Can’t choose between the Polygon Collosus NE and the Siskiu TE E-MTB Series? You’re not alone. These two standout electric mountain bikes (E-MTBs) are made for serious adventures, but they serve different purposes.
The Collosus NE is a powerhouse built for enduro riders charging down technical descents, while the Siskiu TE offers nimble handling for long, mixed-terrain rides.
So which is better for your riding style? Let’s dive into their differences—geometry, suspension, electric motors, and more—to help you decide the perfect match.
What Sets Collosus NE and Siskiu TE Apart?
At a glance, both the Polygon Collosus NE and Siskiu TE look like seriously capable electric mountain bikes, and fair dinkum, they are! However, dig a little deeper, and you’ll find these two machines are designed for quite different riding purposes.
The Collosus NE is Polygon’s top-tier enduro E-MTB, designed for rugged Australian terrain: think rocky descents, bike parks, and high-speed gravity runs. Its long-travel suspension and relaxed geometry are built to keep you planted.
The Siskiu TE, on the other hand, suits trail riders who want a balanced bike for climbing and descending. It’s lighter, more agile, and perfect for all-day riding on everything from flowy singletrack to technical features.
In short: Collosus NE is gravity-fuelled and aggressive; Siskiu TE is versatile and playful.
Geometry & Handling: Ride Feel Matters
Geometry defines how a bike rides. Both the Collosus NE and Siskiu TE feature modern E-MTB silhouettes but are tuned for different trail personalities.
The Collosus NE has a slacker head angle, longer reach, and lower bottom bracket—ideal for high-speed descents. It feels ultra-stable on steep, loose, and chunky trails.
The Siskiu TE comes with a steeper head angle and more compact reach, making it feel more responsive and playful—great for Aussie switchbacks and rolling terrain.
Here’s a look at how their geometry stacks up (based on 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 |
So, what does this mean when you’re out shredding? The Collosus NE feels incredibly stable and composed on steep, chunky lines – it practically begs you to let go of the brakes.
The Siskiu TE feels more lively and versatile, perfect for tight switchbacks or undulating terrain where you want to flick the bike around. Neither is “better”; it truly comes down to your preferred riding style and the kind of trails you usually ride.
Suspension & Trail Performance: Travel That Matches the Terrain
When picking an electric mountain bike, suspension isn’t just about comfort; it’s about control, capability, and confidence. Both the Collosus NE and Siskiu TE come with top-notch suspension setups, but they’re tuned for very different trail personalities.
Collosus NE
This bike packs 170mm front / 160mm rear travel with a FOX 38 Performance fork and FOX Float X Performance shock—perfect for bombing down Black Diamond trails.
Siskiu TE
This bike delivers 150mm front / 140mm rear travel via a FOX 36 Rhythm fork and FOX Float DPS shock, offering trail-friendly support with climbing efficiency.
Suspension travel isn’t just about the numbers; it’s about how the bike handles when the trail gets properly rowdy or when you want to keep things efficient. The NE is built to absorb big hits at speed, while the TE is built for versatility and all-day comfort.
Motor & Battery: Bosch vs Shimano
Collosus NE: Bosch Brute with Big Range
The Collosus NE runs the powerful Bosch Performance Line CX motor paired with a massive 750Wh PowerTube battery. It’s built for high-output riding, giving you grunty support on steep climbs and sustaining power for long enduro loops.
The Bosch system is punchy and direct, and that generous battery lets you ride harder, longer – no worries.
Siskiu TE: Shimano Smooth and Efficient
The Siskiu TE uses the Shimano EP801 motor and a 630Wh battery. While it delivers the same torque as the Bosch unit, the Shimano system often feels more natural and adapts beautifully to the trail.
It’s also a bit lighter overall, which adds to the TE’s agile, nimble vibe, making it a fantastic electric trail bike
So Which System Wins?
- Bosch (Collosus NE): More battery equals more range, especially when you’re hitting those turbo modes. Great for big enduro days out in the hills.
- Shimano (Siskiu TE): Lighter setup, more intuitive and natural trail feel. Better for those who prefer a more organic ride experience, even with assistance.
Both bikes push 85 Nm of torque, so raw power isn’t the key difference here; it’s all about how that power feels and how far it’ll take you on your next adventure.
Groupset & Components: Ready to Roll
While both bikes feature the high-performance Shimano XT 12-speed drivetrain, their componentry is tuned to different riding demands
Collosus NE comes with Shimano XT 4-piston hydraulic brakes for top-tier stopping power, plus a reinforced build for aggressive downhill sessions. Every component is designed for heavy-duty enduro performance.
Siskiu TE uses Shimano MT420 4-piston brakes—a solid trail-focused choice offering control and reliability. The lighter FOX 36 Rhythm fork, Float DPS shock, and 2.6″ tyres contribute to a responsive, easy-handling setup ideal for all-day rides.
The NE is the bike you want when the trails get gnarly. The TE keeps things efficient, agile, and ready for mixed trail adventures.
Who Should Ride What?
Ride the Collosus NE if:
- You live for steep, technical descents, enduro lines, or big days at the bike park.
- You want an electric mountain bike that feels super planted and confident when ripping at high speed.
- You regularly ride terrain where long-travel suspension and powerful brakes are an absolute must.
- You’re okay with a slightly heavier setup for maximum stability and range on demanding rides.
This is the bike for riders who push their limits, enduro fanatics, gravity hounds, and weekend warriors looking for a full-send rig.
Ride the Siskiu TE if:
- You ride a mix of trails, from flowy singletrack to moderate climbs and fun descents.
- You prefer something lighter and more agile for everyday fun out on the trails.
- You still want plenty of power and range, but in a more versatile and efficient package.
- You love big days in the saddle but don’t necessarily need to conquer the most extreme enduro lines.
This one’s for the all-rounder, riders who explore different types of trails and want a reliable electric mountain bike that keeps things fun without overkill. It’s a top choice for an e-MTB for Australian trails that can do a bit of everything.
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Final Thoughts: Which One’s for You?
Both the Collosus NE and Siskiu TE are high-performance electric mountain bikes that can handle tough Australian conditions.
- Collosus NE is the gravity rider’s dream: big travel, big battery, big thrills.
- Siskiu TE is the everyday trail ripper: agile, comfortable, and built for variety.
Whichever you choose, you’re getting a top-quality E-MTB from Polygon that’s ready to rip across our epic trail networks.
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