Aostirmotor Electric Bikes - Complete Ebike Lineup Review

May 05, 2024

Aostirmotor Electric Bikes - Really Good Ebikes

The rise of e-bikes offers a new dimension to outdoor adventures, with powerful motors conquering rough terrain and long-range batteries expanding possibilities. Aostirmotor Electric Bikes steps into this arena with a compelling focus: combining this powerful e-bike experience with affordability and a spirit of rider empowerment.

Key Takeaways

  • Aostirmotor challenges the perception that high-performance e-bikes need to be expensive, delivering powerful features at accessible price points.
  • With its wide range of models – urban, folding, mountain, and fat tire – Aostirmotor aims to become a one-stop shop for riders with diverse needs.
  • Customer feedback indicates satisfaction with Aostirmotor's value proposition, specifically with the robust builds and powerful performance of the S18-1500W, S17-1500W, and S18-750W.
  • Aostirmotor encourages rider-led customization, allowing users to personalize their e-bikes to perfectly suit their style and intended use.

This article puts Aostirmotor Electric Bikes to the test. Can their focus on affordability and performance truly compete in the e-bike market? We examine their technology and see if the hype matches reality. 

About Aostirmotor

While Aostirmotor might not be a household name yet, they're quickly making waves in the e-bike industry with its commitment to quality, affordability, and powerful performance.

The exact origins of Aostirmotor are a little fuzzy, but their website tells us the story of a passionate founder with deep roots in the electric bicycle scene. This founder, driven by a desire to make the joy of cycling accessible to everyone, leveraged their experience in product development and production to create Aostirmotor's lineup.

Aostirmotor electric bikes


Aostirmotor's core values are clear: "power brings joy" and "sport gives happiness." This philosophy translates into their bikes, designed to conquer hills and extend your range and put a smile on your face with every ride.

In-Depth Review of Selected Aostirmotor Models

In this section, you’ll learn more about some of Aostirmotor's most popular models, comprehensively reviewing their features and performance and who they might be a perfect fit for.  

Aostirmotor S18-1500W Full-Suspension Fat Tire Electric Bike

The Aostirmotor S18-1500W is known for its motor, which is twice as powerful as most other e-bike motors. The rear hub motor has a nominal output of 1500 watts, giving the bike incredible climbing and towing ability. If you're a big guy, over 225 lbs, or you're going to be hauling a quarry trailer, then the S18-1500W is worth considering.

The heavy-duty 6061 aluminum alloy frame is full suspension, with a Zoom hydraulic fork with lockouts up front and a strong spring absorber in the rear. The frame geometry is 100% unique to Aostirmotor, with aerodynamic lines and an integrated (removable) battery pack. Fenders are included.

aostirmotor s18-1500w electric mountain bike

Paired with the 1500W motor is a long-range 48V/15Ah battery housed within the bike's frame. The battery can be removed for remote charging and to protect it against weather extremes. Under average riding conditions, this battery pack should give you about 36 miles of range per charge. You can extend your range by moderating how much throttle and pedal assist you use and by bringing a spare battery to swap out.

The S18-1500W offers a comfortable ride, although it does have a slightly forward riding posture and straight handlebars typical of electric mountain bikes. You can propel yourself under human power using the 7-speed Shimano drivetrain. And when you need a boost, you have access to a 5-level pedal assist system (PAS) and a right-side twist throttle. This allows you to find the perfect human and electric power combination for every riding condition.


  • Offers a comfortable ride even on rough terrains
  • 48V/15Ah battery gives about 36 miles of range per charge
  • Has a motor twice as powerful as most e-bike motors


  • The slightly forward riding posture uncomfortable
  • 36 miles per charge might be insufficient for extended trips
  • Bike's weight might be a concern for some users

Aostirmotor S17-1500W High-Powered Electric Mountain Bike

Like the S18-1500W, the S17-1500W boasts a full-suspension, heavy-duty aluminum alloy frame and a powerful rear hub motor with a nominal output of 1500W and 80 Newton Meters (Nm) of torque.

