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AIMA Big Sur specifications and in-depth review

AIMA Big Sur

Manufacturer: AIMA

The AIMA Big Sur is an electric bike built around an aluminum frame with internal cable routing and a fully integrated in-frame battery setup. It comes equipped with front suspension and is designed for adult riders looking for a capable, feature-rich e-bike. A dedicated smartphone app adds a layer of connectivity, while front and rear lights make it suitable for varied riding conditions.

At the heart of the Big Sur sits a 750W mid-drive motor delivering up to 80 Nm of torque, paired with a 720 Wh removable battery that offers a maximum range of 97 km per charge and replenishes in around 5 hours. The bike reaches a top speed of 45 km/h and supports multiple riding modes including turbo and eco. Shifting is handled through a multi-gear drivetrain, braking through hydraulic disc brakes, and pedal assistance is managed via a combined cadence and torque sensor system.

Pros
  • The removable 720 Wh battery makes it easy to charge away from the bike and simplifies battery replacement over time
  • A mid-drive motor with 80 Nm of torque delivers assistance that feels balanced and responsive across varied terrain
  • Both turbo and eco riding modes give riders meaningful control over how they use the available power
  • Hydraulic disc brakes provide reliable stopping performance regardless of weather or riding conditions
  • Internal cable routing and an integrated in-frame battery contribute to a cleaner, more streamlined frame appearance
  • Front and rear lights are built in, removing the need for separate lighting accessories
Cons
  • At 37,194 g, the bike is quite heavy, which can make handling, transport, and lifting a challenge
  • The absence of rear suspension may result in a less comfortable ride on rougher or uneven surfaces
  • No GPS is included, so navigation and location tracking require an external device or app workaround
  • The lack of any anti-theft features or a built-in lock means riders must carry and manage separate security solutions
  • The bike cannot be folded, limiting its practicality for users who need to store it in compact spaces or combine cycling with public transport
Who is this for?

The AIMA Big Sur is well-suited to adult riders who need a capable e-bike for longer daily commutes or extended rides, thanks to its 97 km maximum range and 720 Wh removable battery. The combination of a mid-drive motor, multi-gear drivetrain, and both turbo and eco modes makes it a practical choice for riders who encounter varied terrain or changing energy demands throughout their trips. Those who value a tidy, integrated build will also appreciate the internal cable routing and in-frame battery, along with built-in front and rear lights that make the bike ready for low-light commuting without additional accessories.

Who is this NOT for?

At nearly 37.2 kg, this bike is not a practical option for anyone who regularly needs to carry it up stairs, load it onto public transport, or store it in tight spaces — and the non-folding frame further limits its portability. Riders who frequently tackle rough, uneven, or off-road surfaces may find the experience uncomfortable given the absence of rear suspension. It is also not a strong fit for users who rely on integrated GPS for navigation or require built-in security features, as the bike includes neither GPS nor any anti-theft functionality or built-in lock.

Design:

frame material Aluminum
weight 37194 g
has front suspension ✓
has rear suspension ✕
has an in-frame battery ✓
can be folded ✕
has internal cable routing ✓
is designed for kids ✕

The AIMA Big Sur is built around an aluminum frame and weighs 37,194 g, making it a substantial, full-sized build aimed at adult riders. It features front suspension for absorbing road irregularities, though there is no rear suspension. The frame integrates the battery internally and routes cables inside the frame for a cleaner appearance, while the bike is neither foldable nor designed for children.

Battery:

battery size 720 Wh
charge time 5 hours
has a removable battery ✓

The AIMA Big Sur runs on a 720 Wh battery that provides a meaningful capacity for longer rides, and it supports a full charge in around 5 hours. The battery is removable, which adds convenience for charging away from the bike or swapping when needed.

Performance:

maximum distance per charge 97 km
braking system Hydraulic disc brakes
maximum torque 80 Nm
has a turbo mode ✓
has an eco mode ✓
motor power 750W
is a multi-gear bike ✓
is a single-gear bike ✕
drive motor type Mid-drive motor
top speed 45 km/h

The AIMA Big Sur is powered by a 750W mid-drive motor producing up to 80 Nm of torque, allowing it to reach a top speed of 45 km/h with a maximum range of 97 km per charge. It operates through a multi-gear drivetrain rather than a single-speed setup, and riders can choose between turbo and eco assistance modes depending on their needs. Stopping power comes from hydraulic disc brakes, which provide consistent and reliable deceleration across varying conditions.

Features:

pedal sensor type Cadence sensor & torque sensor
has anti-theft features ✕
has a built-in lock ✕
Has a display ✓
Has a dedicated smartphone app ✓
has GPS ✕
has front light(s) ✓
has rear light(s) ✓

The AIMA Big Sur uses a combined cadence and torque sensor to manage pedal assistance, offering a more responsive and natural riding feel. Riders have access to an onboard display and a dedicated smartphone app for monitoring and adjusting their ride. Both front and rear lights are included for visibility in low-light conditions. The bike does not feature GPS, anti-theft functionality, or a built-in lock.

Final Verdict

The AIMA Big Sur is a well-specified electric bike that covers a lot of ground — literally and technically. Its 750W mid-drive motor paired with a 720 Wh removable battery makes it a genuinely capable option for adult riders tackling longer commutes or varied daily routes, and the inclusion of hydraulic disc brakes, dual riding modes, and integrated lighting reflects a thoughtful approach to real-world usability. That said, its considerable weight and fixed frame design do place meaningful limits on how versatile it can be outside of regular point-to-point riding. For users whose priorities align with range, pedal-assist performance, and a clean integrated build, the AIMA Big Sur delivers a cohesive and well-rounded package — provided portability and off-road comfort are not primary concerns.