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.
100
Excellent power-to-weight ratio
Power-to-weight is high compared with similar e-bikes.
Power-to-weight is high compared with similar e-bikes.
Motor power is high for this type of e-bike.
The bike is lighter than many similar e-bikes, which helps the power-to-weight balance.
The calculated power-to-weight score is 187.5.
100
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 tyre description suggests useful grip for trail surfaces.
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.
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 119.05.
Range is strong despite only average or smaller battery capacity, which supports the efficiency result.
100
Excellent range-to-weight balance
Range is high compared with similar e-bikes.
Range is high compared with similar e-bikes.
The bike is very light compared with similar e-bikes, which strongly supports range-to-weight balance.
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 23.44.
The calculated range per battery unit is 119.05.
95
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 29-inch wheel size should help rollover and stability on technical terrain.
Torque is above average for this type of e-bike.
Torque-sensing assistance should help with smoother control on technical sections.
Power-to-weight is strong, which should help with technical sections that need quick support.
Multiple ride modes should help the rider manage assistance on technical trails.
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.
Overview
The Polygon SISKIU T7E 2024 is a capable mountain e-bike designed for trail riding and off-road adventures, offering strong motor support and a responsive feel that makes climbing hills and navigating rough terrain manageable. Its efficient battery provides a decent range for most trips, and the removable battery adds convenience for charging and storage. The hydraulic disc brakes offer confident stopping power, while the front and rear suspension help absorb shocks for a more comfortable ride over uneven surfaces. However, the charging time is on the slower side, and the battery capacity is average for this type of bike, which may limit longer rides without a recharge.
Best For
✓
This mountain e-bike should suit riders who prioritize off-road performance, trail control and hill climbing support. Its high torque and power-to-weight ratio make it particularly effective for climbing and handling rough terrain, while the front and rear suspension should enhance comfort and control on uneven trails. The above-average range and removable battery also make it a practical choice for longer rides or riders who need flexibility with charging and storage.
Who Should Avoid It
×
Riders carrying heavier loads may want to compare utility-focused alternatives, as the bike's max payload is on the lower side for a mountain e-bike. Riders prioritizing faster charging or significantly larger battery capacity may find stronger options within the same category, as the charging time and battery capacity are average for this type of e-bike. However, the bike still suits riders who value strong hill climbing, responsive assistance, and solid off-road performance.
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.
5
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 lighter than many similar e-bikes, which should make storage and moving it around easier.
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.
62
Mixed liftability
Mixed
The bike is very light compared with similar e-bikes, which should make it easier to lift and move.
The bike is very light compared with similar e-bikes, which should make it easier to lift and move.
The listed weight is 3.2 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.
78
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.
23
Very slow charging speed
Poor
Charging time is average for this type of e-bike.
Charging time is 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 119.05.
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.
40
Some bad-weather limitations
Weak
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.
A very light e-bike may feel less planted in poor weather 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.
20
Limited family utility practicality
Poor
The listed maximum payload is 110 kg.
The listed maximum payload is 110 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 powerSame range5 Wh less battery23 kg heavierSame gears
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Potential limitations
Areas where this e-bike may be less strong based on its specs and comparisons.
5
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 lighter than many similar e-bikes, which should make storage and moving it around easier.
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.
9
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 average or better, which is useful for regular commuting.
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 lighter than many similar e-bikes, which helps with daily handling.
Front and rear suspension can add weight and complexity for normal commuting.
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.
20
Limited family utility practicality
The listed maximum payload is 110 kg.
The listed maximum payload is 110 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.
23
Very slow charging speed
Charging time is average for this type of e-bike.
Charging time is average for this type of e-bike.
The quoted charging time is long in absolute terms.
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.
32
Some stability limitations
The mountain bike format should feel stable on uneven or rougher routes.
The mountain bike format should feel stable on uneven or rougher routes.
A very light e-bike may feel less planted in poor surfaces, wind or fast everyday riding.
The larger wheel size should support a more stable and settled ride feel.
Hydraulic disc brakes should add confidence and control to the overall ride feel.
Suspension should help the bike feel more settled over uneven surfaces.
Frame material is listed as aluminium, which gives useful build and ride-feel context.
35
Limited battery capacity
Battery capacity is average for this type of e-bike.
Battery capacity is average for this type of e-bike.
The listed battery capacity should be practical for regular riding.
