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Trek FX Plus 1S specifications and in-depth review

Trek FX Plus 1S

Manufacturer: Trek

The Trek FX Plus 1S is an aluminum-frame electric bike built around a clean, integrated design with internal cable routing and an in-frame battery that keeps the overall silhouette streamlined. It runs on a 500W hub-drive motor and supports multiple assist modes, including turbo and eco, giving riders flexibility across a range of riding conditions. The bike carries 8 gears and is equipped with hydraulic disc brakes, making it a capable option for everyday commuting or longer recreational rides.

On the technical side, the Trek FX Plus 1S draws from a 520 Wh battery with a charge time of approximately 5.5 hours and a stated maximum range of 80 km per charge. The motor delivers up to 60 Nm of torque and supports a top assisted speed of 45 km/h. Rider interaction is handled through a combination of cadence and torque sensors, while an onboard display and a dedicated smartphone app provide access to ride data. The bike also includes integrated front and rear lighting, though it does not feature GPS or a removable battery.

Pros
  • Hydraulic disc brakes provide reliable and consistent stopping power across varying conditions
  • Both turbo and eco assist modes offer flexibility in managing speed and battery consumption
  • The combination of cadence and torque sensors enables more responsive and natural pedal assist
  • Integrated front and rear lights are built into the bike, removing the need for separate accessories
  • Internal cable routing contributes to a cleaner frame appearance and reduces exposure to dirt and wear
  • The 8-speed drivetrain gives riders a meaningful range of gearing options for different terrain and gradients
Cons
  • The battery is non-removable, meaning the entire bike must be brought to a power source for charging
  • At 22,100 g, the overall weight is considerable, which can make handling or transporting the bike off-road more demanding
  • There is no GPS built in, so location tracking and navigation rely entirely on a paired smartphone
  • The absence of any suspension means the ride may feel harsh on uneven or rough road surfaces
  • An 80 km maximum range per charge may be limiting for longer rides without access to a charging point
Who is this for?

This bike is well-suited to adult commuters and recreational riders who want a clean, capable electric bike for urban and paved-road use. The 8-speed drivetrain, 500W hub-drive motor, and dual assist modes make it a practical choice for riders covering moderate daily distances, while the integrated front and rear lights add convenience for commuting in low-light conditions. Those who prefer a tidy, low-maintenance setup will appreciate the internal cable routing and in-frame battery, and the dedicated smartphone app and onboard display make it accessible for riders who want basic connectivity without complexity.

Who is this NOT for?

Riders looking to tackle rough terrain or off-road trails will find this bike poorly equipped, as it has no front or rear suspension to absorb impact from uneven surfaces. The fixed, non-removable battery makes charging less flexible, which is a drawback for those who need to charge away from the bike or want to carry a spare. At over 22 kg, the bike's considerable weight makes it impractical for anyone who regularly needs to carry it upstairs, load it onto public transport, or store it in tight spaces. Riders who depend on built-in navigation will also find the lack of GPS a meaningful limitation.

Design:

frame material Aluminum
weight 22100 g
has front suspension ✕
has rear suspension ✕
has an in-frame battery ✓
can be folded ✕
has internal cable routing ✓
is designed for kids ✕

The Trek FX Plus 1S is built around an aluminum frame with a total weight of 22,100 g, and features internal cable routing for a cleaner aesthetic. The battery is integrated directly into the frame, contributing to a more cohesive profile. The bike lacks both front and rear suspension, and it is not designed to fold. It is intended for adult use and not designed for kids.

Battery:

battery size 520 Wh
charge time 5.5 hours
Has regenerative braking ✕
has a removable battery ✕

The bike is powered by a 520 Wh battery that requires approximately 5.5 hours to reach a full charge. The battery is fixed within the frame and cannot be removed, so charging must be done on the bike itself. Regenerative braking is not supported.

Performance:

maximum distance per charge 80 km
braking system Hydraulic disc brakes
maximum torque 60 Nm
has a turbo mode ✓
has an eco mode ✓
motor power 500W
is a multi-gear bike ✓
number of gears 8
is a single-gear bike ✕
drive motor type Hub-drive motor
top speed 45 km/h

The bike is driven by a 500W hub-drive motor delivering up to 60 Nm of torque, with a top assisted speed of 45 km/h and a maximum range of 80 km per charge. It supports both turbo and eco assist modes, giving riders control over how aggressively they use the motor. Stopping power comes from hydraulic disc brakes. The drivetrain features 8 gears, making it a multi-gear setup rather than a single-speed configuration.

Features:

pedal sensor type Cadence sensor & torque sensor
Has a display ✓
Has a dedicated smartphone app ✓
has GPS ✕
has front light(s) ✓
has rear light(s) ✓

Pedal assist is managed through a combined cadence and torque sensor, allowing the motor to respond to both pedaling rhythm and applied force. The bike includes an onboard display and pairs with a dedicated smartphone app for additional ride data and settings. Integrated front and rear lights are fitted as standard, while GPS is not included.

Final Verdict

The Trek FX Plus 1S is a well-specified electric bike built around a clean aluminum frame, a capable 500W hub-drive motor, and a thoughtfully integrated feature set that suits adult riders focused on urban commuting and paved recreational routes. Its hydraulic disc brakes, dual assist modes, and combined cadence and torque sensing give it a solid technical foundation for everyday use, while the internal cable routing and integrated lighting reflect a design priority toward practicality and tidiness. That said, the fixed battery, lack of suspension, and substantial weight mean it is best appreciated by riders whose needs align with smooth-surface riding and accessible charging. For that audience, the FX Plus 1S delivers a coherent and capable package that holds up well against the demands of regular use.

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