Highlights based on this e-bike’s specs, comparisons and practical strengths.
100
Excellent downhill control
Front and rear suspension should improve control and confidence on descents.
Front and rear suspension should improve control and confidence on descents.
Hydraulic disc brakes should provide controlled braking on descents.
The 29-inch or mullet wheel setup should help stability and control on descents.
The mountain bike design should be better suited to controlled descending.
100
Excellent off-road capability
The mountain bike design should be well suited to off-road riding.
The mountain bike design should be well suited to off-road riding.
Front and rear suspension should improve control and comfort off-road.
Hydraulic disc brakes should help with control on loose or uneven terrain.
Torque is strong compared with similar e-bikes, which should help on loose or uneven climbs.
The 29-inch wheel size should help rollover and stability on rougher terrain.
100
Excellent braking confidence
Hydraulic disc brakes should provide strong and controlled stopping power.
Hydraulic disc brakes should provide strong and controlled stopping power.
The brake specification mentions four-piston brakes, which should improve stopping power and control.
The brake specification appears to include larger rotors, which can help braking power and heat management.
100
Excellent technical trail control
The mountain bike design is well suited to technical trail control.
The mountain bike design is well suited to technical trail control.
Front and rear suspension should significantly improve control on technical trails.
Hydraulic disc brakes should provide the control needed for technical trail riding.
The brake specification mentions four-piston brakes, which should improve control on steeper or rougher trails.
The brake specification appears to include larger rotors, which can help braking power and heat management.
The 29-inch wheel size should help rollover and stability on technical terrain.
Torque is above average for this type of e-bike.
Torque-sensing assistance should help with smoother control on technical sections.
The bike is heavier than average for its type, which may affect technical handling.
Power-to-weight is strong, which should help with technical sections that need quick support.
Multiple ride modes should help the rider manage assistance on technical trails.
100
Excellent battery capacity
Battery capacity is high compared with similar e-bikes.
Battery capacity is high compared with similar e-bikes.
The listed battery capacity is large in absolute terms.
97
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 larger battery capacity makes removable charging more useful for day-to-day convenience.
The longer charging time makes it more useful to charge the battery separately from the bike.
94
Excellent rider information and controls
The included display or control unit should give useful ride information and control.
The included display or control unit should give useful ride information and control.
Multiple ride modes should give the rider more control over assistance levels.
Torque and cadence sensing should improve how precisely the bike responds to rider input.
With stronger motor output, clear controls and ride modes become more useful.
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 23.92.
Overview
The Trek Powerfly FS+ 6 Gen 4 is a capable mountain bike designed for off-road trails, offering strong motor support and confident braking for varied terrain. Its high torque and cadence sensor ensure smooth assistance, while the front and rear suspension provide good comfort on rough roads. The removable battery adds convenience for charging and storage, though the charging time is notably slow, and the bike's weight makes it less easy to lift. While the battery capacity is impressive, the range is somewhat limited for longer rides, requiring careful planning for extended use.
Best For
✓
This mountain e-bike should suit riders who prioritize off-road performance, confident braking, and a strong battery setup for extended trail rides. Its high battery capacity and robust motor power make it a solid choice for trail riders looking for reliable hill support and responsive assistance on rough terrain. The front and rear suspension also provide good comfort on uneven surfaces, making it a practical option for those who frequently ride on mixed or rough trails. Riders who value the flexibility of a removable battery for charging away from the bike may also find this feature particularly useful.
Who Should Avoid It
×
Riders who prioritise extended single-charge range may want to compare alternatives, as the 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 drawback for riders who need to recharge quickly. However, the bike still offers strong battery capacity and excellent off-road capability, making it a solid choice for riders focused on trail performance and confident braking.
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 25.08 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.
The larger-than-average battery capacity may add weight.
97
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 larger battery capacity makes removable charging more useful for day-to-day convenience.
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 68.75.
Range is weak despite a larger battery, which suggests lower battery efficiency.
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.
34
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.
A removable battery makes charging easier around family or utility use.
Battery capacity is strong compared with similar e-bikes, supporting utility trips.
Where to buy
Priced at £5,000, the Trek Powerfly FS+ 6 Gen 4 looks favourably positioned against similar mountain bikes from 2026, offering strong value with its performance features. However, it may be considered demanding in a broader context due to its higher price point relative to some other options.
