy an e-bike, learning about ebike frames before moving forward is essential. In this article, we explore different ebike frame structures, examining their unique advantages and disadvantages to help you make an informed decision.
So, keep reading to find the perfect ebike for your needs.

Exploring the Different Types of E-Bike Frame

Electric bike frames come in various shapes, sizes, and styles. Some of the most common types of frames include:

1. Cargo Frame:

Cargo ebike frames are designed with utility in mind, accommodating heavy loads while maintaining stability. Typically, these frames are stiff enough to handle the weight, featuring a large rear rack, strong steel tubes, adjustable seat posts, and a wide base for stability.
Some cargo bike frames can even fit extra seats for adults or kids. Take the Addmotor Garootan M-81, for instance; it's tough and has a built-in rear rack for a larger carrying capacity. It's perfect for carrying your loved ones and your stuff around town or out in nature. With 400 lbs of payload capacity, it's great for people who need something practical and powerful.
These frames excel in urban environments, offering ample space for groceries, packages, or even a furry companion or product delivery.
♦ Ideal for those who want a sturdy and reliable option for carrying heavy loads.
♦ Can be a substitute for a car on short trips, which is good for the environment.
♦ Often come with customizable cargo areas.
♦ The long back rack adds stability, even with lots of weight.
♦ They're big and less agile than other bikes.
♦ Might be tricky to maneuver in tight spots or store away.

2. Folding Frame:

Compact and versatile, folding ebike frames are perfect for city commuters and travelers who have limited storage or need to move around easily. These bikes can be easily collapsed in seconds, making them simple to store in apartments, offices, or vehicles.
In the past, folding bikes were heavy and awkward, but now they're lighter and more compact thanks to better materials and engineering. Just like the Addmotor Foldtan M-140, for example; it's made for city life and traveling light.
Its lightweight build and folding feature make it fit right into your daily routine, especially handy for navigating busy streets or storing in tight spots. Its compact size of 44*21*29" along with its ability to fold, make it effortless to carry along wherever you go. Plus, its powerful 750W motor and impressive range of over 100 miles per charge ensure you enjoy a smooth ride, no matter where you're headed.
♦ Perfect for city commuters who need to store their ebikes in small places or carry them on public transport.
♦ Takes up less storage space.
♦ Easy to bring along on buses or trains.
♦ Lets you switch between biking and other transportation options effortlessly.
♦ Might not be as sturdy as regular frames.
♦ Offers fewer mounting points to attach accessories.

3. Step-Through Frame:

Step-through frames, also known as open frames or low-step frames, are all about accessibility. They're designed to make it easy for riders of any age or physical ability to hop on and off. These frames have a sloping top tube that lets you step through the bike, which is handy for those with limited mobility or for city riding.
The Grandtan II Etrike from Addmotor; it's got a Swan-Inspired Step Through Frame. This not only adds style but also makes it more attractive and easier to get off and on.
Perfect for riders of all ages, especially those with limited mobility or wearing skirts/dresses.
♦ Really easy to mount and dismount.
♦ Can carry cargo easily, especially with a trailer attached.
♦ Offers a comfy riding position, reducing strain on the hips and back.
♦ Perfect for city commuting, leisurely rides, or running errands around town.
♦ Tends to be heavier and less maneuverable than bikes with high steps.
♦ Not the best choice for rough terrain.

4. Step-Over Frame:

Traditional in design, step-over ebike frames offer a classic riding experience characterized by stability and control. These e-bike frames are typically lightweight and easier to maneuver.
Step-over bikes require riders to swing their leg up and over the back wheel to straddle the frame and reach the seat. This is due to the diamond or triangle-shaped frame construction, which features a top tube running from the front of the bike, just below the head tube, to the back wheel.
With a sturdy step-over design, the Addmotor Triketan M-350 Etrike combines classic style with modern functionality. Its versatile and reliable design appeals to riders who prioritize stability and control over various terrain types.
♦ Offers enhanced structural integrity and stability, especially on challenging terrain.
♦ More robust compared to step-through bikes.
♦ Provides better power transfer and responsiveness.
♦ A higher center of gravity fosters a sense of control and confidence.
♦ Easy to install racks, fenders, and other accessories.
♦ Well-suited for tough terrain.
♦ Requires more effort to mount and dismount.
♦ Riders need to lift their legs higher to get on the bike.

