Torque and cadence sensing adds value by improving assist control and ride feel.
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.
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.
83
Good rough-road comfort
Front and rear suspension should significantly improve comfort on rough roads and uneven surfaces.
Front and rear suspension should significantly improve comfort on rough roads and uneven surfaces.
The larger wheel size should help roll over bumps and rough surfaces more smoothly.
The mountain bike format is generally better suited to rougher terrain.
Hydraulic disc brakes add useful control on rougher routes.
The bike weight may help it feel more planted over rough surfaces.
Frame material is listed as aluminium, which gives useful comfort and build context.
82
Good hill climbing support
Torque is above average for this type of e-bike.
Torque is above average for this type of e-bike.
Power-to-weight is above average.
Motor power is high compared with similar e-bikes.
The torque-sensing assistance should help the bike respond more naturally on climbs.
The bike has 10 or more gears, which should help on varied climbs.
The bike is heavier than average for its type.
The calculated power-to-weight score is 24.41.
Overview
The Trek Powerfly FS+ 4 Gen 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 charging time is notably slow, and its battery efficiency means you may need to plan more carefully for longer rides. Weighing in at over 24 kg, it's not the easiest to lift, but its strong motor and hydraulic brakes make it a solid choice for serious trail riders.
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 hill climbing. 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 feature set.
Who Should Avoid It
×
Riders who prioritise extended range on single charges may want to compare alternatives, as this bike's range is below average for similar mountain e-bikes. The charging time is also longer than average for this type of e-bike, which could be a consideration for riders who need to recharge quickly. However, the bike still offers strong off-road capability and confident braking, making it a solid choice for riders focused on trail performance and control.
Ownership considerations
These points highlight practical ownership factors such as maintenance, storage, charging, everyday
handling and bad-weather usability.
30
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.
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 24.58 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.
69
Decent everyday equipment
Mixed
The included display or control unit adds useful ride information for daily use.
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.
53
Mixed bad-weather practicality
Mixed
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 not listed, so bad-weather visibility may depend on extra accessories.
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.
28
Limited family utility practicality
Poor
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.
A removable battery makes charging easier around family or utility use.
Where to buy
Priced at £4,000, the Trek Powerfly FS+ 4 Gen 4 looks favourably positioned against similar mountain bikes from 2026, offering strong component spec and performance for the price. The main trade-off may be a slightly heavier frame compared to some competitors.
Compared with similar mountain bike e-bikes on Bikkerr, this model sits £1,658.07 below average
Lowest price now: £3,150.00Best price ever seen:
£3,150.00Price drop detectedPrices update every ~24 hours
The Trek Powerfly FS+ 4 Gen 4 is listed at £4,000, which sits comfortably against similar mountain e-bikes from the same year, offering a strong value case for its category. It stands out with its robust torque support and a power-to-weight ratio that feels well balanced for off-road use, while the hydraulic disc brakes and dual suspension provide confidence and control on rough terrain. However, some similar e-bikes may offer a longer range, which could be a consideration for riders planning extended trail sessions. For a mountain e-bike focused on trail performance and comfort, the package feels cohesive, with the motor and suspension working well together for the intended use. Riders prioritising strong hill support, responsive braking and a smooth ride on varied terrain are likely to see the value in this bike. If range is a key priority, buyers may want to compare alternatives that offer more miles per charge.
We reach this value score by combining the bike’s price, specification, performance data and comparison against similar e-bikes in our database.
89
The price/value label suggests this bike offers good value.
The listed price is GBP 4,000.
The bike appears to save around GBP 663 versus the average.
Motor power is strong compared with similar e-bikes.
Same power20 miles more rangeSame battery1 kg heavier1 more 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 not listed, so commuting equipment may need adding.
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.
11
No built-in light advantage
Built-in lights are not listed, so separate lights may be needed.
Built-in lights are not listed, so separate lights may be needed.
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.
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 24.58 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 2.24.
The calculated range per battery unit is 91.67.
28
Limited family utility practicality
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.
A removable battery makes charging easier around family or utility use.
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.
E-system & battery comparison
Motor Power
600 watts
▲ 160 W above average
Motor Torque
85 Nm
▲ 6.5 Nm above average
Power-to-weight
24.41 W/kg
▲ 4.0 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
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. Next to similar models, the motor's power and torque should provide a noticeable edge in terms of assistance on technical terrain and steep inclines. The torque and cadence sensor should help deliver smooth and natural power delivery, making the assistance feel more intuitive and predictable during rides. The motor's power-to-weight balance should enhance responsiveness, especially when navigating rough or uneven ground. Riders looking for a motor that feels confident and supportive on challenging trails, without sacrificing control, should find this setup well-suited to their needs.
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 bike is well-suited for off-road trails, thanks to its mountain bike design, hydraulic disc brakes, and front and rear suspension, which provide good comfort and control on rough terrain. However, its below-average range of 55 miles may require careful planning for longer rides, and the bike's above-average weight of 24.58 kg could make it harder to lift or carry 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. However, the bike's average battery efficiency and below-average range of 55 miles may require careful planning for longer or more intense climbs. The hydraulic disc brakes should also offer confident stopping power, which is important when navigating steep or technical terrain.