Compared with similar mountain bike e-bikes on Bikkerr, this model sits £658.07 below average
Lowest price now: £4,500.00Best price ever seen:
£4,500.00Price drop detectedPrices update every ~24 hours
The Trek Powerfly FS+ 6 Gen 4 is listed at £5,000, which sits comfortably against similar mountain e-bikes from the same year, offering a price that feels reasonable for the features included. It compares well with rivals in terms of battery capacity, torque support and power-to-weight ratio, which are all strong for a mountain e-bike, and the hydraulic disc brakes add confidence on technical trails. However, some similar models may offer a longer range, which could be important for riders planning extended off-road rides. For this type of bike, the balance of motor support, suspension and braking makes it a solid option for trail-focused riders who prioritise control and performance over maximum range. Buyers who value strong hill support and responsive handling on rough terrain are likely to see the value in this package, especially given the competitive pricing when compared to other mountain e-bikes from 2026.
We reach this value score by combining the bike’s price, specification, performance data and comparison against similar e-bikes in our database.
62
The listed price is GBP 5,000.
Battery capacity is strong compared with similar e-bikes.
Motor power is strong compared with similar e-bikes.
Same power7 miles more rangeSame battery3 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 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 25.08 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.
The larger-than-average battery capacity may add weight.
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.
Range is limited despite a larger battery, which weakens the efficiency picture.
The calculated range per kg is 2.19.
The calculated range per battery unit is 68.75.
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 68.75.
Range is weak despite a larger battery, which suggests lower battery efficiency.
30
Some maintenance considerations
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.
E-system & battery comparison
Motor Power
600 watts
▲ 160 W above average
Motor Torque
85 Nm
▲ 6.5 Nm above average
Power-to-weight
23.92 W/kg
▲ 3.6 W/kg above average
Battery Capacity
800 Wh
▲ 169 Wh above 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/Gen 5)
This mountain e-bike offers a strong and responsive motor setup that should feel well-suited for trail riding, with good support on climbs and rough terrain. Next to similar models, the motor's power and torque should deliver a more lively and natural assistance feel, especially when climbing or navigating technical trails. The torque and cadence sensor should help maintain smooth and predictable power delivery, allowing for better control in varied conditions. The motor's power-to-weight balance should make the assistance feel more responsive, though riders may notice the range is somewhat limited compared to some similar e-bikes, which could affect longer rides. This motor setup is likely to suit riders looking for strong, trail-focused assistance with good control and responsiveness on technical terrain.
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 for comfort on rough terrain. However, the range is below average at 55 miles, so longer rides may require careful planning and additional battery management.
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 range is below average at 55 miles, so riders may need to plan for more frequent charging on longer or more challenging climbs. The high motor power should make steep trails more manageable, but battery efficiency and charging time could be factors for extended off-road use.
Does the bike handle rough terrain comfortably with its suspension?
The Trek Powerfly FS+ 6 Gen 4 is built for rough terrain, with front and rear suspension that should help absorb shocks and improve comfort on uneven trails. While the suspension is designed for off-road use, the bike's weight and average battery efficiency may affect how long you can ride comfortably on rough terrain before needing to recharge.
How practical is the removable battery for charging and storage?
The removable battery on the Trek Powerfly FS+ 6 Gen 4 is quite practical for charging and storage, as it allows you to take the battery indoors to charge it safely or store it separately when not in use. This can be especially useful if you're riding in wet or muddy conditions, as it helps keep the bike dry and the battery protected. However, the charging time is above average, so you may need to plan ahead for longer charging sessions.
Is the battery capacity enough for a full day of mountain biking?
The battery capacity of 800 watt-hours is quite strong for a mountain e-bike, but the range of 55 miles may not be enough for a full day of continuous off-road riding, especially on challenging trails. You may need to plan for mid-ride charging or carry a spare battery if you're planning extended use. The battery's high capacity helps, but efficiency and terrain will impact how far you can go on a single charge.
How does the bike's weight affect its portability and handling?
