Torque and cadence sensing adds value by improving assist control and ride feel.
Built-in lights add practical everyday value.
A removable battery adds practical value for charging and storage.
The included display or control unit adds useful everyday value.
Front and rear suspension adds component value, especially for comfort or off-road use.
The bike has 10 or more gears, which adds useful drivetrain range.
The bike appears to be a recent or current model.
The release age is recent, which supports value if pricing is competitive.
93
Very well-equipped for daily use
Built-in lights add useful everyday practicality.
Built-in lights add useful everyday practicality.
The included display or control unit adds useful ride information for daily use.
A removable battery makes daily charging and storage more flexible.
Multiple ride modes should help adapt the bike to different everyday journeys.
Hydraulic disc brakes are useful equipment for confident daily riding.
Payload capacity is average or better, which helps with bags, shopping or daily kit.
90
Excellent removable battery practicality
The removable battery makes charging, storage and battery handling more flexible.
The removable battery makes charging, storage and battery handling more flexible.
This bike type can be larger or heavier, so a removable battery adds useful charging flexibility.
Because the bike is heavier than average, removing the battery can make handling and charging more convenient.
The longer charging time makes it more useful to charge the battery separately from the bike.
89
Excellent trail control
The mountain bike format should feel well suited to trail riding.
The mountain bike format should feel well suited to trail riding.
Front and rear suspension should improve control on uneven trails.
Hydraulic disc brakes should improve control on loose or uneven trails.
The 29-inch wheel size should help rollover and stability on trails.
Torque is strong compared with similar e-bikes, which should help low-speed trail control.
Torque-sensing assistance should help with smoother power control on trails.
Power-to-weight is strong, which should help when controlling the bike over uneven trail sections.
89
Excellent built-in lighting
Built-in lights are included, which is useful for commuting and low-light riding.
Built-in lights are included, which is useful for commuting and low-light riding.
The display or control unit may make light and ride-status management easier.
Battery capacity is average or better for this type of e-bike, supporting everyday powered accessories.
Overview
The Trek Powerfly FS+ 4 is a capable mountain bike designed for trail riding and off-road adventures, offering smooth motor support and confident braking for varied terrain. Its front and rear suspension provide good comfort on rough roads, while the removable battery adds convenience for charging and storage. However, the bike's heavier weight makes it less easy to lift, and its battery efficiency and range are average, which may require more planning for longer rides. Despite these considerations, it delivers strong value for money and solid performance on trails.
Best For
✓
This mountain e-bike should suit riders who prioritize off-road performance, trail control and confident braking on rough terrain. Its strong motor power and torque, combined with front and rear suspension, make it well-suited for trail riding and climbing with good control. The removable battery adds flexibility for charging away from the bike, which is especially useful for riders who travel to remote areas. Riders who value a natural power response and comfort on uneven surfaces will likely appreciate its design and capabilities.
Who Should Avoid It
×
Riders who frequently tackle long off-road rides may want to compare alternatives, as the range is below average for similar mountain e-bikes and charging time is longer than average for this type of e-bike. Riders who prioritize fast charging or extended range for multi-day adventures could find stronger options in the same category. However, the bike still offers excellent off-road capability and braking confidence, which may suit riders focused on trail performance over range and charging convenience.
Ownership considerations
These points highlight practical ownership factors such as maintenance, storage, charging, everyday
handling and bad-weather usability.
36
Some maintenance considerations
Weak
Chain drive is common and serviceable, but needs more cleaning and lubrication than a belt drive.
Chain drive is common and serviceable, but needs more cleaning and lubrication than a belt drive.
Hydraulic disc brakes are a strong everyday setup, though they may need occasional specialist servicing.
A removable battery makes charging, storage and battery care easier.
Tyres are listed, but there is no clear puncture-protection signal.
The aluminium frame material is practical for everyday use and general maintenance.
Built-in lights reduce the need to manage separate lighting accessories.
The mountain bike format may involve more wear from rougher riding and more complex components.
A higher number of gears can add drivetrain complexity.