E-system & battery comparison
Motor Power
600 watts
▲ 160 W above average
Motor Torque
85 Nm
▲ 6.5 Nm above average
Power-to-weight
187.50 W/kg
▲ 167 W/kg above average
Battery Capacity
630 Wh
▼ 0.9 Wh below average
Claimed Max Range
75 miles
▲ 14 miles above average
Charge Time
5h
▼ 15 mins faster than average
Sensor Type
Torque Sensor
Removable Battery
Yes
Motor Name
Shimano STEPS DU-EP 801
This mountain e-bike offers a strong and responsive motor setup that should feel capable and lively on trails, with good support for climbing and low-speed control. Against similar e-bikes, the motor's power and torque should provide a noticeable edge in terms of acceleration and hill-climbing ability, especially when paired with the bike's suspension and trail-focused design. The torque sensor should help the assistance feel more natural and proportional to rider effort, making it easier to manage technical terrain or rough trails. The motor's power-to-weight balance should contribute to a more agile and responsive ride, which is likely to suit riders looking for a mountain e-bike that feels lively and well-suited to varied trail conditions.
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 strong motor support, which helps with climbing and navigating rough terrain. The bike has a decent range of 75 miles, which should cover most trail rides, and the hydraulic disc brakes provide confident stopping power. However, the battery capacity is average for this type of bike, so you may need to plan for recharging if you're riding for extended periods without access to a power source.
How does the motor perform when climbing steep trails?
The motor should provide strong support when climbing steep trails, thanks to its above-average torque and power-to-weight ratio for mountain e-bikes. This should help you tackle challenging inclines with confidence, though the power delivery may feel slightly less smooth in some situations. The motor's performance is well-suited for off-road climbing, making it a solid choice for trail riders.
Does the bike offer good comfort on rough terrain?
The bike should handle rough terrain reasonably well, thanks to its front and rear suspension, which should help absorb shocks and improve comfort on uneven surfaces. However, while the suspension should make a noticeable difference, the overall comfort on very rough or rocky terrain may depend on your personal preferences and the specific conditions you ride in.
Is the battery efficient enough for regular mountain biking use?
The battery should provide enough range for regular mountain biking use, with a range of 75 miles, which is above average for similar e-bikes. The battery efficiency is also strong, meaning you can expect good performance per charge. However, the battery capacity is average for this type of e-bike, so if you frequently ride long distances or in challenging terrain, you may need to plan for additional charging stops.
How easy is it to charge and maintain the battery?
The battery is removable, which makes charging convenient, especially if you're riding in remote areas. It takes around 5 hours to fully charge, which is average for similar mountain e-bikes. While the battery capacity is in line with others in its class, the range of 75 miles is above average, meaning you can ride longer before needing to recharge.
Is this bike a good value option compared to similar mountain e-bikes?
This bike offers a good value option compared to similar mountain e-bikes, especially considering its above-average range, motor power, and power-to-weight ratio. The price is favourable for the features included, and the battery efficiency is strong for regular mountain biking use. While the battery capacity is average for this type of e-bike, the overall performance and practicality make it a competitive choice in its category.
How does the bike handle in terms of weight and maneuverability?
The bike's weight of 3.2 kg makes it reasonably light for a mountain e-bike, which should help with maneuverability on trails. However, its 29-inch wheels and full suspension system are designed for off-road performance, which may make it slightly less agile in tight, technical sections compared to smaller-wheeled e-bikes. The overall balance between weight and trail-ready features should make it a solid choice for most mountain biking scenarios.
What are the main trade-offs or limitations of this bike?
This bike is well-suited for off-road trails, but there are a few trade-offs to consider. The frame doesn't fold, so storage will depend on its size and weight, which may be less convenient for some users. While the charging time is average for similar e-bikes, it's not the fastest available. Additionally, the chain drive system, while reliable, requires more frequent cleaning and lubrication compared to belt drives. These factors may affect convenience and maintenance effort for some riders.
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 STEPS SC-EN 600 LCD color display unit
Lights Included
No
Weight (inc battery): 3.2 kg
The website average for electric bikes is
22.99 kg.
This electric bike is 19.8 kg under 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
Entity XL 3 Tubeless Ready alloy rims laced to Shimano MT 400 Boost hubs (110 x 15 mm front / 148 x 12 mm rear)
Wheelset Size
29 inch
Tires
SCHWALBE HANS DAMPF EVO TIRE 29"x2.60" 622x65 SUPER TRAIL, TLE, ADDIX SPEED GRIP
Frame Info
Frame Material
Aluminium
Suspension Type
Front and Rear suspension
Foldable Frame
No
Max Payload
110 kg (242.5 lbs)
Drivechain Details
Groupset details
SLX
Drivechain type
Chain drive
Shifters
Shimano SLX SL-M 7100-R 12-Speed Trigger
Amount of gears
12 Gears
Rear Derailleur
Shimano SLX RD-M 7100-SGS 12-Speed
Front Derailleur
None
Cassette
Shimano Deore CS-M 6100 12-speed (10-51 T gear range)
Cranks
Shimano EM 600 / ERE 80 aluminum e-bike crankset (165 mm arms, 34 T chainring)
Chain
KMC E 12 S e-bike optimized chain
Bottom Bracket
Integrated (the axle assembly spins within the sealed Shimano EP 801 mid-drive motor casing)
