TTrek’s Lightest City E-Bike
First, the TREK FX+2 Commuter Bicycle is designed to make everyday excursions faster and more fun . As a result, it has become Trek’s lightest city e-bike , weighing just 17.69 kg (38.99 lbs) for a size medium . Consequently, it’s easier to maneuver while parking and less of a pain to carry up stairs .
Natural-Feeling Hub Drive Motor
Moving on to performance, the FX+2 is powered by a HyDrive rear hub motor producing 250W of power and 40Nm of torque . Furthermore, the TREK FX+2 Commuter Bicycle delivers a natural, intuitive pedal-assist feel — rather than a sudden “kick,” the assistance comes on smoothly . Therefore, it’s ideal for riders who want a seamless boost, not a jerky machine .
250Wh Integrated Battery with Range Extender Option
In addition, the 250Wh internal battery is seamlessly hidden inside the downtube . As a result, the TREK FX+2 Commuter Bicycle provides up to 35 miles (67 km) of range on a single charge . However, if you need more distance, you can add the optional 250Wh plug-and-play Range Extender battery, which attaches to water bottle mounts . Thus, you can double your range to 70 miles .
Lightweight Alpha Gold Aluminum Frame
Similarly, the Alpha Gold Aluminum Frame features internal cable routing for a sleek, clean look and protection from the elements . Moreover, the TREK FX+2 Commuter Bicycle includes rack and mudguard mounts, a kickstand mount, and post-mount disc brake compatibility . For this reason, this bike is ready for daily use from day one.
9-Speed Shimano Altus Drivetrain
Another key feature is the Shimano Altus 9-speed drivetrain (M2010 shifter, M2000 long cage derailleur), which gives you a wide range of gears for varied terrain . Specifically, the 11-36T cassette paired with a 42T narrow-wide chainring provides climbing gears for hills and taller gears for flats . Additionally, the chain is KMC E9S, 9-speed, designed specifically for e-bike use .
Hydraulic Disc Brakes for All-Weather Stopping
When it comes to safety, Promax DSK-927 hydraulic disc brakes with 160mm rotors deliver reliable, fade-free stopping power in wet or dry conditions . As a result, the TREK FX+2 Commuter Bicycle stops confidently on steep descents or slick city streets, with flat-mount integration for a clean appearance.
Complete Commuter Package Included
What’s more, this model comes ready to ride straight from the box with essential commuter accessories included :
- Herrmans MR4 120-lumen LED front light — battery-powered, so you never need disposable batteries
- Spanninga Solo rear light — integrated taillight for visibility
- SKS plastic fenders — full coverage front and rear
- MIK-compatible alloy rear rack — easily attach compatible bags and baskets
- Pletscher Comp 18 kickstand — heavy-duty alloy stand
Consequently, you don’t need to spend hundreds more on accessories .
700x40c Tires with Reflective Sidewalls
Furthermore, Bontraker H2 Comp tires (700x40c) feature reflective strips for enhanced nighttime visibility and a wire bead for durability . Moreover, the TREK FX+2 Commuter Bicycle can accommodate tires up to 700x50c without fenders or 700x45c with fenders . Thus, you have flexibility for different riding conditions.
Simple Bluetooth Display
In addition, a Bluetooth-connected display communicates with the motor system, showing battery level and assist settings via a simple handlebar remote . Therefore, the TREK FX+2 Commuter Bicycle keeps things simple—no complex menus, just intuitive ride information.
Torque Sensor for Natural Pedaling
Unlike budget e-bikes that use basic cadence sensors, the FX+2 features a torque sensor that measures how hard you’re pedaling and delivers proportional assistance . As a result, the ride feels natural and responsive—you’re still in control, just with superhuman legs .
Fork and Frame Design
Additionally, the FX+ alloy fork features internal brake routing, fender mounts, rack mounts, and a ThruSkew 5mm bolt-on skewer . When combined with the frame’s internal cable routing and sleek integration, the TREK FX+2 Commuter Bicycle presents a clean, premium appearance.
Charging and Maintenance
Furthermore, the 2A charger (42V output, 100V-240V AC input) fully recharges the battery in several hours . Moreover, the threaded bottom bracket (T47, 122.5mm spindle) is more robust and easier to service than press-fit designs . Finally, the frame has a maximum total weight limit of 136 kg (300 lbs), combining bike, rider, and cargo .
Sizing and Fit
Likewise, the FX+2 is available in four sizes to fit riders from 5’1″ to 6’6″ :
| Size | Rider Height | Inseam |
|---|---|---|
| S | 5’1″ – 5’5″ (155-165 cm) | 28″ – 31″ (72-78 cm) |
| M | 5’5″ – 5’9″ (165-175 cm) | 30″ – 33″ (77-83 cm) |
| L | 5’9″ – 6’1″ (175-186 cm) | 32″ – 35″ (82-88 cm) |
| XL | 6’1″ – 6’6″ (186-197 cm) | 34″ – 37″ (87-93 cm) |
Therefore, almost any rider can find their perfect fit .