The Trek Powerfly FS+ 6 Gen 4 weighs 25.08 kg, which is above average for a mountain e-bike. This makes it somewhat heavier to carry, especially when lifting or moving the bike manually, which could be a consideration for trail access or storage. However, the weight is balanced by the bike's robust frame and suspension, which contribute to stable handling on rough terrain. While it may not be the lightest option, the weight supports the bike's performance and durability for off-road use.
Is this bike good value for its performance and features?
The Trek Powerfly FS+ 6 Gen 4 offers a strong set of features for mountain biking, including a powerful motor, high torque, and confident braking, which make it well-suited for off-road trails. However, the bike's price of GBP 5,000 may be a consideration, especially given its average range and slower charging time. While it delivers solid performance for its category, buyers should weigh these factors against their specific needs and budget to determine if it represents good value for them.
What are the main limitations or trade-offs of this e-bike?
The Trek Powerfly FS+ 6 Gen 4 has a few trade-offs to consider. While it offers strong motor support and a high-capacity battery, the range is below average, so longer rides may require careful planning or additional charging. The bike is also heavier than most mountain e-bikes, which can make it harder to lift or carry, especially when disassembling for storage. Additionally, the charging time is slower than average, which could be a drawback if you need to recharge quickly after a ride.
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): 25.08 kg
The website average for electric bikes is
22.99 kg.
This electric bike is 2.08 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″)
Shimano M6100 lever with M6120 4-piston hydraulic disc calipers and Shimano RT64 203 mm rotors
Brake Type: Hydraulic Disc Brake
Hydraulic operated discs brakes (Very good)
Brake Rotors
203 mm rotors front and rear
Shifters
Shimano SLX M 7100, 12-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
Take on even the roughest terrains and embarking on off-road adventures with the 2025 Powerfly FS+ 6 Gen 4 by TREK. This full-suspension electric mountain bike is a gamechanger in outdoor exploration. Touting 130mm of trail-softening travel at the front and 120mm at the rear, it guarantees smooth rides no matter how bumpy the terrain. Designed to level up your outdoor journey, this e-MTB is powered by a Bosch Performance Line CX motor and a Remov ... Read More
Take on even the roughest terrains and embarking on off-road adventures with the 2025 Powerfly FS+ 6 Gen 4 by TREK. This full-suspension electric mountain bike is a gamechanger in outdoor exploration. Touting 130mm of trail-softening travel at the front and 120mm at the rear, it guarantees smooth rides no matter how bumpy the terrain. Designed to level up your outdoor journey, this e-MTB is powered by a Bosch Performance Line CX motor and a Removable Integrated Battery 2.0 (RIB 2.0) – all developed to boost your far-reaching expeditions. Packed with the category-leading features, the Powerfly FS+ 6 Gen 4 is handsomely equipped with tubeless-ready wheels and 2.4" puncture-resistant tyres. Its 12-speed Shimano SLX drivetrain ensures clean and flawless gear shifts, while the Bontrager Line dropper post and hydraulic disc brakes offer a strategically balanced ride. It's not all about rugged performance, the Powerfly FS+ 6 Gen 4 also takes rider comfort into mind. Its Alpha Platinum Aluminium frame gives the bike sturdiness while keeping it lightweight, and the FOX Float Rhythm shock provides an agreeable amount of shock absorption. Additionally, the strong Bosch Performance Line CX motor delivers a proficient torque perfect for steep rides, and the eBike Flow app enables riders to customise their motor's assist behaviour. With the Powerfly FS+ 6 Gen 4's RIB 2.0 removable integrated battery, cyclist can explore with less worry. Plus, it's compatible with Bosch PowerMore booster batteries, making long journeys from dawn to dusk legitimately possible. Whenever you need to remove the battery for travel or storage, it's a hassle-free process. The journey doesn't stop when the sun goes down - with mounts for bags, lights, and racks, you're ready for an all-terrain, all-weather adventure.For a personal touch, the eBike Flow app by Bosch is an excellent feature to track your ride stats, customise your ride experience and integrate your data with fitness apps such as Strava or Apple Health. Service reminders and the navigation features could come handy in a pinch.Move beyond the beaten track. Reach for new summits. Embrace the spirit of adventure with the 2025 Powerfly FS+ 6 Gen 4 Electric Mountain Bike by TREK.
