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.
90
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 longer charging time makes it more useful to charge the battery separately from the bike.
88
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.
87
Excellent smooth power delivery
Torque and cadence sensing should help the motor deliver more natural and controlled assistance.
Torque and cadence sensing should help the motor deliver more natural and controlled assistance.
Multiple ride modes should help riders choose a smoother level of assistance.
The included display or control unit should make it easier to manage assistance levels.
87
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 27.5-inch wheel size should help balance control and manoeuvrability.
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.
Multiple ride modes should help the rider manage assistance on technical trails.
86
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 mountain bike design should be better suited to controlled descending.
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.
83
Good 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 27.5-inch wheel size should balance manoeuvrability and trail control.
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.
Overview
The Polygon SISKIU HE GRAY is a mountain bike designed for off-road adventures, offering a smooth and controlled ride with its front and rear suspension system. Its efficient battery provides a useful range for most trails, and the removable battery adds convenience for charging and storage. The motor delivers steady support that feels natural, though it may lack the punch needed for steep climbs or high-speed acceleration. While the bike is well-suited for rough terrain, its heavier weight and slower charging time are notable considerations for everyday use.
Best For
✓
This mountain e-bike should suit riders who enjoy trail riding and want a balance of comfort, control and practicality on rougher terrain. Its strong off-road capability, smooth power delivery and front and rear suspension make it a solid choice for trail riders looking for confidence and comfort on uneven surfaces. The removable battery and good range also make it appealing for longer rides or riders who need flexible charging options. Riders who prioritize value for money may also find it particularly attractive compared to similar models in its category.
Who Should Avoid It
×
Riders seeking the most aggressive trail performance or quick acceleration may want to compare alternatives, as the motor power is lower than similar mountain e-bikes and the power-to-weight ratio is also lower. Riders who need faster charging times or frequently lift the bike may also find stronger options available, though the bike still offers good range and practical features like a removable battery 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.
21
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 28.5 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.
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 high compared with similar e-bikes.
Charging time is high compared with similar e-bikes.
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 176.19.
Range is strong despite only average or smaller battery capacity, which supports the efficiency result.
62
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.
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.
25
Limited family utility practicality
Poor
The listed maximum payload is practical for lighter utility use.
The listed maximum payload is practical for lighter utility use.
The listed maximum payload is 120 kg.
Hydraulic disc brakes are useful when carrying children, shopping or heavier loads.
A removable battery makes charging easier around family or utility use.
Range is average or better compared with similar e-bikes, which supports practical daily use.
Same power1 miles less range130 Wh less battery5 kg lighter1 fewer gears
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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 above average for this type of e-bike.
Power-to-weight is low.
Torque-sensing assistance should make the motor response feel more natural.
The bike is heavier than average for its type.
The calculated power-to-weight score is 8.77.
0
Not ideal for steep hills
Torque is above average for this type of e-bike.
Torque is above average for this type of e-bike.
Power-to-weight is low.
Motor power is low 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 8.77.
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 average or better compared with similar e-bikes, which supports commuting practicality.
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.
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
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 bike is heavy compared with similar e-bikes, which affects the power-to-weight balance.
The calculated power-to-weight score is 8.77.
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 high compared with similar e-bikes.
Charging time is high compared with similar e-bikes.
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.
21
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 28.5 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.
E-system & battery comparison
Motor Power
250 watts
▼ 190 W below average
Motor Torque
85 Nm
▲ 6.5 Nm above average
Power-to-weight
8.77 W/kg
▼ 12 W/kg below average
Battery Capacity
630 Wh
▼ 0.9 Wh below average
Claimed Max Range
111 miles
▲ 50 miles above average
Charge Time
10h 12m
▲ 297 mins slower than average
Sensor Type
Torque and Cadence Sensor
Removable Battery
Yes
Motor Name
Shimano DU-EP 600
This mountain e-bike offers a legal-style pedal assist with strong torque support that should feel capable on climbs and low-speed rough terrain. Next to similar e-bikes, it provides a balanced and predictable assistance feel, though some models may offer more outright punch or liveliness for their weight. The motor should help with climbing and loaded riding, but the bike's higher weight may make starts and low-speed riding feel more dependent on the motor's support. With torque and cadence sensing, the assistance should feel natural and responsive, allowing for control over the level of support. Riders looking for a reliable and efficient motor that supports trail riding and longer rides with good range 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 long off-road rides?