Front and rear suspension can add maintenance complexity.
0
Limited storage practicality
Poor
The frame does not appear to fold, so storage will depend more on size and weight.
The frame does not appear to fold, so storage will depend more on size and weight.
The bike is heavier than average for its type, which may make storage and moving it harder.
The removable battery can make storage and indoor charging more flexible.
A full-suspension mountain bike format is usually bulkier and harder to store indoors.
15
Harder to lift
Poor
The bike is heavier than average for its type, so it may not be especially easy to lift.
The bike is heavier than average for its type, so it may not be especially easy to lift.
The listed weight is 26.5 kg.
The aluminium frame material is a practical lightweight choice for many e-bikes.
The removable battery can reduce the weight when lifting or moving the bike.
The mountain bike format can be bulkier and harder to lift than simpler urban e-bikes.
The 29-inch wheel size can make the bike more awkward to lift or store.
90
Excellent removable battery practicality
Excellent
The removable battery makes charging, storage and battery handling more flexible.
The removable battery makes charging, storage and battery handling more flexible.
This bike type can be larger or heavier, so a removable battery adds useful charging flexibility.
Because the bike is heavier than average, removing the battery can make handling and charging more convenient.
The longer charging time makes it more useful to charge the battery separately from the bike.
0
Very slow charging speed
Poor
Charging time is longer than average for this type of e-bike.
Charging time is longer than average for this type of e-bike.
The quoted charging time is long in absolute terms.
29
Low battery efficiency
Poor
Battery efficiency appears average for this type of e-bike.
Battery efficiency appears average for this type of e-bike.
The calculated range per battery unit is 91.67.
93
Very well-equipped for daily use
Excellent
Built-in lights add useful everyday practicality.
Built-in lights add useful everyday practicality.
The included display or control unit adds useful ride information for daily use.
A removable battery makes daily charging and storage more flexible.
Multiple ride modes should help adapt the bike to different everyday journeys.
Hydraulic disc brakes are useful equipment for confident daily riding.
Payload capacity is average or better, which helps with bags, shopping or daily kit.
75
Good bad-weather practicality
Good
Hydraulic disc brakes should provide better control and confidence in wet conditions.
Hydraulic disc brakes should provide better control and confidence in wet conditions.
Built-in lights are useful for rain, low light and darker commutes.
The mountain bike format should offer useful control on rough or slippery surfaces.
Suspension can help control and comfort on rough, wet or uneven surfaces.
The bike weight may help it feel more planted in wet or windy conditions.
The wheel size should be workable for regular poor-weather riding, depending on tyre choice.
Frame material is listed as aluminium, which gives useful durability and maintenance context.
35
Some family utility limitations
Weak
Payload capacity is average for this type of e-bike.
Payload capacity is average for this type of e-bike.
The listed maximum payload is practical for lighter utility use.
The listed maximum payload is 136 kg.
Hydraulic disc brakes are useful when carrying children, shopping or heavier loads.
Built-in lights are useful for school runs, errands and daily utility riding.
A removable battery makes charging easier around family or utility use.
Where to buy
Priced at £4,250, the Trek Powerfly FS+ 4 Equipped Gen 4 looks favourably positioned against similar 2026 mountain bikes, offering a strong balance of performance and features. Its value is supported by its spec and build quality, though buyers may want to weigh this against alternatives in the same category.
Compared with similar mountain bike e-bikes on Bikkerr, this model sits £1,408.07 below average
Lowest price now: £3,150.00Best price ever seen:
£3,150.00Price drop detectedPrices update every ~24 hours
Priced at £4250, the Trek Powerfly FS+ 4 Equipped Gen 4 sits comfortably within the expected range for a 2026 mountain e-bike, offering a strong balance of performance and features. It stands out with its robust torque support and power-to-weight ratio, which are both well-suited for off-road riding, and the inclusion of hydraulic disc brakes and front and rear suspension adds to its appeal on rougher terrain. However, some similar e-bikes in the same category may offer a longer range, which could be a consideration for riders planning extended trail sessions. For a mountain e-bike focused on trail comfort, control and strong motor support, this model presents a compelling case, especially for those prioritising immediate responsiveness and suspension over maximum range. Riders who value a well-rounded package with confident braking and smooth assistance on varied terrain are likely to see the value in this bike's offering.
