Choosing the right electric mountain bike (e-MTB) can feel like a major decision, especially when comparing two top-tier options.
If you’re torn between the Polygon Collosus NE and the Siskiu TE Series, you’re in good company. Both are standout electric mountain bikes engineered for thrilling adventures, but they cater to distinct riding styles and terrain preferences.
The Collosus NE is a full-send machine for enduro riders who love steep descents and technical terrain. The Siskiu TE, on the other hand, is a trail-friendly E-MTB that’s lighter, more agile, and ideal for long rides on mixed terrain.
So, which one’s right for you? Let’s compare specs, geometry, suspension, and more.
Quick Comparison: What Sets the Collosus NE and Siskiu TE Apart?
At first glance, both bikes look built to rip. But the details matter:
- Collosus NE: Long-travel enduro E-MTB built for aggressive descents, rocky drops, and fast, rowdy trails. Ideal for downhill junkies.
- Siskiu TE: Versatile trail E-MTB with balanced geometry and lighter components. Perfect for all-day epics, switchbacks, and climbing.
While both pack electric power and trail toughness, they’re tuned for different experiences.So, while both are powerful e-MTB machines, they’re finely tuned for different personalities on the trail.
The Collosus NE leans heavily into gravity-fed speed and unwavering confidence at high speeds, making it a true full-suspension e-bike designed for aggressive riders. In contrast, the Siskiu TE serves as your versatile, go-anywhere trail e-bike, perfect for exploring a wider range of terrain.
Geometry & Handling: Stability vs. Agility
A bike’s geometry fundamentally dictates its ride feel, influencing your control, comfort, and confidence across different terrains.
While both models showcase modern e-MTB silhouettes, the Collosus NE and Siskiu TE are precisely tuned for distinct on-trail experiences.
Geometry affects how your bike feels and performs on the trail. Here’s a side-by-side comparison (Size M):
| Geometry Metric | Collosus NE (M) | Siskiu TE (M) |
| Head Angle | 64.5° | 65° |
| Seat Tube Angle | 78° | 71.7° |
| Reach | 470 mm | 465 mm |
| Stack | 631 mm | 618 mm |
| Chainstay Length | 435 mm | 445 mm |
| Wheelbase | 1235 mm | 1226 mm |
- Collosus NE E-MTB: Feels planted, stable, and confident—perfect for steep descents.
- Siskiu TE E-MTB: More nimble and poppy—great for tight turns, flowy trails, and playful riding.
Suspension Setup: Big Travel vs. Trail Efficiency
When selecting an electric mountain bike, suspension isn’t just about cushioning your ride; it’s fundamental to control, capability, and confidence.
Both the Collosus NE and Siskiu TE come equipped with high-quality suspension systems, but they are expertly tuned for very different trail personalities.
Collosus NE Suspension:
- 170mm front / 160mm rear travel
- FOX 38 Performance fork + FOX Float X Performance shock
- Soaks up rocks, drops, and high-speed hits
Siskiu TE Suspension:
- 150mm front / 140mm rear travel
- FOX 36 Rhythm fork + FOX Float DPS Performance shock
- More efficient on climbs, still capable on techy sections
This generous suspension travel makes a monumental difference when you’re tackling steep, high-speed trails.
The suspension keeps the bike composed and controlled, whether you’re plowing through rock gardens, sticking drops, or navigating loose, off-camber corners. For aggressive riders who truly push their limits on descents, the Collosus NE ensures a smooth and controlled ride.
Motor & Battery: Bosch Power vs. Shimano Control
Both the Polygon Collosus NE and Siskiu TE pack serious power, each boasting motors that deliver 85 Nm of torque. However, the overall ride feel and battery range differ slightly due to the specific e-bike systems they employ.
Collosus NE Motor & Battery:
- Bosch Performance Line CX motor
- 750Wh battery = more range
- Ideal for extended enduro runs and steep climbs
Siskiu TE Motor & Battery:
- Shimano EP801 motor
- 630Wh battery = lighter overall feel
- Smooth, adaptive power for all-around trail use
Which System Comes Out on Top?
- Bosch (Collosus NE): Offers a larger battery for more range, particularly when utilizing higher-power modes. It’s an excellent choice for extended enduro sessions or big mountain adventures.
- Shimano (Siskiu TE): Provides a lighter setup and a more natural, subtle trail feel. This system is favored by riders who prefer a more intuitive and integrated ride experience.
Since both bikes deliver 85 Nm of torque, raw power output isn’t the differentiating factor. The choice hinges on how that power is delivered and how far it will take you on your rides.
Groupset & Trail-Ready Features: Shifting, Braking, and Durability
Both the Polygon Collosus NE and Siskiu TE are equipped with high-performance components, though their specific configurations are geared toward slightly different trail expectations. Let’s break down their key specs.
Collosus NE Groupset:
- Shimano XT 12-speed drivetrain (10–51T)
- Shimano XT 4-piston brakes
- Built to handle aggressive trails and fast descents
Siskiu TE Groupset:
- Shimano XT 12-speed drivetrain (same wide-range gearing)
- Shimano MT420 4-piston brakes (trail-friendly and effective)
- Lighter wheels and 2.6″ tires for responsive handling
Both bikes are fully ready for the demands of e-MTB riding. However, the Collosus NE leans more heavily on gravity-specific technology and robust components, while the Siskiu TE balances performance with all-day rideability and agility.
Which E-MTB Is Right For You? Collosus NE vs. Siskiu TE
Choosing between the Polygon Collosus NE and Siskiu TE ultimately boils down to your preferred riding style, the terrain you typically ride, and the type of electric mountain bike experience you seek.
Choose the Collosus NE if:
- You live for steep, technical descents, challenging enduro lines, or frequent bike park sessions.
- You demand a bike that remains incredibly stable and confident at high speeds.
- You regularly ride terrain where long-travel suspension and powerful brakes are non-negotiable.
- You’re comfortable with a slightly heavier setup in exchange for maximum stability, composure, and battery range for demanding rides.
This is the bike for riders who constantly push their limits—enduro junkies, gravity specialists, and weekend warriors looking for a full-send setup. It’s a top contender for the best e-MTB for aggressive riding.
Choose the Siskiu TE if:
- You enjoy riding a mix of trails, from flowing singletrack to moderate climbs and fun descents.
- You prefer a bike that feels lighter, more agile, and responsive for everyday fun on the trails.
- You still want ample power and range, but in a more versatile and efficient package.
- You love big days in the saddle and exploring various terrains, but don’t necessarily need to conquer the gnarliest enduro lines.
This model is ideal for the all-around rider who explores different types of trails and desires a reliable electric mountain bike that offers a fun and balanced experience without over-spec’ing for extreme conditions.
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Final Verdict: Which E-MTB Is Best for You?
Both bikes are top-tier Polygon E-MTBs, built to take on serious trails. But the right one depends on your riding style:
- Collosus NE is for the senders, enduro racers, and downhill-focused riders.
- Siskiu TE is for all-around mountain bikers who want power, fun, and versatility.
No matter which you choose, you’re getting a capable electric mountain bike that’s ready for big rides, steep climbs, and fast descents.
Explore both models in the Polygon lineup and get ready to power your next trail adventure.
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