However, the S17-1500W features a long-range 48V/20Ah battery, providing the average rider with almost 50 miles of range per charge. This battery is fully integrated into the unique bike frame and can be removed for security and remote charging.

aostirmotor S17-1500w

One significant difference between the S17-1500W and the S18-1500W is the wheelsets. The S17-1500W has 26" x 3" mountain bike tires, while the S18-1500W has 26" x 4" fat tires. Choosing between these tire formats is a matter of personal preference. The narrower mountain bike tires offer more agility and lighter weight, while the fat tires provide increased traction and stability.

Opting for tires with greater traction boosts confidence, resulting in more enjoyable and faster progress as a rider. However, if speed is your priority, you might consider sacrificing some grip to enhance rolling efficiency.


  • Features a potent rear hub motor with 1500W output
  • Battery provides almost 50 miles of range per charge
  • Equipped with 26" x 3" mountain bike tires


  • Weight may impact maneuverability and portability
  • Motor's top speed may not be sufficient for riders seeking higher speeds

Aostirmotor S18 750W Full-Suspension Fat Tire Electric Mountain Bike

The S18 all-terrain fat tire electric mountain bike shares many design features with the S18-1500W, such as the unique full-suspension frame design, integrated/removable 48V/15Ah lithium-ion battery with Samsung cells, 7-speed Shimano drivetrain, 5-level pedal-assist system, and right side twist throttle.

aostirmotor s18 electric mountain bike

However, the main difference between these two models lies in the motor output. The S18 has a powerful 750W brushless rear hub motor and can reach a maximum assist speed of 28 mph.


  • Features a potent 750W brushless rear hub motor
  • Full-suspension frame design offers a comfortable ride
  • Battery provides decent range per charge


  • May not be suitable for riders seeking faster bikes
  • Price may still be a barrier for budget-conscious buyers

Aostirmotor S07 Fat Tire Electric Mountain Bike 

For an affordable fat-tire electric mountain bike, consider the S07 model from Aostirmotor. Unlike the other e-bikes reviewed above, the S07 doesn't have a full-suspension frame. Instead, it's equipped with hydraulic front shocks with lockouts and hardtails, meaning no rear shock absorber.

This model features a heavy-duty aluminum alloy diamond-shaped frame with slightly angled top tubes and a forward riding posture. It's powered by a 750W rear hub motor, providing an incredible boost when using the pedal assist system or twist throttle, along with a 48V/13Ah battery for extended travel range per charge.

aostirmotor s07 fat tire electric mountain bike

Equipped with a 7-speed Shimano Sunrace derailleur and trigger/click shifter on the right side next to the throttle, the S07 ensures smooth shifting across the cassette, allowing you to ride like a conventional mountain bike with human power alone.

Both models also feature a 5-level pedal assist system (PAS) with a speed sensor, while the twist throttle enables riding without pedaling, which is ideal for leisurely cruising. With mechanical disc brakes boasting 180mm front and 160mm rear rotors, you'll enjoy authoritative stopping power.

  • Offers an extended travel range per charge
  • Diamond-shaped frame and hydraulic front shocks with lockouts offer agile handling


  • Lacks a rear shock absorber
  • Forward riding posture may not be suitable for all riders

Aostirmotor A20 500W Fat Tire Folding E-bike With Twist Throttle

This e-bike features a central folding mechanism (hinge and clamp), with the tiller also folding down, making it highly portable and storable. It's a great ebike for RVers, outdoor enthusiasts, students, and anyone looking for a cheap, fun fat tire electric bike.

Riding a 20" fat tire e-bike is incredibly fun, especially when tackling off-road trails. The A20 excels on dirt and performs well on loose surfaces like sand, snow, and gravel.

aostirmotor s07 fat tire electric mountain bike

Despite being one of the least expensive e-bikes on the market, the Aostirmotor A20 fat folder packs a punch with a powerful 500W rear hub motor, a decent 36V/13Ah removable lithium-ion battery, 5 levels of pedal assist, and a precise variable speed twist throttle. It also features a 7-speed Shimano drivetrain for human-powered riding.

