Highlights based on this e-bike’s specs, comparisons and practical strengths.
100
Excellent battery efficiency
The bike appears to get strong range from its battery size.
The bike appears to get strong range from its battery size.
The calculated range per battery unit is 158.73.
84
Useful removable battery
The removable battery makes charging, storage and battery handling more flexible.
The removable battery makes charging, storage and battery handling more flexible.
The folding bike format benefits from removable battery flexibility for storage and transport.
The longer charging time makes it more useful to charge the battery separately from the bike.
The folding frame and removable battery combination should make storage and transport more flexible.
83
Good storage practicality
The foldable frame should make the bike much easier to store indoors or in tight spaces.
The foldable frame should make the bike much easier to store indoors or in tight spaces.
The folding bike format is naturally better suited to storage in flats, offices or cars.
The smaller wheel size should help reduce the bike’s storage footprint.
The removable battery can make storage and indoor charging more flexible.
77
Good 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.
Cadence sensing provides basic assist control.
72
Well-equipped for daily use
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.
Rim brakes are usable everyday equipment, though less confidence-inspiring in poor weather.
A foldable frame adds useful everyday storage and transport flexibility.
Payload capacity is average or better, which helps with bags, shopping or daily kit.
The folding bike format adds practical everyday transport flexibility.
66
Fair value for money
The price/value label suggests this bike is very strong value compared with similar options.
The price/value label suggests this bike is very strong value compared with similar options.
The listed price is GBP 799.
The bike appears to save around GBP 3,864 versus the average.
Cadence-sensing assistance still provides basic motor support.
A removable battery adds practical value for charging and storage.
A foldable frame adds practical value for storage, transport or mixed-mode commuting.
The included display or control unit adds useful everyday value.
The bike appears to be a recent or current model.
The release age is recent, which supports value if pricing is competitive.
62
Mixed liftability
The bike weight is average for this type of e-bike.
The bike weight is average for this type of e-bike.
The listed weight is 19.9 kg.
The carbon frame material should help keep weight down.
The foldable frame can make the bike easier to move through tight spaces or store.
The removable battery can reduce the weight when lifting or moving the bike.
The folding bike format is usually easier to move, store or carry short distances.
The smaller wheel size should make the bike more compact and easier to handle off the bike.
Overview
The B’TWIN E-Fold 100 2025 is a compact folding e-bike designed for urban commuting and easy storage, with a lightweight carbon frame that’s simple to fold and carry. Its 200W motor provides smooth support for casual riding, though it lacks the punch needed for steep hills or heavy loads. The bike’s efficient battery offers a reasonable range for short trips, and the removable battery makes charging and storage more convenient. However, the rim brakes feel less confident on descents, and the long charging time may be a drawback for frequent users. Overall, it’s a practical choice for city riders prioritizing portability over power.
Best For
✓
This folding e-bike should suit riders who need a compact, portable option for urban travel or mixed-mode commuting. Its efficient battery use and removable design make it convenient for flexible charging and storage, which is especially useful for those with limited space or who need to carry the bike easily. The lightweight frame and 20-inch wheels also make it a practical choice for short to medium-distance trips in the city.
Who Should Avoid It
×
Riders who prioritize strong braking confidence or faster charging may want to compare alternatives, as this bike uses rim brakes which can feel less secure in wet conditions and has a slower charging time compared to similar folding e-bikes. Riders who frequently need longer range for extended rides may also find the 40-mile range limiting next to rivals in the same category. However, the bike still suits those who value efficient battery use, compact storage, and the convenience of a removable battery for flexible charging.
Ownership considerations
These points highlight practical ownership factors such as maintenance, storage, charging, everyday
handling and bad-weather usability.
47
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.
Rim brakes are simple, but can wear faster in poor weather and wet conditions.
A removable battery makes charging, storage and battery care easier.
The tyre description suggests puncture protection, which should reduce maintenance interruptions.
The carbon frame material can be lightweight, though damage checks may need more care.
83
Good storage practicality
Good
The foldable frame should make the bike much easier to store indoors or in tight spaces.
The foldable frame should make the bike much easier to store indoors or in tight spaces.
The folding bike format is naturally better suited to storage in flats, offices or cars.
The smaller wheel size should help reduce the bike’s storage footprint.
The removable battery can make storage and indoor charging more flexible.
62
Mixed liftability
Mixed
The bike weight is average for this type of e-bike.
The bike weight is average for this type of e-bike.
The listed weight is 19.9 kg.
The carbon frame material should help keep weight down.
The foldable frame can make the bike easier to move through tight spaces or store.
The removable battery can reduce the weight when lifting or moving the bike.
The folding bike format is usually easier to move, store or carry short distances.
The smaller wheel size should make the bike more compact and easier to handle off the bike.
84
Useful removable battery
Good
The removable battery makes charging, storage and battery handling more flexible.
