Torque-sensing assistance adds value because it usually feels more natural and refined.
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.
91
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 sensing should improve control by responding to rider effort.
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.
Overview
The Trek Powerfly FS+ 4 800Wh Gen 4 is a capable mountain bike built for trail riding, offering strong motor support and reliable braking for off-road adventures. Its high-capacity battery provides good range for most trips, and the removable battery adds convenience for charging and storage. However, the charging time is notably slow, and the bike's weight may make it less easy to lift or maneuver in tight spaces. While the motor delivers strong assistance, the power delivery can feel a bit abrupt in certain situations, which might require some adjustment for riders used to smoother e-bike performance.
Best For
✓
This mountain e-bike should suit riders who prioritize off-road performance, confident braking, and a strong battery setup for longer rides. Its high-capacity battery and powerful motor 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 and control on uneven surfaces, making it a practical option for those who frequently ride on trails or mixed terrain. Riders who appreciate the flexibility of a removable battery for convenient charging away from the bike will 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 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.
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 £4,150, the Trek Powerfly FS+ 4 800Wh Gen 4 looks favourably positioned against similar mountain bikes from 2026, offering a strong balance of capacity and performance. Its main trade-off may be the lack of advanced suspension tuning options found on some competitors.
Compared with similar mountain bike e-bikes on Bikkerr, this model sits £1,508.07 below average
Lowest price now: £3,700.00Best price ever seen:
£3,700.00Price drop detectedPrices update every ~24 hours
The Trek Powerfly FS+ 4 800Wh Gen 4 is listed at £4,150, and this price looks favourable when compared with similar mountain e-bikes from the same year. It stands out with a strong 800Wh battery capacity and 85Nm of torque, which should provide solid hill support and control on rough terrain, and its power-to-weight ratio is competitive for this type of bike. However, some similar models may offer a slightly greater range, which could be important for longer off-road rides. For a mountain e-bike focused on trail performance and reliability, the combination of battery size, torque and braking confidence makes the price easier to understand. Riders prioritising strong motor support, responsive handling and a well-rounded package for off-road use are likely to see the value here. The trade-off in range may be less of a concern for those who ride shorter trails or can plan charging stops.
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 4,150.
The bike appears to save around GBP 513 versus the average.
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 heavier2 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.
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 2.24.
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
24.41 W/kg
▲ 4.0 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 Sensor
Removable Battery
Yes
Motor Name
Bosch Performance Line CX (Gen 5)
This mountain e-bike offers a strong and responsive motor setup that should feel capable and lively on trails, with assistance that scales naturally with rider effort. The motor support should compare well against similar e-bikes, providing good climbing and low-speed traction assistance without feeling overly aggressive. The torque should help with hill climbing and rough terrain, while the torque sensor should make the assistance feel more natural and proportional to pedaling effort. The power-to-weight balance should contribute to a more responsive ride, though the range may be more limited than some similar models, which could affect longer rides. Riders looking for a capable trail e-bike with strong motor support and natural assistance 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 long off-road rides, thanks to its mountain bike design, hydraulic disc brakes, and high-capacity battery, which should provide reliable performance on trails. However, the range is slightly below average, so longer rides may require careful planning or additional charging. The bike's weight may also make it a bit harder to lift or maneuver in tight spaces, but the removable battery adds convenience for charging and storage.
How does the motor perform when climbing steep trails?
The motor should provide strong support when climbing steep trails, thanks to its high power and above-average torque. This should help with acceleration and maintaining momentum on inclines. However, the power delivery may feel a bit abrupt in some situations, so riders might need to adjust their expectations or riding style for smoother assistance.
Does the bike handle rough terrain comfortably with its suspension?
The Trek Powerfly FS+ 4 800Wh Gen 4 is designed for mountain biking, and its suspension should handle rough terrain reasonably well for most trail conditions. However, the bike's weight of 24.58 kg may make it feel less agile on very technical or uneven trails. The suspension is likely adequate for typical off-road use, but riders looking for extreme trail performance might want to consider a bike with more advanced suspension features.
Is the battery capacity enough for extended mountain biking sessions?
The 800Wh battery should provide enough power for most mountain biking sessions, especially with the bike's strong motor support. However, the range is below average for this type of e-bike, so longer rides may require careful planning or carrying a spare battery. The removable battery adds convenience for charging, but the slower charging time could be a consideration for frequent or extended use.
How practical is the removable battery for charging and storage?
The removable battery on the Trek Powerfly FS+ 4 800Wh Gen 4 is quite practical for charging and storage. You can easily take the battery out to charge it separately, which is convenient if you're at home or need to recharge while on the go. This feature also makes it easier to store the bike in smaller spaces, as the battery can be removed and kept elsewhere. However, the charging time is above average, so you may need to plan ahead for longer trips.
Is this bike good value for money compared to similar e-bikes?
