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.
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.
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.
83
Good range-to-weight balance
Range is high compared with similar e-bikes.
Range is high compared with similar e-bikes.
The bike weight is average for this type of e-bike.
Battery efficiency appears strong, which supports a better range-to-weight balance.
Range is strong without needing an unusually large battery, which supports efficiency.
The calculated range per kg is 3.88.
The calculated range per battery unit is 184.52.
83
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.
This bike type can be larger or heavier, so a removable battery adds useful charging flexibility.
The longer charging time makes it more useful to charge the battery separately from the bike.
76
Good braking confidence
Hydraulic disc brakes should provide strong and controlled stopping power.
Overview
The Polygon SISKIU HE (SHIMANO) 2025 is a mountain bike designed for trail riding and rough terrain, offering a smooth and comfortable experience with its front and rear suspension. It provides useful assistance for climbing and handling uneven surfaces, though its motor power and torque are modest, which may limit performance on steep inclines. The bike's efficient battery delivers a decent range, and the removable battery adds convenience for charging and storage. While it's well-suited for off-road adventures, its weight and slower charging time mean it's not the best choice for those needing quick recharges or frequent hauling.
Best For
✓
This mountain e-bike should suit riders who enjoy trail riding and off-road adventures, particularly those looking for a balance between performance and value. Its strong hill support, responsive torque sensor, and front and rear suspension make it well-suited for rougher terrain and more demanding trails. The removable battery and decent range also make it a practical choice for longer rides or multi-day excursions, while the hydraulic disc brakes provide confidence in varied conditions.
Who Should Avoid It
×
Riders seeking a more powerful motor or faster charging may want to compare alternatives, as this bike has a lower motor power and slower charge time compared to similar mountain e-bikes. Riders who frequently tackle very steep hills or need a larger battery for extended off-road trips could find stronger options in the same category. However, the bike still offers good off-road capability, removable battery convenience, and comfortable handling on rough terrain, which may suit riders prioritizing these features over raw power and charging speed.
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 removable battery can make storage and indoor charging more flexible.
A full-suspension mountain bike format is usually bulkier and harder to store indoors.
30
Some lifting limitations
Weak
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 24 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.
83
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.
This bike type can be larger or heavier, so a removable battery adds useful charging flexibility.
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 184.52.
57
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.
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.
48
Some family utility limitations
Weak
Payload capacity is above average for this type of e-bike.
Payload capacity is above average for this type of e-bike.
The listed maximum payload should be useful for family or utility riding.
The listed maximum payload is 150 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 power18 miles less range4 Wh less battery1 kg lighterSame gears
Click the tab to load better value options.
Click the tab to load closest price options.
Click the tab to load longer range options.
Click the tab to load higher power options.
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 calculated power-to-weight score is 10.42.
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.
Payload capacity is strong compared with similar e-bikes, which helps with bags, shopping or extra kit.
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 calculated power-to-weight score is 10.42.
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 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.
5
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 calculated power-to-weight score is 10.42.
5
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.
12
Low battery capacity
Battery capacity is low compared with similar e-bikes.
Battery capacity is low compared with similar e-bikes.
The listed battery capacity should be practical for regular riding.
E-system & battery comparison
Motor Power
250 watts
▼ 190 W below average
Motor Torque
85 Nm
▲ 6.5 Nm above average
Power-to-weight
10.42 W/kg
▼ 9.9 W/kg below average
Battery Capacity
504 Wh
▼ 127 Wh below average
Claimed Max Range
93 miles
▲ 32 miles above average
Charge Time
10h
▲ 285 mins slower than average
Sensor Type
Torque Sensor
Removable Battery
Yes
Motor Name
Shimano STEPS DU-EP 600 (EP 6)
This mountain e-bike offers legal-style pedal assist with strong torque support, making it feel natural and proportional to rider effort on trails. Next to similar e-bikes, it should provide solid climbing and low-speed control, though some models may offer more outright punch or liveliness for their weight. The torque should help on climbs and rough terrain, and the motor’s efficiency should support a strong range for trail riding. With a torque sensor, the assistance should feel responsive and well-tuned to rider input, though it may not be the most aggressive option in its category. Riders looking for reliable trail support with good battery efficiency and predictable power delivery should find this motor 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 e-bike is well-suited for long off-road rides, thanks to its front and rear suspension that improves comfort on rough terrain. The bike offers a decent range of 93 miles, which should support extended trail rides, and the removable battery adds convenience for charging. However, its motor power is on the lower side for this type of e-bike, which may affect performance on very steep or technical trails.
