Highlights based on this e-bike’s specs, comparisons and practical strengths.
100
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 29-inch or mullet wheel setup should help stability and control on descents.
The mountain bike design should be better suited to controlled descending.
100
Excellent off-road capability
The mountain bike design should be well suited to off-road riding.
The mountain bike design should be well suited to off-road riding.
Front and rear suspension should improve control and comfort off-road.
Hydraulic disc brakes should help with control on loose or uneven terrain.
Torque is strong compared with similar e-bikes, which should help on loose or uneven climbs.
The 29-inch wheel size should help rollover and stability on rougher terrain.
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.
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.
94
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.
With stronger motor output, clear controls and ride modes become more useful.
92
Excellent hill climbing support
Torque is above average for this type of e-bike.
Torque is above average for this type of e-bike.
Power-to-weight is above average.
Motor power is high 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 24.69.
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
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.
74
Good power-to-weight ratio
Power-to-weight is above average for this type of e-bike.
Power-to-weight is above average for this type of e-bike.
Motor power is high for this type of e-bike.
The calculated power-to-weight score is 24.69.
Overview
The Polygon SISKIU TE WITH BOSCH 2025 is a mountain bike built for trail riding and off-road adventures, offering strong motor support with 600W power and 85Nm of torque to tackle hills with confidence. Its front and rear suspension, combined with hydraulic disc brakes, provide good comfort and braking control on rough terrain, making it a solid choice for trail-focused riders. The removable battery adds convenience for charging and storage, though the charging time is notably slow, and the bike's range may limit longer rides. At 24.3kg, it's average for its category, which might make it a bit heavier to lift, but overall it delivers a capable and well-rounded riding experience for mountain biking enthusiasts.
Best For
✓
This mountain e-bike should suit riders who prioritize off-road performance, trail control and climbing support. Its strong motor power and torque, combined with front and rear suspension, make it well-suited for rough terrain and confident trail riding. The removable battery adds flexibility for charging away from the bike, which is especially useful for longer rides or multi-day adventures. Riders who value responsive assistance that matches their effort and want a reliable e-bike for varied off-road conditions are likely to appreciate this model.
Who Should Avoid It
×
Riders planning long off-road rides or carrying heavier loads may want to compare alternatives, as the bike's range is limited compared with similar e-bikes and its payload capacity is modest for a mountain e-bike. The charging time is also longer than average for this type of e-bike, which could be a drawback for riders who need quick battery turnaround. However, the bike still offers strong hill climbing support and excellent trail control, making it a solid choice for riders prioritising performance on technical terrain.
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.
24
Harder to lift
Poor
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 24.3 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.
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 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.
29
Low battery efficiency
Poor
Battery efficiency appears average for this type of e-bike.
Battery efficiency appears average for this type of e-bike.
The calculated range per battery unit is 70.4.
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.
19
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.
150W more power46 miles more range3 Ah more battery3 kg lighterSame gears
Potential limitations
Areas where this e-bike may be less strong based on its specs and comparisons.
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 low compared with similar e-bikes, which may limit commuting flexibility.
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.
Front and rear suspension can add weight and complexity for normal commuting.
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 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.
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.
19
Limited family utility practicality
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.
24
Harder to lift
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 24.3 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.
28
Limited longer-ride suitability
Range is low compared with similar e-bikes, which may limit longer rides.
Range is low compared with similar e-bikes, which may limit longer rides.
Battery capacity is average for this type of e-bike.
Battery efficiency appears broadly average.
The removable battery can make charging easier during longer days or multi-stop rides.
Charging time is longer than average, which may be less convenient for back-to-back longer rides.
The display or control unit should make it easier to monitor assistance and battery use on longer rides.
29
Low battery efficiency
Battery efficiency appears average for this type of e-bike.
Battery efficiency appears average for this type of e-bike.
The calculated range per battery unit is 70.4.
