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Trek FX Plus 1S Midstep specifications and in-depth review

Trek FX Plus 1S Midstep

Manufacturer: Trek

The Trek FX Plus 1S Midstep is a flat-bar electric bike built around a lightweight aluminum frame with clean lines courtesy of fully internal cable routing and an integrated in-frame battery. Designed for adult riders, it takes a practical, no-nonsense approach to urban and fitness cycling, pairing a 500W mid-drive motor with an 8-speed drivetrain to deliver a riding experience that feels closer to a conventional bike than many e-bike alternatives.

Power comes from a 520 Wh removable battery that supports a maximum range of 80 km per charge and can be replenished in around 5.5 hours. The motor produces up to 60 Nm of torque and reads rider input through both a cadence sensor and a torque sensor, with dedicated eco and turbo assist modes available. Stopping is handled by hydraulic disc brakes, and the bike reaches a top assisted speed of 45 km/h. Integrated front and rear lights, a handlebar display, and compatibility with a dedicated smartphone app round out the feature set, while GPS and anti-theft systems are not included.

Pros
  • The removable in-frame battery allows for convenient off-bike charging without needing access to a power outlet near the bike itself
  • Hydraulic disc brakes provide reliable stopping power across varying riding conditions
  • Both a cadence sensor and torque sensor work together to deliver more responsive and natural-feeling pedal assistance
  • An 8-speed drivetrain gives riders meaningful control over their cadaling effort across different terrain gradients
  • Integrated front and rear lights are built into the bike, removing the need for separately purchased lighting accessories
  • Internal cable routing keeps the frame looking clean and reduces exposure of cables to external wear
Cons
  • At 22,000 g, the bike is relatively heavy, which can make lifting, carrying, or storing it more cumbersome
  • No GPS is included, so location tracking or navigation support is absent
  • The lack of any anti-theft features or built-in lock means riders must rely entirely on separately sourced security solutions
  • The frame has no suspension, which may result in a less comfortable ride on uneven or rough road surfaces
  • Regenerative braking is not supported, so no energy is recovered during deceleration
Who is this for?

This bike suits adult riders who want a capable, everyday electric bike for commuting or fitness riding on paved and light mixed-surface routes. The combination of a 500W mid-drive motor with both cadence and torque sensing makes it well-matched for riders who want assist that feels natural and responsive rather than intrusive. The 8-speed drivetrain and 80 km range per charge also make it a solid fit for those covering longer daily distances, while the integrated lights and removable battery add practical convenience for riders who need to charge away from their bike.

Who is this NOT for?

Riders looking for off-road or trail capability will find this bike poorly suited to that purpose, as it has no suspension front or rear, which limits comfort and control on rough or uneven terrain. Those who need GPS tracking or anti-theft protection built into the bike will need to look elsewhere, since neither feature is included. At 22,000 g, the bike is also not a good fit for anyone who regularly needs to carry it up stairs or load it onto public transport, and its non-folding frame further limits its appeal to riders with restricted storage space.

Design:

frame material Aluminum
weight 22000 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 Midstep is built around an aluminum frame with a total weight of 22,000 g, and it features internal cable routing for a tidier appearance along with an integrated in-frame battery that keeps the overall profile clean. The frame is a rigid design with no front or rear suspension, and the bike is neither foldable nor intended for children. These design choices reflect a straightforward, adult-oriented build focused on practicality over complexity.

Battery:

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

The bike is equipped with a 520 Wh battery that takes approximately 5.5 hours to fully charge, and it features a removable design that allows the battery to be taken off the bike for convenient indoor charging. Regenerative braking is not supported, so energy recovery during deceleration is not a feature of this system.

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 Mid-drive motor
top speed 45 km/h

Propulsion comes from a 500W mid-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. The motor offers both eco and turbo assist modes, giving riders control over how aggressively they draw on battery power. Gearing is handled by an 8-speed drivetrain — the bike is strictly a multi-gear setup with no single-gear option. Hydraulic disc brakes take care of stopping duties across all 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 bike reads pedaling input through a combined cadence sensor and torque sensor, allowing the motor to respond to both pedaling speed and effort simultaneously. A handlebar display is included for on-the-go ride data, and the bike is compatible with a dedicated smartphone app. Integrated front and rear lights are fitted as standard. GPS tracking, anti-theft features, and a built-in lock are not part of the specification.

Final Verdict

The Trek FX Plus 1S Midstep is a well-specified adult electric bike that covers the essentials of urban and fitness riding without unnecessary complexity. Its mid-drive motor paired with dual cadence and torque sensing gives it a natural, responsive ride feel that sets it apart from more basic assist systems, and the 80 km range alongside a removable 520 Wh battery makes it genuinely practical for daily use. The absence of suspension, GPS, and anti-theft features does narrow its appeal — this is not a bike for rough terrain or riders who need built-in security — but within its intended scope of smooth-surface commuting and fitness riding, it delivers a coherent and capable package that holds up well on paper.