The Trek Powerfly FS+ 4 800Wh Gen 4 offers a strong set of features for a mountain e-bike, including a high-capacity battery, reliable braking, and a powerful motor. While the price is on the higher side, the bike's performance and build quality justify the cost for serious off-road riders. However, the slower charging time and slightly below-average range may be considerations for those needing frequent or longer rides. Overall, it's a solid choice for trail riders who prioritize capability over convenience factors like charging speed.
What are the main limitations of this bike for serious off-road use?
While this mountain bike is well-suited for most trail riding, it has a few limitations for serious off-road use. The bike's weight, which is above average for its type, may make it harder to lift or maneuver in tight or technical sections. Additionally, the range is below average, so longer rides may require careful planning or extra batteries. The charging time is also slower than average, which could be inconvenient if you need to recharge quickly after a ride.
How does the bike's weight affect its portability and handling?
The Trek Powerfly FS+ 4 800Wh Gen 4 weighs 24.58 kg, which is above average for a mountain e-bike. This weight can make it slightly more challenging to lift or carry, especially when navigating tight trails or loading it into a vehicle. However, the weight also contributes to stability and control on rough terrain, helping the bike feel more planted during descents and over uneven ground. While it may not be the lightest option, the balance of power and weight should still provide a solid riding experience for most trail conditions.
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″)
Adjustable Sizing
Adjustable saddle height
Folded Dimensions
n/a
Wheel & Tire Details
Wheelset Name
Bontrager Line TLR 30, Tubeless Ready, 28-hole, Presta valve
Integrated within the Bosch Performance Line CX motor unit
Brakes
Brakes
Tektro Gemini SL 4-piston hydraulic disc brakes with 203 mm CentreLock rotors
Brake Type: Hydraulic Disc Brake
Hydraulic operated discs brakes (Very good)
Brake Rotors
4-piston hydraulic disc
Shifters
Shimano CUES 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 Powerfly FS+ 4 800W is a full-power full suspension electric mountain bike for taking on alpine adventures. Its powerful Bosch motor gives you a boost for soaring up climbs, while a massive 800 Wh battery keeps you going through your longest adventures. A RockShox suspension package (120 mm rear, 130 mm front) smooths out rough trails, while a 10-speed Shimano CUES drivetrain delivers clean-shifts for any kind of trail. - The Powerfly FS+ giv ... Read More
The Powerfly FS+ 4 800W is a full-power full suspension electric mountain bike for taking on alpine adventures. Its powerful Bosch motor gives you a boost for soaring up climbs, while a massive 800 Wh battery keeps you going through your longest adventures. A RockShox suspension package (120 mm rear, 130 mm front) smooths out rough trails, while a 10-speed Shimano CUES drivetrain delivers clean-shifts for any kind of trail. - The Powerfly FS+ gives you the powerful boost you crave on high alpine climbs, confident comfort on descents and a big battery for getting far out there Powerfly FS+ gives you the powerful boost you crave on high alpine climbs, confident comfort on descents, and a big battery for getti - Bosch's Performance Line CX motor delivers plenty of torque for steep, punchy climbs and is easy to control with the Purion 200 remote - plus you can customise it in the eBike Flow app Bosch's Performance Line CX motor delivers plenty of torque for s - Its RIB 2.0 removable integrated battery is easy to remove for travel and storage, and its virtually rattle-free while you ride Its RIB 2.0 removable integrated battery is easy to remove for travel and storage, and virtually rattle-free while you rid - Want even more boost? With the Bosch e-Bike Flow app, you can increase torque to 100 Nm and peak power up to 750W. Want even more boost? With the Bosch e-Bike Flow app, you can increase torque to 100Nm and peak power up to 750W. - It's compatible with Bosch PowerMore booster batteries. Parts can be retrofitted by the dealer It's compatible with Bosch PowerMore booster batteries. Parts can be retrofitted by the dealer Removable Integrated Battery RIB is a one-piece battery and cover with a built-in handle that can easily be removed and re-installed in the frame with no tools and no hassle. It's the most convenient way to remove your battery for transport, security or just easier charging. Bosch Performance Line CX motor The Bosch Performance Line CX sets the standard for eMTB performance with up to 85 Nm of torque and an intelligent eMTB mode with Extended Boost that automatically adjusts the amount of assist based on the terrain. Bosch LED Remote The Bosch smart system LED remote lets you easily change assist modes, activate walk mode or turn on optional lights. The bright LEDs are easy to see in any light, and show you your battery level and assist mode at a glance. Bosch Kiox 300 display The Bosch Kiox 300 is tough, compact and easy to read with a full-colour display. Keep ride data right where you can see it including rider power, motor output, speed, remaining range and more. Adventure-ready accessories The Powerfly Equipped gives you maximum utility thanks to pre-installed accessories. You get a kickstand, front and rear lights, plus mudguards and a rear rack custom made for clean integration. A better way to produce aluminium Starting in 2024, we began removing high-emission aluminium from our manufacturing and replacing it with low-emission aluminium made with renewable energy. By October 2025, nearly every alloy bike we make - this one included - had made the switch, driving a major drop in our footprint.