Does the bike handle rough terrain comfortably?
The Trek Powerfly FS+ 4 Gen 4 handles rough terrain comfortably, thanks to its front and rear suspension, which should significantly improve comfort on uneven surfaces. Hydraulic disc brakes provide confident stopping power, making it a solid choice for trail riding. However, the bike's weight and average battery efficiency may require some planning for longer rides.
How practical is the removable battery for daily use?
The removable battery is quite practical for daily use, especially if you need to charge it separately from the bike or store it in a different location. This feature makes it easier to manage charging schedules and can be convenient for travel or storage. 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 regular trail riding?
The Trek Powerfly FS+ 4 Gen 4 offers a range of around 55 miles on a single charge, which should be sufficient for most regular trail rides, especially if you're not pushing the motor to its limits. However, since the battery efficiency is average and the range is below average for this type of e-bike, you may need to plan for more frequent charging if you're riding longer distances or in hilly terrain. The removable battery adds convenience for charging, but the slower charging time could be a consideration for daily use.
How does the bike's weight affect its portability and handling?
The Trek Powerfly FS+ 4 Gen 4 weighs 24.58 kg, which is above average for a mountain e-bike. This makes it somewhat heavier to carry, especially when lifting it onto a vehicle or carrying it over obstacles. However, the weight is balanced well for trail riding, providing stability and control on rough terrain. While it may feel less portable compared to lighter models, the bike's strong motor and suspension help maintain handling confidence on challenging trails.
Is this bike good value for the features it offers?
The Trek Powerfly FS+ 4 Gen 4 offers a solid mix of performance and features for a mountain e-bike, especially with its strong motor, hydraulic brakes, and removable battery. While the price is on the higher side, the bike’s capabilities for trail riding and off-road use justify the cost for serious riders. However, the slower charging time and average battery efficiency may require more planning for longer rides, which could affect its overall value depending on your needs.
What are the main limitations of this e-bike for serious off-road use?
While the Trek Powerfly FS+ 4 Gen 4 is built for off-road use, it has a few limitations that serious riders should consider. The bike's range of 55 miles is below average for mountain e-bikes, so longer rides may require careful planning or additional batteries. Its weight of 24.58 kg makes it harder to lift and carry, which could be a drawback if you frequently need to transport the bike. Additionally, the charging time is slower than average, which might be inconvenient if you're riding multiple days in a row. These factors may limit its suitability for extended or high-intensity 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
No
Weight (inc battery): 24.58 kg
The website average for electric bikes is
22.99 kg.
This electric bike is 1.58 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″)
Tektro Gemini SL 4-piston hydraulic disc brakes with Tektro CentreLock 203 mm rotors
Brake Type: Hydraulic Disc Brake
Hydraulic operated discs brakes (Very good)
Brake Rotors
Tektro Gemini SL 4-piston hydraulic disc brakes
Shifters
Shimano U 6000, 10-speed
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 pioneering TREK Powerfly FS+ 4 Gen 4 is your ticket to thrilling off-the-beaten-path adventures. This full-power, full-suspension e-MTB is equipped with both front and rear trail-soothing travel mechanisms – 130 mm and 120 mm respectively – offering effortless handling over rough terrains. The high-performance Bosch Performance Line CX motor, bolstered by an innovative Removable Integrated Battery 2.0 (RIB 2.0) that's PowerMore compatible ... Read More
The pioneering TREK Powerfly FS+ 4 Gen 4 is your ticket to thrilling off-the-beaten-path adventures. This full-power, full-suspension e-MTB is equipped with both front and rear trail-soothing travel mechanisms – 130 mm and 120 mm respectively – offering effortless handling over rough terrains. The high-performance Bosch Performance Line CX motor, bolstered by an innovative Removable Integrated Battery 2.0 (RIB 2.0) that's PowerMore compatible, ensures ultimate power and prolonged rides for ambitious escapades. Be it exploration on rugged trails or recreational rides around the city, this seamless full-suspension bike, coupled with the robust Shimano CUES drivetrain, guarantees crisp shifts, irrespective of the riding conditions. Highly resistant 2.4" tyres, tubeless-ready wheels, and dependable hydraulic disc brakes make for reliable biking experience. A special mention goes to the Bontrager Line dropper post, which adds to the comfort and control during your thrilling downhill rides. Couple these incredible features with the long-life 600 Wh PowerTube RIB 2.0 removable integrated battery, easy-to-operate Purion 200 controller, and powerful 85 Nm, 250 W motor, and you have an e-MTB that's set to redefine your biking norms. Heighten your riding experience further by personalising motor behaviour, monitoring ride stats, integrating data with apps like Strava and Apple Health, and setting up service reminders through the Bosch eBike Flow app. The TREK Powerfly FS+ 4 Gen 4 – your solution to exploring untrodden trails confidently and comfortably, with its torque-rich motor and monstrously capable battery. Unleash the explorer in you and embark on unforgettable adventures.