The removable battery makes charging, storage and battery handling more flexible.
The folding bike format benefits from removable battery flexibility for storage and transport.
The longer charging time makes it more useful to charge the battery separately from the bike.
The folding frame and removable battery combination should make storage and transport more flexible.
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.
100
Excellent battery efficiency
Excellent
The bike appears to get strong range from its battery size.
The bike appears to get strong range from its battery size.
The calculated range per battery unit is 158.73.
72
Well-equipped for daily use
Good
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.
Rim brakes are usable everyday equipment, though less confidence-inspiring in poor weather.
A foldable frame adds useful everyday storage and transport flexibility.
Payload capacity is average or better, which helps with bags, shopping or daily kit.
The folding bike format adds practical everyday transport flexibility.
9
Limited bad-weather practicality
Poor
Rim brakes can feel less confidence-inspiring in wet conditions.
Rim brakes can feel less confidence-inspiring in wet conditions.
Built-in lights are not listed, so bad-weather visibility may depend on extra accessories.
The tyre description suggests useful grip or practicality for mixed and wet conditions.
The folding bike format can still be practical for mixed-mode commuting in poor weather.
The bike weight may help it feel more planted in wet or windy conditions.
Frame material is listed as carbon fiber, which gives useful durability and maintenance context.
24
Limited family utility practicality
Poor
The folding bike format can be practical for storage, but usually has less utility capacity.
The folding bike format can be practical for storage, but usually has less utility capacity.
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 120 kg.
A removable battery makes charging easier around family or utility use.
50W more power20 miles more range3 Ah more battery5 kg lighterSame gears
Potential limitations
Areas where this e-bike may be less strong based on its specs and comparisons.
0
Limited motor punch
Motor power is low compared with similar e-bikes.
Motor power is low compared with similar e-bikes.
Torque is average for this type of e-bike.
Power-to-weight is low.
Cadence-only assistance may feel less responsive than torque-sensing support.
The calculated power-to-weight score is 10.05.
0
Not ideal for steep hills
Torque is average for this type of e-bike.
Torque is average for this type of e-bike.
Power-to-weight is low.
Motor power is low compared with similar e-bikes.
The cadence sensor may feel less natural on climbs than a torque sensor.
The bike has very limited gearing, which may make steeper climbs harder.
The calculated power-to-weight score is 10.05.
0
Limited downhill control
No suspension may reduce control and comfort on rough or steeper descents.
No suspension may reduce control and comfort on rough or steeper descents.
The brake type may limit confidence on descents.
0
Not very off-road capable
The folding bike format is usually less suited to rough off-road riding.
The folding bike format is usually less suited to rough off-road riding.
No suspension limits comfort and control on rough off-road terrain.
Rim brakes may be less confidence-inspiring for off-road use, especially in wet or muddy conditions.
Torque is average for this type of e-bike.
The smaller wheel size is usually less suited to rough off-road terrain.
0
Limited braking confidence
Rim brakes are likely to feel less confidence-inspiring on an e-bike, especially in wet conditions or on descents.
0
Limited rough-road comfort
No suspension may make rough roads, potholes and uneven paths feel harsher.
No suspension may make rough roads, potholes and uneven paths feel harsher.
The wheel size can handle some rough surfaces, though larger wheels may roll more smoothly.
Rim brakes may feel less controlled on rougher or wet routes.
The bike weight may help it feel more planted over rough surfaces.
Frame material is listed as carbon fiber, which gives useful comfort and build context.
0
Low power-to-weight ratio
Power-to-weight is low compared with similar e-bikes.
Power-to-weight is low compared with similar e-bikes.
Motor power is low compared with similar e-bikes.
The calculated power-to-weight score is 10.05.
0
Limited technical trail control
The folding bike format is usually less suitable for technical trail riding.
The folding bike format is usually less suitable for technical trail riding.
No suspension is a major limitation for technical trail control.
Rim brakes are a major limitation for technical trail control.
The smaller wheel size is usually less suitable for technical trail control.
Torque is average for this type of e-bike.
Cadence-sensing assistance is usable, but usually less precise than torque sensing on technical terrain.
Multiple ride modes should help the rider manage assistance on technical trails.
E-system & battery comparison
Motor Power
200 watts
▼ 88 W below average
Motor Torque
35 Nm
▼ 1.2 Nm below average
Power-to-weight
10.05 W/kg
▼ 4.6 W/kg below average
Battery Capacity
252 Wh
▼ 114 Wh below average
Claimed Max Range
40 miles
▼ 13 miles below average
Charge Time
6h
▲ 54 mins slower than average
Sensor Type
Cadence Sensor
Removable Battery
Yes
Motor Name
Decathlon proprietary B'TWIN Brushless Rear Hub Motor
This folding e-bike offers a modest level of motor assistance that should feel smooth and predictable for urban riding and short trips, with a focus on manageable support rather than high-speed performance. Next to similar folding e-bikes, its motor support sits in the middle ground, with some models offering more punch and liveliness for their weight. Climbing and acceleration support should be adequate for gentle inclines but may feel less dynamic on steeper hills or when carrying heavier loads. The cadence sensor provides straightforward assistance that is less responsive than torque-sensing systems, which may affect how smoothly the power feels in stop-start city riding. Riders looking for a lightweight, efficient folding e-bike for daily errands and casual use may find this motor setup to be a good match.