Additionally, the A20 is equipped with Tektro mechanical disc brakes front and rear, providing strong stopping power when needed.


  • Features a central folding mechanism
  • Affordable for its features


  • May not be sufficient for longer rides
  • Lack some advanced features found in higher-end e-bikes

Why Choose Aostirmotor Electric Bikes?

Aostirmotor has carved out a distinct niche in the e-bike market by offering a compelling combination of affordability and quality. Unlike some budget e-bikes that skimp on components or sacrifice performance, Aostirmotor prioritizes value without compromising the core riding experience.

Here are some key reasons why Aostirmotor e-bikes deserve a serious look:

1. Affordable

Let's face it: e-bikes can be a significant investment. While some high-end models can reach $5,000 or more, Aostirmotor's lineup starts at a much more attractive price point, typically well below $2,000. 

This makes e-bike ownership a realistic possibility for a broader range of riders, opening the door to the environmental and health benefits that e-bikes offer.

2. Excellent Performance

Affordability is just one piece of the puzzle. The actual test is whether Aostirmotor e-bikes deliver the quality and performance riders expect. Despite their focus on affordability, Aostirmotor doesn't compromise on performance. Their bikes boast powerful motors, long-lasting batteries, and reliable components, ensuring a smooth and enjoyable ride.

3. Innovation

Aostirmotor is constantly innovating and incorporating new technologies into their bikes. However, they understand that user-friendliness is critical. Their bikes are designed to be easy to operate and maintain, even for those new to the e-bike world.

4. Options

Aostirmotor doesn't subscribe to the "one size fits all" approach. Their lineup boasts diverse e-bikes designed to tackle various terrains and riding styles. 

Whether you're a city commuter craving a comfortable ride to work or a weekend warrior itching to explore off-road trails, there's likely an Aostirmotor e-bike that aligns with your needs.

Aostirmotor Electric Bikes

Here are some great options from the brand:

Urban E-bikes: These models prioritize comfort and convenience, featuring upright seating postures, wide tires for a stable ride, and features like fenders and lights for safe urban exploration.

Folding E-bikesPerfect for city dwellers with limited storage space, Aostirmotor's folding e-bikes offer exceptional portability without sacrificing performance.

Mountain E-bikes:For the adventurous rider, Aostirmotor's mountain e-bikes come equipped with powerful motors, knobby tires for superior traction, and suspension systems that can handle even the most challenging terrain.

Fat Tire E-bikesThese all-terrain champions provide exceptional stability and traction on various surfaces, from sand and snow to loose gravel and dirt paths.

Aostirmotor Accessories and Upgrades

Aostirmotor offers a variety of accessories and upgrades that can help you personalize your e-bike and tailor it to your specific needs. Whether you're looking to boost performance, enhance comfort, or increase your bike's utility, there's likely an Aostirmotor accessory waiting to elevate your riding experience.

Higher Capacity Battery:For extended-range adventures, consider upgrading to a higher-capacity battery. This will allow you to explore further on a single charge.

More Powerful Motor: If you crave even more power, some Aostirmotor models are compatible with aftermarket motor upgrades. However, it's crucial to ensure compatibility and consult a qualified technician for installation.

Upgraded Seat:A comfortable seat is key for longer rides. Aostirmotor offers a variety of gel or memory foam seat options to provide superior comfort and support.

Suspension Upgrades:For riders who tackle rough terrain, a suspension upgrade can significantly improve comfort and control. Aostirmotor offers front fork or full suspension upgrades for select models.

Cargo Racks and Bags: Transform your Aostirmotor e-bike into a capable cargo carrier with a rear rack and a pannier bag. This is perfect for carrying groceries, errands, or even camping gear.

Aostirmotor cargo rack

Lights and Reflectors: Enhance your visibility and safety with additional lights and reflectors, especially if riding in low-light conditions.