E-system & battery comparison
Motor Power
600 watts
▲ 160 W above average
Motor Torque
85 Nm
▲ 6.5 Nm above average
Power-to-weight
24.69 W/kg
▲ 4.3 W/kg above average
Battery Capacity
625 Wh
▼ 5.9 Wh below average
Claimed Max Range
44 miles
▼ 17 miles below average
Charge Time
5h 40m
▲ 25 mins slower than average
Sensor Type
Torque and Cadence Sensor
Removable Battery
Yes
Motor Name
Bosch Performance Line CX
This mountain e-bike features a strong motor output that should feel lively and capable on trails, with good support for climbing and low-speed technical riding. Next to similar e-bikes, the motor's power and torque should offer a responsive and natural feel, especially when paired with torque and cadence sensing for smooth assistance. The motor should provide solid climbing support and help maintain momentum on rough terrain, while the power-to-weight balance likely makes the assistance feel more dynamic in real-world riding. The sensor setup should allow for predictable and controllable assistance, adapting to rider input and terrain conditions. Riders looking for a capable mountain e-bike with strong trail performance and responsive power delivery may 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 bike is well-suited for off-road trails, with strong motor support and suspension to handle rough terrain. However, its range of 44 miles may limit longer rides, and the charging time is slower than average, which could be a consideration for frequent off-road use.
How does the motor perform when climbing steep trails?
The motor should provide strong support when climbing steep trails, thanks to its 85 Nm of torque, which is above average for similar e-bikes. This should help you maintain control and momentum on challenging terrain. However, the battery efficiency is average for this type of e-bike, so you may need to plan for more frequent charging on long climbs or extended rides.
Does the bike handle rough terrain comfortably?
This mountain e-bike is designed for rough terrain, with front and rear suspension that should significantly improve comfort on uneven surfaces. The 29-inch tires and hydraulic disc brakes also contribute to stable and confident handling on trails. While it's not optimized for daily commuting, it should feel well suited to trail riding and off-road adventures.
How long does the battery last on a single charge?
The battery should last around 44 miles on a single charge, which is slightly below average for similar mountain e-bikes. This range should be adequate for most trail rides, but you may need to plan for additional charging if you're tackling longer off-road routes. The battery is removable, making it easier to charge at home or on the go, though it does take about 5.7 hours to fully charge, which is a bit slower than some competitors.
Is the battery easy to remove and charge separately?
Yes, the battery is removable, which makes it easy to charge separately from the bike. This is a useful feature for riders who need to recharge the battery without having to carry the whole bike. However, the charging time is longer than average for similar e-bikes, so you may need to plan your rides accordingly.
How does the bike's weight affect its portability and handling?
The bike's weight impacts how easily it can be carried, especially when dismounting or lifting it onto a vehicle. At 15.6 kg, it's reasonably light for a mountain e-bike, which helps with portability. However, the weight also contributes to stability and control on rough terrain, making it feel more grounded during off-road rides.
Is this bike good value for its price compared to similar models?
This bike offers good value for its price compared to similar models, especially considering its strong motor power and torque, which are above average for mountain e-bikes. While its range is slightly below average, the price is favourable, and the removable battery adds practicality for charging and storage. The hydraulic disc brakes and mountain bike design also make it well-suited for off-road use, which is a key consideration for this type of e-bike.
What are the main limitations or trade-offs of this bike?
The main limitations of this bike include a relatively slow charging time compared to similar e-bikes, which may be inconvenient if you need to recharge frequently. It also has limited storage practicality since the frame does not fold, so storage will depend on its size and weight. Additionally, while the weight is average for a mountain e-bike, it may make the bike slightly harder to lift and carry, especially when fully loaded.
eBike Overview
eBike Type: Mountain Bike
The style of riding intended for this bike
Released:
2025
The bike was released 1 years ago
Screen
Bosch top tube integrated display with Bosch wireless remote
Lights Included
No
Weight (inc battery): 24.3 kg
The website average for electric bikes is
22.88 kg.
This electric bike is 1.41 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
Polygon MT 9 Tubeless Ready rims (30 mm inner width) laced to DT Swiss 370 Classic hubs (Boost spacing: 15 x 110 mm front / 12 x 148 mm rear)