Pros:
- Lightest city e-bike from Trek (17.69 kg / 38.99 lbs)
- 250Wh integrated battery (35-mile range, optional 70-mile extender)
- 40Nm HyDrive rear hub motor
- Natural-feeling torque sensor (not basic cadence)
- Shimano Altus 9-speed drivetrain (11-36T, 42T chainring)
- Hydraulic disc brakes (160mm rotors)
- 700x40c tires with reflective sidewalls
- All commuter essentials included: rack, fenders, lights, kickstand
- MIK-compatible rear rack
- Bluetooth display with simple LED remote
- 300 lb weight limit (rider + cargo + bike)
- Optional Range Extender doubles range
Cons:
- 40Nm torque adequate for city use but less powerful than mid-drive systems
- Range Extender battery is an additional purchase
- Hub motor less efficient on very steep hills than mid-drive
- Assist limited to 20 mph (Class 1/3 restrictions vary by region)
Frame and Suspension Specifications
First, let’s examine the frame details:
- Frame: Alpha Gold Aluminum, internal cable routing, internal battery, rack and mudguard mounts, post mount disc, kickstand mount, 144.5 mm OLD hub motor spacing
- Fork: FX+ alloy, internal brake routing, fender mounts, rack mounts, ThruSkew 5mm bolt-on skewer
- Motor: HyDrive rear hub drive, 250W, 40Nm torque
- Battery: 250Wh integrated lithium-ion
- Controller: Torque sensor, threaded T47, 122.5 mm spindle
Drivetrain Specifications
Next, the drivetrain components include:
- Shifters: Shimano Altus M2010, 9-speed
- Rear Derailleur: Shimano Altus M2000, long cage
- Crankset: ProWheel Pro alloy, 42T narrow-wide steel ring
- Cassette: Shimano HG200, 11-36T, 9-speed
- Chain: KMC E9S, 9-speed
- Pedals: Bontrager City pedals with reflectors
Brake and Wheel Specifications
Moving on to stopping power and rolling stock:
- Brakes: Promax DSK-927 hydraulic disc, 160 mm rotors
- Tires: Bontrager H2 Comp, reflective strip, wire bead, 30 tpi, 700x40c
- Max Tire Size: 700x50c without fenders, 700x45c with fenders
- Wheels: Bontrager Connection, double-wall, 32-hole, 20 mm width
Lighting and Accessories Specifications
Furthermore, the included accessories are:
- Front Light: Herrmans MR4 120-lumen LED
- Rear Light: Spanninga Solo
- Fenders: SKS plastic, full coverage
- Rear Rack: MIK-compatible alloy
- Kickstand: Pletscher Comp 18 alloy
Cockpit and Contact Points
Finally, the rider interface components are:
- Display: Bluetooth with LED remote
- Handlebar: Bontrager alloy, 31.8 mm, 15 mm rise (660mm S/M, 690mm L/XL)
- Stem: Bontrager alloy, 31.8 mm, Blendr compatible, 7-degree (90mm S/M, 100mm L/XL)
- Grips: Bontrager XR Endurance Comp, lock-on
- Saddle: Bontrager Sport
- Seatpost: Bontrager alloy, 31.6 mm, 12 mm offset (330mm S/M, 400mm L/XL)
Weight and Limits
To summarize the physical specifications:
- Weight: 17.69 kg (38.99 lbs) size M
- Weight Limit: 136 kg (300 lbs) total (bike, rider, cargo)
- Top Speed: 20 mph (Class 1/3 depending on region)
- Range: Up to 35 miles (67 km) standard; up to 70 miles with 250Wh Range Extender
Colors
Finally, available color options include:
- Viper Red
- Satin Trek Black
- Satin Mulsanne Blue
Who Is the FX+2 For?
Given these features, the TREK FX+2 Commuter Bicycle is perfect for:
- Daily commuters wanting a lightweight e-bike for urban riding
- Runners and errand-doers needing a practical, ready-to-roll solution
- Riders who prefer a natural, torque-sensor-based pedal-assist feel
- Anyone who wants integrated lights, rack, and fenders without buying separately
- First-time e-bike owners seeking simplicity and quality
Why Choose the FX+2?
In conclusion, the TREK FX+2 Commuter Bicycle occupies the sweet spot in Trek’s electric hybrid lineup. Unlike many e-bikes that require hundreds of dollars of add-ons, the FX+2 comes fully equipped with fenders, lights, a rear rack, and a kickstand—all included . Consequently, you’re ready to ride straight from the box.
Furthermore, the torque sensor is the standout feature. Rather than a basic cadence sensor that delivers power based solely on pedal movement, the FX+2 responds to how hard you pedal . As a result, the ride feels natural and intuitive—perfect for riders transitioning from acoustic bikes or anyone who wants a seamless riding experience.
Moreover, at under 40 lbs, this is Trek’s lightest city e-bike . Therefore, that matters when you’re carrying it up stairs, lifting it onto a car rack, or maneuvering through crowded bike storage. Yet, it doesn’t sacrifice durability—the Alpha Gold Aluminum frame and quality components are built to last.
Finally, for riders who want a lightweight, fully equipped commuter e-bike with natural pedal-assist feel, the TREK FX+2 Commuter Bicycle is a compelling choice.
For more options, browse our Collection of Commuter E-Bikes or read our E-Bike Buying Guide to find your perfect match.