How does the motor perform when climbing steep trails?
The motor provides smooth support for climbing trails, but its performance on very steep inclines may be limited due to the bike's lower motor power and power-to-weight ratio compared to similar e-bikes. The torque is above average for this type of e-bike, which helps with hill climbing, but the motor may struggle with extremely steep or technical trails. For most mountain trails, the motor should be adequate, but riders expecting high-performance climbs may find this bike slightly less capable than others in its class.
Does the bike offer good comfort on rough terrain?
The bike should offer good comfort on rough terrain, thanks to its front and rear suspension, which should help absorb shocks and vibrations from uneven surfaces. The mountain bike design and tire size also contribute to a stable and comfortable ride on trails. However, while it's well-suited for off-road use, it may not be as comfortable for long stretches of rough road compared to more specialized trail or gravel bikes.
Is the battery efficient enough for regular mountain biking use?
The battery efficiency is above average for similar mountain e-bikes, which means you can expect a good range for regular off-road use. With a range of 93 miles, it should handle most trail rides comfortably, though the battery capacity is below average, which may impact longer rides. The removable battery adds convenience for charging, but the charging time is above average at 10 hours, so you should plan accordingly for extended trips.
How long does it take to charge the battery, and is that a concern?
The battery takes around 10 hours to fully charge, which is longer than average for similar mountain e-bikes. This could be a concern if you need to recharge quickly after a ride, but the removable battery makes it easier to charge at home or on the go. The bike's strong range means you may not need to charge as often on longer rides, which helps balance the slower charging time.
Is this bike a good value option compared to similar mountain e-bikes?
This bike offers good value for money compared to similar mountain e-bikes, especially considering its strong range and off-road capability. While the motor power and battery capacity are below average for this category, the overall efficiency and price make it a competitive option. The hydraulic disc brakes provide confident stopping power, and the chain drive is reliable, though it requires more maintenance than other drive types.
How does the bike handle in terms of trail control and stability?
The bike offers good trail control, thanks to its mountain bike design and front and rear suspension, which should help maintain stability on uneven terrain. Hydraulic disc brakes provide confident stopping power, which is important for managing speed on technical trails. The combination of suspension and braking should make it a solid choice for trail riding, though it's best suited for moderate to challenging trails rather than extreme off-road conditions.
What are the main compromises or limitations of this bike?
This bike has a few limitations to consider. The motor power is below average for similar mountain e-bikes, which may affect acceleration and performance on steeper trails. Additionally, the charging time is above average, taking around 10 hours to fully charge the battery, which could be a concern for riders who need quick turnaround times. However, the bike offers a good balance of range, comfort, and value for money, making it a solid choice for most off-road riding scenarios.
eBike Overview
eBike Type: Mountain Bike
The style of riding intended for this bike
Released:
2025
The bike was released 1 years ago
Screen
Shimano STEPS SC‑EN600 1.4” LCD Screen
Lights Included
No
Weight (inc battery): 24 kg
The website average for electric bikes is
22.99 kg.
This electric bike is 1.00 kg over the average. Total bike weight may vary depending on frame size.
Sizing & Geometry
Min / Max Rider Height
S: 153–165 cm, M: 163–175 cm, L: 173–185 cm, XL: 183–195 cm
Folded Dimensions
Unknown
Wheel & Tire Details
Wheelset Name
Alloy double-wall rims (35 mm inner width, 32-hole, tubeless-ready) built onto Shimano TC 500 hubs (15 x 110 mm front / 12 x 148 mm rear)