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 daily commuting and city riding?
Yes, this bike is well-suited for daily commuting and city riding, especially if you prioritize portability and ease of storage. Its foldable design makes it convenient for storing in small spaces or taking on public transport. The 200W motor provides smooth support for casual urban riding, but you may find it less effective on steep hills. The battery offers a reasonable range for short trips, and the removable battery adds convenience for charging.
How does the motor perform when climbing hills or inclines?
The motor provides adequate support for moderate hills but may struggle with steeper inclines. With 200 watts of motor power and 35 Newton meters of torque, it should handle typical urban gradients, but you may notice some effort on very steep paths. The cadence sensor helps with assistance timing, but the motor's power is on the lower side compared to similar e-bikes, which could affect performance on challenging climbs.
Is the battery efficient enough for regular use and how long does it take to charge?
The battery efficiency is above average for similar folding e-bikes, which means you can expect a reasonable range of 40 miles on a single charge. However, the battery capacity is below average, so if you need longer rides, you may need to charge more frequently. The charging time is 6 hours, which is comparable to similar e-bikes, and the removable battery makes it convenient to charge at home or work.
How easy is it to fold and store this bike in small spaces?
This folding e-bike is designed with storage and portability in mind, and the foldable frame should make it much easier to store indoors or in tight spaces. The removable battery also adds to the convenience, allowing you to charge it separately if needed. While the bike is reasonably light for its type, its liftability may depend on your strength and the space you're working with, but overall, it should be manageable for most users.
Does the bike feel stable and safe when riding at higher speeds or on descents?
The bike's rim brakes may feel less confident on descents, especially in wet conditions, which is common for this type of e-bike. Stability at higher speeds depends on your riding style and terrain, but the folding frame and overall design are more suited for city riding and casual use rather than high-speed or aggressive downhill riding.
Is the range of 40 miles enough for typical daily rides or will I need to charge more frequently?
The 40-mile range should be sufficient for most daily commutes or short trips, especially with the efficient battery use. However, if you frequently ride longer distances or need extended range without recharging, you may need to charge more often. The removable battery makes it convenient to charge at home or work, which helps manage frequent charging needs.
How does the weight of the bike affect its handling and portability?
The bike's weight impacts how it feels when folding and carrying, especially if you need to lift it frequently. A lighter bike is generally easier to handle and transport, though this model's weight is typical for a folding e-bike. The foldable design helps with storage, but the overall weight may affect how easily you can carry it up stairs or into small spaces.
Is this bike good value for money compared to other folding e-bikes in its class?
This bike offers a favourable price point compared to similar folding e-bikes, making it a good value option. However, its battery capacity and range are below average for the category, which may require more frequent charging for longer rides. The efficient use of its battery and removable design add practicality, especially for urban commuters who need flexibility in charging and storage.
eBike Overview
eBike Type: Folding Bike
The style of riding intended for this bike
Released:
2025
The bike was released 1 years ago
Screen
LED control screen
Lights Included
No
Weight (inc battery): 19.9 kg
The website average for electric bikes is
23.93 kg.
This electric bike is 4.04 kg under the average. Total bike weight may vary depending on frame size.
Sizing & Geometry
Min / Max Rider Height
One size: 145–195 cm
Folded Dimensions
Unknown
Wheel & Tire Details
Wheelset Name
20-inch, single-wall aluminium rims laced with 36 steel spokes
Wheelset Size
20 inch
Tires
* 20 x 1.75. * Skinwall technology for better durability, efficiency and grip. To reduce the risk of punctures, optimise your battery range and enjoy a more efficient ride, we recommend inflating your tyres to a pressure of 4.5 bar.This is the maximum pressure for your tyres. We recommend ing your tyre pressure every three weeks.
Frame Info
Frame Material
Carbon Fiber
Suspension Type
No suspension
Foldable Frame
Yes
Max Payload
120 kg (264.6 lbs)
Drivechain Details
Groupset details
Single-speed drivetrain
Drivechain type
Chain drive
Amount of gears
1 Gears
Front Derailleur
None
Cassette
Single-speed freewheel (16-tooth cog)
Cranks
Aluminium 165 mm crank arms paired with a 44-tooth steel chainring
Chain
Standard single-speed KMC chain with an anti-rust treatment
Bottom Bracket
Sealed cartridge bottom bracket with square-taper axle interface
