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.
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.
61
Decent rider 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.
Ride mode information is listed, giving some insight into assist control.
Cadence sensing provides basic assist control.
53
Decent everyday equipment
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.
Rim brakes are usable everyday equipment, though less confidence-inspiring in poor weather.
A foldable frame adds useful everyday storage and transport flexibility.
The folding bike format adds practical everyday transport flexibility.
Overview
The B’TWIN E-Fold 100 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 flat to gently rolling terrain, though it lacks the punch needed for steep hills or heavy loads. The removable 252Wh battery offers decent range for short trips, but the slow 6-hour charge time and limited capacity mean frequent recharging for longer rides. Rim brakes are adequate for city use but may feel less confident in wet conditions. Overall, it’s a practical, portable option for casual riders who prioritize convenience over performance.
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 charging and storage in tight spaces. The lightweight frame and foldable design also make it a practical choice for riders who need to transport the bike easily or use it for short, frequent trips.
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 e-bikes. Riders needing a larger battery or more refined power delivery might also find stronger options in the same category. However, the bike still suits those who value efficient battery use, compact storage and flexible charging options.
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.
53
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.
Rim brakes are usable everyday equipment, though less confidence-inspiring in poor weather.
A foldable frame adds useful everyday storage and transport flexibility.
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.
10
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.
The listed maximum payload is 110 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.
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
Unbranded / Decathlon proprietary brushless rear hub-drive motor
This folding e-bike offers a modest level of motor assistance that should feel smooth and predictable for urban riding and short trips. Next to similar models, its motor support is more restrained, which may make it feel less punchy when accelerating or climbing steeper hills. The cadence sensor provides straightforward assistance that should be easy to manage in city conditions, though it may not be as responsive or nuanced as torque-sensing systems. Riders looking for a lightweight, portable e-bike that prioritises efficiency over strong motor punch may 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 daily commuting and folding into small spaces?
Yes, the B’TWIN E-Fold 100 is designed with folding convenience in mind, making it a great option for daily commuting and storing in small spaces. Its lightweight frame and compact design allow for easy folding and carrying, whether you're heading to work or taking it on public transport. However, the 40-mile range may require more frequent charging for longer commutes, and the 200W motor may feel less powerful when climbing hills or accelerating from a stop.
How does the motor perform when climbing hills or accelerating from a stop?
The motor provides smooth support for climbing hills and accelerating from a stop, but it may feel less punchy compared to more powerful e-bikes. With 200 watts of motor power and 35 Newton meters of torque, it should handle moderate inclines and city traffic, but steeper hills may require more effort. The cadence sensor helps with assistance timing, but the motor's performance is best suited for everyday commuting rather than aggressive acceleration or heavy climbing.
What is the real-world range on a single charge, and is it enough for regular use?
The bike offers a real-world range of 40 miles on a single charge, which should be sufficient for most daily commutes or short trips. However, this range is below average for similar folding e-bikes, so if you need longer rides without recharging, you may need to plan for additional charging stops. The battery efficiency is above average, meaning you get good mileage from the battery size, and the removable battery makes it easier to charge at home or work.
How easy is it to charge the battery, and how long does it take to fully charge?
The battery is removable, which makes charging convenient, especially if you need to charge it away from home. It takes around 6 hours to fully charge, which is a bit slower than average for similar e-bikes. This charging time may be something to consider if you need a quick top-up during a busy day of commuting or travel.
Does the bike feel stable and safe to ride, especially at higher speeds or on descents?
The bike should feel stable for most everyday use, but the rim brakes may not inspire much confidence on descents or at higher speeds, especially in wet conditions. This is common with rim brakes on e-bikes, as they can be less effective compared to disc brakes. For safety on descents, you may want to ride at a more cautious pace or consider the brake type when choosing an e-bike for more demanding terrain.
Is this bike a good value option compared to other folding e-bikes in its price range?
This bike offers a reasonable value for a folding e-bike in its price range, especially considering its efficient battery use and convenient removable battery. While its motor power and battery capacity are below average for similar models, the price is favourable, and the bike is well-suited for folding and storage. It may not be the most powerful option, but it should handle everyday commuting and short trips effectively.
How does the bike handle when folded, and is it easy to carry or store?
The bike folds down to a compact size, making it easier to store in small spaces or transport on public transit. The foldable frame is designed for convenience, though the weight is average for this type of e-bike, so lifting it may require some effort. The removable battery adds to the practicality, allowing you to charge it separately from the bike if needed.
What are the main limitations of this bike that I should be aware of before buying?
This bike has a few limitations to consider. The motor power and torque are below average for similar folding e-bikes, which may make climbing steeper hills or accelerating from a stop feel less responsive. Additionally, the rim brakes, while functional, may not provide the same level of confidence as hydraulic brakes, especially in wet conditions or on descents. The battery capacity is also lower than average, which could limit the range for longer commutes or frequent use.
eBike Overview
eBike Type: Folding Bike
The style of riding intended for this bike
Released:
2024
The bike was released 2 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 with steel hubs
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
110 kg (242.5 lbs)
Drivechain Details
Groupset details
Single-speed drivetrain
Drivechain type
Chain drive
Amount of gears
1 Gears
Rear Derailleur
None
Front Derailleur
None
Cassette
Single-speed freewheel (16 teeth)
Cranks
Steel cranks with a 52-tooth chainring and integrated double chain guard
Chain
Standard anti-rust single-speed chain
Bottom Bracket
Standard square-taper sealed cartridge bottom bracket with an integrated pedalling cadence sensor