We reach this value score by combining the bike’s price, specification, performance data and comparison against similar e-bikes in our database.
93
The price/value label suggests this bike offers good value.
The listed price is GBP 4,250.
The bike appears to save around GBP 413 versus the average.
Motor power is strong compared with similar e-bikes.
Same power7 miles more range200 Wh more battery2 kg heavierSame gears
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Potential limitations
Areas where this e-bike may be less strong based on its specs and comparisons.
0
Limited commuting practicality
The mountain bike format is less commuting-focused and may be less efficient for daily urban use.
The mountain bike format is less commuting-focused and may be less efficient for daily urban use.
Range is below average, but may still be usable for shorter commutes.
Charging time is longer than average, which may be less convenient for daily use.
Built-in lights are useful for commuting and low-light riding.
A removable battery makes home, office or indoor charging easier.
The display or control unit should make it easier to monitor assist level and battery use.
Hydraulic disc brakes are a strong practical feature for daily riding.
Payload capacity is average for this type of e-bike.
The bike is heavier than average for its type, which may make daily handling less convenient.
Front and rear suspension can add weight and complexity for normal commuting.
0
Limited storage practicality
The frame does not appear to fold, so storage will depend more on size and weight.
The frame does not appear to fold, so storage will depend more on size and weight.
The bike is heavier than average for its type, which may make storage and moving it harder.
The removable battery can make storage and indoor charging more flexible.
A full-suspension mountain bike format is usually bulkier and harder to store indoors.
0
Very slow charging speed
Charging time is longer than average for this type of e-bike.
Charging time is longer than average for this type of e-bike.
The quoted charging time is long in absolute terms.
15
Harder to lift
The bike is heavier than average for its type, so it may not be especially easy to lift.
The bike is heavier than average for its type, so it may not be especially easy to lift.
The listed weight is 26.5 kg.
The aluminium frame material is a practical lightweight choice for many e-bikes.
The removable battery can reduce the weight when lifting or moving the bike.
The mountain bike format can be bulkier and harder to lift than simpler urban e-bikes.
The 29-inch wheel size can make the bike more awkward to lift or store.
24
Poor range-to-weight balance
Range is below average, so the range-to-weight balance is more limited.
Range is below average, so the range-to-weight balance is more limited.
The bike is heavier than average, which limits range-to-weight balance.
Battery efficiency appears broadly average.
The calculated range per kg is 2.08.
The calculated range per battery unit is 91.67.
29
Low battery efficiency
Battery efficiency appears average for this type of e-bike.
Battery efficiency appears average for this type of e-bike.
The calculated range per battery unit is 91.67.
34
Some longer-ride limitations
Range is below average compared with similar e-bikes, so longer rides may need more planning.
Range is below average compared with similar e-bikes, so longer rides may need more planning.
Battery capacity is average for this type of e-bike.
Battery efficiency appears broadly average.
The removable battery can make charging easier during longer days or multi-stop rides.
Charging time is longer than average, which may be less convenient for back-to-back longer rides.
The display or control unit should make it easier to monitor assistance and battery use on longer rides.
35
Limited battery capacity
Battery capacity is average for this type of e-bike.
Battery capacity is average for this type of e-bike.
The listed battery capacity should be practical for regular riding.