5. Semi-Recumbent Frame:

Blending comfort with efficiency, semi-recumbent ebike frames redefine the cycling experience. This frame design provides a laid-back riding position that eases strain on the back, neck, and shoulders, making it ideal for long-distance tours or leisurely rides.
Plus, by lowering the rider’s center of gravity, these frames provide a relaxed posture, reducing strain on the back and joints during longer rides.
The Arisetan II M-360 Etrike is a prime example, embracing a semi-recumbent stance to redefine the ebike journey. Designed for comfort and leisure, it's perfect for scenic rides or casual outings, ensuring rider comfort while maintaining top-notch performance.
♦ Enhances stability and control, ensuring a smooth and steady journey.
♦ Improves visibility and safety in traffic, thanks to the upright position.
♦ More aerodynamic than traditional bikes.
♦ Offers higher speeds on flat surfaces, perfect for covering long distances quickly.
♦ May sacrifice some agility and responsiveness compared to traditional upright frames.
♦ Poses challenges in terms of storage and transportation.

Different Types of Material for E-Bike Frames

When it comes to eBike frames, e-bike frames don't just differ in terms of style. They are made from different materials, like aluminum, carbon fiber, and steel. Let's break down each one and see what they offer.


Aluminum is a super popular and widely used material for ebike frames. About 80% to 90% of e-bikes out there use aluminum frames, including the ones from Addmotor. The best part is that at Addmotor we design our e-bike frames by ourselves, ensuring unique offerings in the competitive market.
Aluminum frames are known for being both lightweight and strong. They strike a good balance between durability and agility. Plus, aluminum is affordable, so you can get a solid bike without emptying your wallet.
It's great for city riders and folks who want a sturdy bike without it being too heavy. The only downside is it can rust faster than some other materials, but with proper care, you can keep it in top shape.

Carbon Fiber:

Engineered for performance, carbon fiber frames boast unparalleled strength-to-weight ratios. This is why competitive cyclists and bike enthusiasts love them. Unlike metal frames, carbon fiber won't rust, as it's made from carbon sheets mixed with resin, creating a strong polymer.
Carbon fiber is even stronger than aluminum and much lighter, making it perfect for high-end bikes. Plus, it's durable and great at absorbing shock, which is why it's often used in pricey mountain bikes and road bikes.
If you're into long rides and want a bike that feels light and premium, carbon fiber is worth considering. It'll make a big difference in how your bike feels, how far it can go, and how well it performs. However, due to the high cost, this frame’s ebike might not be ideal if you're on a tight budget, even though its exceptional performance.


Not as common for ebike frames nowadays, but it's still around. It's a bit heavier than aluminum or carbon fiber, but it gives you a smooth and comfortable ride. These frames are perfect if you're all about comfort and want your bike to last a long time.
One big plus of steel frames is their ability to absorb shock and resist fatigue. That's why you still see them on some cross-country bikes. That said, they're the easiest to fix if something goes wrong and usually the cheapest option.
However, because steel is heavy, it might not be the best choice for e bikes. Steel frames can weigh up to 100 pounds, which isn't ideal for zipping around town. Plus, they can be pricey. So, if you're after a lightweight and budget-friendly ebike, steel might not be the way to go.


Choosing the right electric bike frame is crucial for ensuring durability, comfort, performance, and a long-lasting, enjoyable riding experience.
By understanding the different frame types and materials, you can make informed decisions that align with your demands for commuting.
Whether you're navigating through busy city streets or embarking on scenic adventures, the right ebike frame will set the stage for a memorable ride.


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