This mountain bike is well-suited for long off-road rides, thanks to its front and rear suspension system that improves comfort on rough terrain. The bike offers a useful range of 111 miles, which should cover most trail rides, and the removable battery adds convenience for charging. However, its heavier weight and slower charging time may be considerations for frequent or extended use.
How does the motor perform when climbing steep trails?
The motor provides smooth and controlled assistance when climbing steep trails, thanks to the torque and cadence sensor. However, the motor power is below average for similar e-bikes, which may make climbing very steep trails feel slightly less responsive. The torque is above average, which should help with maintaining momentum on inclines, but the overall power-to-weight ratio is low, so you may need to manage your effort on the steepest sections.
Does the bike offer good comfort on rough terrain?
Yes, the bike should offer good comfort on rough terrain, thanks to its front and rear suspension system, which is designed to absorb shocks and vibrations from uneven surfaces. The tire size and tread pattern also contribute to stability and grip on rough trails. However, while it's well-suited for off-road comfort, it may not be the most practical choice for daily urban commuting due to its mountain bike design and weight.
Is the battery efficient enough for regular use?
The battery should be efficient enough for regular use, especially considering the range of 111 miles, which is above average for similar mountain e-bikes. However, the charging time of 10.2 hours is longer than average, so you may need to plan charging sessions ahead of time. The battery is also removable, which adds convenience for charging and storage.
How practical is the removable battery for charging and storage?
The removable battery is practical for charging and storage, offering flexibility to charge the battery separately from the bike. This can be convenient if you need to charge it at home or while traveling. However, the charging time is above average for similar e-bikes, so you may need to plan ahead for longer charging sessions.
Is this bike a good value option compared to similar e-bikes?
This bike offers strong value for money compared to similar e-bikes, especially considering its above-average range and battery efficiency. While the motor power and power-to-weight ratio are below average, the overall package is competitively priced and well-suited for off-road use. The Shimano hydraulic brakes and removable battery also add to its practicality and appeal for trail riding.
How does the weight of the bike affect its handling and portability?
The bike's weight of 28.5 kg is typical for a mountain e-bike and should feel balanced for off-road trails, though it may require more effort to lift when carrying it. This weight, combined with front and rear suspension, should provide stable handling on rough terrain, but it's not the lightest option for trail riding. If portability is a concern, the removable battery helps with charging and storage, but the overall weight may still impact ease of transport.
What are the main limitations of this e-bike for serious off-road use?
This e-bike is designed for mountain biking and offers good off-road capability with front and rear suspension, hydraulic disc brakes, and a powerful motor. However, its weight of 28.5 kg may make it less agile on very technical trails, and the battery range of 111 miles is above average for similar e-bikes but may require careful planning for extended off-road trips. The non-removable battery also means you'll need to charge it at home or carry a charger with you for longer rides.
eBike Overview
eBike Type: Mountain Bike
The style of riding intended for this bike
Released:
2024
The bike was released 2 years ago
Screen
Shimano SC-EN 600
Lights Included
No
Weight (inc battery): 28.5 kg
The website average for electric bikes is
22.99 kg.
This electric bike is 5.50 kg over the average. Total bike weight may vary depending on frame size.
Sizing & Geometry
Min / Max Rider Height
SM: 157–168 cm, MD: 168–178 cm, LG: 178–185 cm, XL: 185–193 cm
Folded Dimensions
Unknown
Wheel & Tire Details
Wheelset Name
27.5-inch Double-wall Aluminium utility rims laced with stainless steel 14 G spokes