Fenders: Protect yourself from mud and water spray with fenders. This is particularly useful for riding in wet or muddy conditions.

Buying Guide: Choosing the Right Aostirmotor Bike for You

So, you're excited about the possibilities that Aostirmotor e-bikes offer, but selecting the perfect model can feel overwhelming with a diverse lineup. This section provides some key considerations to guide you toward the ideal Aostirmotor e-bike for your needs, budget, and riding style.


Consider the type of terrain you'll be riding most often. For city commuting, a comfort-focused urban e-bike might be ideal. If you crave off-road adventures, a mountain e-bike with fat tires and a powerful motor is the way to go. Aostirmotor offers a variety of models to suit different riding styles.


E-bikes can range significantly in price. Aostirmotor's strength lies in offering high-quality e-bikes at competitive prices. Determine your budget and choose a model that delivers the needed features without breaking the bank.


Think about how far you typically ride on a single trip. Aostirmotor e-bikes offer a variety of battery capacities, translating to different ranges. Choose a battery capacity that will comfortably cover your typical riding distance.

Here's a helpful tip: When considering range, remember that factors like terrain, wind resistance, and rider weight can all affect battery life. Choosing a battery with a little extra capacity to account for these variables is always a good idea.

Aostirmotor - Your Gateway to E-Powered Adventure

Aostirmotor is proving that e-bikes don't have to be a luxury purchase. Their lineup offers a fantastic blend of affordability, functionality, and pure riding joy. If you've been hesitant about the cost of entering the e-bike world, Aostirmotor's models show that performance and budget-consciousness can happily coexist.

If you're looking for an electric mountain bike that combines affordability with impressive performance, Aostirmotor is a brand definitely worth considering. Their diverse lineup boasts powerful motors, long-lasting batteries, and features designed to tackle even the most challenging off-road terrain.  

Aostirmotor ebikes


Are Aostirmotor bikes suitable for various terrains?

Absolutely! Aostirmotor offers a diverse lineup designed for various terrains and riding styles. They have urban e-bikes, folding e-bikes, mountain e-bikes, and fat tire e-bikes: all-terrain champions providing exceptional stability and traction on sand, snow, gravel, and dirt paths.

How does Aostirmotor's pricing compare in the market?

Aostirmotor stands out for offering high-quality e-bikes at competitive prices. The Aostirmotor's lineup typically starts well below $2,000, making them a more accessible option for a wider range of riders.

Can Aostirmotor e-bikes be ridden in the rain?

Some Aostirmotor models come equipped with fenders and water-resistant components, making them suitable for riding in light rain. However, riding any e-bike in heavy downpours is generally not recommended. Water exposure can damage electrical components and compromise safety. Refer to your Aostirmotor user manual for specific recommendations on riding in wet conditions.

How fast can Aostirmotor e-bikes go?

E-bike speed regulations vary depending on your location. Aostirmotor e-bikes are typically designed to comply with local regulations, often offering speeds limited to 20-25 mph (32-40 km/h) with pedal assist. It's important to familiarize yourself with local e-bike speed regulations before riding. 

1 Response

Reggie Mills
Reggie Mills

September 02, 2021

Excellent blog post as usual. I was not familiar with this brand and the information provided in this blog is really helpful. I really love the look of these bikes and I took a look at them on your website, the prices are awesome. I am definitely interested in this brand for my next bike. I am really happy I found this blog and really grateful you took the time to write it.

Leave a comment

Comments will be approved before showing up.

Also in Really Good Ebikes: Electric Bike Blog

two Velowave Electric Bikes
Velowave Electric Bikes - The Ultimate Lineup Review

May 21, 2024

Read More
Are eletric bikes waterproof?
Are Electric Bikes Waterproof? Understanding the Water Resistance of E-Bikes

May 08, 2024

Read More
Best Ebike Conversion Kits: The Ultimate Guide

May 07, 2024

Read More