E-system & battery comparison
Motor Power
600 watts
▲ 160 W above average
Motor Torque
85 Nm
▲ 6.5 Nm above average
Power-to-weight
22.64 W/kg
▲ 2.3 W/kg above average
Battery Capacity
600 Wh
▼ 31 Wh below average
Claimed Max Range
55 miles
▼ 5.5 miles below average
Charge Time
6h
▲ 45 mins slower than average
Sensor Type
Torque and Cadence Sensor
Removable Battery
Yes
Motor Name
Bosch Performance Line CX (Smart System)
This mountain e-bike offers a strong and responsive motor setup that should feel capable and lively on trails, with good support for climbing and low-speed control. Against similar e-bikes, the motor's power and torque should deliver a more dynamic riding experience, especially when tackling rough terrain or steep inclines. The torque and cadence sensor should provide a smooth and natural assistance feel, helping riders maintain control and responsiveness across varied trail conditions. The motor's power-to-weight balance should make the assistance feel more lively and engaging, though riders should be mindful that the range may be more limited than on some similar models, which could affect longer rides. This motor setup is likely to suit riders looking for a capable and responsive mountain e-bike that can handle technical trails with confidence.
This explanation is based on the bike’s motor power, torque, battery capacity, claimed range, charging
time, sensor type and how those figures compare with similar e-bikes in our database.
eBike FAQs
Is this bike suitable for long off-road rides?
This mountain bike is well-suited for off-road trails, with hydraulic disc brakes providing confident stopping power and front and rear suspension offering good comfort on rough terrain. However, its average range of 55 miles may require careful planning for longer rides, and the above-average weight of 26.5 kg could make it less convenient to carry or lift when needed.
How does the motor perform when climbing steep trails?
The motor should provide strong support when climbing steep trails, thanks to its 600W power and 85Nm of torque, which should help with acceleration and maintaining momentum on inclines. While the motor is powerful for its category, the bike's average battery efficiency and below-average range of 55 miles may require careful planning for longer climbs or multiple ascents. The hydraulic disc brakes should also contribute to confident control, making the bike a solid choice for challenging trail riding.
Does the bike handle rough terrain comfortably with its suspension?
The Trek Powerfly FS+ 4 is built for rough terrain, with front and rear suspension that should significantly improve comfort on uneven trails and rough roads. This setup helps absorb shocks and maintain control, making it a solid choice for trail riding. However, the bike's weight may affect how easily it can be maneuvered in tight or technical sections, so riders should consider this when planning their route.
How practical is the removable battery for everyday use?
The removable battery is quite practical for everyday use, as it allows you to charge the battery separately from the bike, which can be convenient if you're at home or a charging station. This feature also makes it easier to store the battery when not in use or transport it if needed. However, since the battery capacity is average for this type of e-bike, you may need to plan your rides carefully to ensure you have enough charge for your intended route.
Is the battery range enough for typical mountain biking trips?
The Trek Powerfly FS+ 4 offers a range of around 55 miles on a single charge, which should be sufficient for most typical mountain biking trips, especially if you're not pushing the bike to its limits. However, if you're planning longer rides or riding in more demanding conditions, you may need to plan for additional charging stops. The battery is removable, which makes it easier to charge when needed, but the average battery efficiency means you might not get the longest range compared to some competitors.
How does the bike's weight affect its portability and handling?
The Trek Powerfly FS+ 4 weighs 26.5 kg, which is above average for a mountain e-bike. This makes it somewhat heavier to lift, carry or maneuver when dismounted, which could be a consideration for trailside storage or transport. However, the weight is balanced by the bike's robust frame and suspension, which contribute to stable handling on rough terrain. While it may feel less nimble compared to lighter models, the weight supports the bike's performance on challenging trails and with its powerful motor.
Is this bike good value for money compared to similar e-bikes?
The Trek Powerfly FS+ 4 offers strong value for money when compared to similar mountain e-bikes, especially considering its powerful motor, confident braking, and excellent off-road capability. While its range and charging time are average, the removable battery adds convenience for everyday use, and the bike's suspension ensures comfort on rough terrain. These features make it a solid choice for serious trail riders who prioritize performance over extended range or fast charging.
What are the main limitations of this bike for serious off-road use?
This bike is well-suited for off-road trails, but its heavier weight of 26.5 kg may make it more challenging to lift or carry when needed. The battery range of 55 miles is below average for mountain e-bikes, which could require more frequent charging on longer rides. While the motor provides strong support and the brakes are confident, the average battery efficiency and slower charging time may limit its practicality for extended or remote off-road adventures.
eBike Overview
eBike Type: Mountain Bike
The style of riding intended for this bike
Released:
2026
The bike was released this year
Screen
Bosch Purion 200
Lights Included
Yes
Weight (inc battery): 26.5 kg
The website average for electric bikes is
22.99 kg.
This electric bike is 3.50 kg over the average. Total bike weight may vary depending on frame size.
Sizing & Geometry
Min / Max Rider Height
XS | S 155–165 cm (5′1″–5′5″) | M 165–176 cm (5′5″–5′9″) | L 177–188 cm (5′10″–6′2″) | XL 188–195 cm (6′2″–6′5″)
Adjustable Sizing
Adjustable saddle height
Folded Dimensions
n/a
Wheel & Tire Details
Wheelset Name
Bontrager Line TLR 30 rims with 2.40" Bontrager Gunnison Pro XR tires
10-speed Shimano CUES U 6000 with Linkglide technology
Amount of gears
12 Gears
Cassette
11-48 T
Cranks
36 T crankset
Chain
10-speed Shimano CUES U 6000 with Linkglide technology
Brakes
Brakes
Tektro Gemini SL 4-piston hydraulic disc brakes with Tektro 203 mm rotors
Brake Type: Hydraulic Disc Brake
Hydraulic operated discs brakes (Very good)
Brake Rotors
4-piston Tektro Gemini SL hydraulic
Shifters
10-speed Shimano CUES U 6000 with Linkglide technology
Other Components
Saddle
Unknown
Handlebars
Unknown
Bar Tape
Unknown
Manufactures Info
Worldwide Shipping:
Yes
Delivery across the globe!
Warranty:
2 Years
Limited warranty website average:
3.12 years
The Powerfly FS+ 4 Equipped Gen 4 from TREK is a premium electric mountain bike, designed to enable you to tackle both city streets and rugged mountain trails with equal aplomb. Fitted with a powerful Bosch Performance Line CX motor and a removable Integrated Battery 2.0 (RIB 2.0), this e-bike offers full-suspension and a whole suite of features aimed at enhancing your riding experience. Whether you are an adventurer at heart or just looking for ... Read More
The Powerfly FS+ 4 Equipped Gen 4 from TREK is a premium electric mountain bike, designed to enable you to tackle both city streets and rugged mountain trails with equal aplomb. Fitted with a powerful Bosch Performance Line CX motor and a removable Integrated Battery 2.0 (RIB 2.0), this e-bike offers full-suspension and a whole suite of features aimed at enhancing your riding experience. Whether you are an adventurer at heart or just looking for a comfortable and electrically-assisted ride around town, this e-bike is built for you. Its 130 mm front and 120 mm rear suspensions easily smoothen out rough surfaces while providing an excellent on-the-saddle comfort during your single-track escapades. Furthermore, it boasts a sturdy and durable Alpha Platinum Aluminium frame, tubeless-ready wheels with puncture-resistant 2.4" tyres, and a 10-speed Shimano CUES drivetrain. The hydraulic disc brakes ensure an uncompromising stopping power while the Bontrager Line dropper post adds an extra layer of comfort and control to your ride. What sets the Powerfly FS+ 4 Equipped Gen 4 apart is a range of integrated features such as lights, mudguards, a rear rack and a kickstand. These additions make it a ready-for-adventure e-bike, be it a weekend exploration of alpine trails or a daily commute in the city. Also noteworthy is that the bike is compatible with the Bosch eBike Flow app. This next-gen app lets you customise your motor's assist behaviour, track ride stats, integrate data with other apps and remind you of regular bike service — enhancing your e-biking experience like never before. In summary, the Powerfly FS+ 4 Equipped Gen 4 from TREK is your ticket to limitless, exhilarating adventures. With its full-suspension engineering, powerful motor and a removable battery, it boldly takes you where few e-bikes have been before.
