A full suspension electric mountain bike for exploring more trails and getting more out of every ride.
The Polygon Siskiu T6E is an electric trail bike for riders who want a helping hand on the climbs and a capable bike for the ride back down. Its Shimano EP600 motor, 504 Wh battery and full suspension aluminium frame make it a practical choice for local trails, longer rides and getting a few more laps in after work.
With 29-inch wheels, SRAM Code R brakes and an adjustable dropper post, the T6E is equipped for riders who want to build confidence and explore further on mixed trail terrain.
Shimano EP600 Motor
The Shimano EP600 mid-drive motor provides up to 85 Nm of torque, giving you assistance when climbing steep trails, riding into a headwind or heading out for a longer day. Its support is delivered as you pedal, helping you keep the ride moving while still choosing how much effort to put in.
The supplier lists this bike as the 32 km/h assistance version. Motor assistance reduces as the bike approaches its configured assistance limit; you can still ride faster under your own power or on a descent.
504 Wh Integrated Battery
A Shimano 504 Wh battery sits inside the downtube to give the bike a tidy appearance and a low, central battery position.
How far you can ride on a charge depends on the assistance mode, terrain, rider weight, tyre pressure, temperature and how much climbing is involved. Riders planning long days with lots of steep climbing should consider those factors rather than rely on a single quoted range.
Full Suspension Trail Frame
The ALX aluminium frame uses a trail-focused suspension design to help the wheels follow uneven ground. Paired with the SR Suntour Zeron Boost fork and Edge Plus rear shock, it is designed to provide control and comfort over roots, rocks and rougher sections of trail.
We can help set up the suspension for your weight and riding preferences as a starting point when you collect the bike.
Stable 29-Inch Wheels
The Siskiu T6E is supplied with 29-inch wheels and 2.4-inch tyres. The larger wheels roll well over uneven ground and help maintain momentum on flowing trails, while the wider tyres provide useful volume for grip and comfort.
Polygon lists the Entity XL3 wheels as tubeless-ready, with tubeless tape on the rims. The supplier does not identify whether the fitted tyres are tubeless-ready, so check the complete wheel and tyre setup before converting. Valves, sealant and fitting may be required.
Shimano Gearing and SRAM Code R Brakes
A Shimano 1 × 11-speed drivetrain provides a straightforward range of gears for trail riding. The single front chainring keeps shifting simple, while the motor helps take the edge off longer climbs.
SRAM Code R hydraulic disc brakes provide controlled stopping power when the trail points downhill. Their four-piston design is suited to riders who want a substantial brake for an electric mountain bike.
Dropper Post for Trail Riding
The TranzX dropper post lets you lower the saddle from the handlebar before a descent, giving you more room to move around the bike. Raise it again for climbing without stopping to adjust the saddle by hand.
Polygon lists 150 mm of dropper travel on sizes S and M, and 170 mm on sizes L and XL. The best setup still depends on your leg length and the amount of post that can be inserted into the frame.
Key Features
- Polygon ALX aluminium full suspension trail frame
- Shimano EP600 mid-drive motor with up to 85 Nm of torque
- Supplier-listed assistance up to 32 km/h
- Shimano 504 Wh integrated downtube battery
- SR Suntour Zeron Boost suspension fork
- SR Suntour Edge Plus rear shock
- Shimano 1 × 11-speed drivetrain
- SRAM Code R four-piston hydraulic disc brakes
- 29-inch wheels and 2.4-inch tyres
- Entity XL3 tubeless-ready wheelset
- TranzX dropper post
- Polygon Expert 780 mm handlebar
- Black/Grey finish
Who Is It For?
- Electric mountain biking and recreational trail riding
- Riders who want assistance on longer or steeper climbs
- Exploring local mountain bike trails and forest roads
- Riders stepping up from a hardtail or non-assisted bike
- Riders who want to fit more trail laps into their day
- Mixed rides with climbing, flowing singletrack and rougher sections
Trail difficulty, permitted e-bike access and rider experience should always be considered. Check the rules for the trails you plan to ride before setting out.
Our Thoughts
The Siskiu T6E is a good option for someone who wants a full suspension electric mountain bike for exploring local trails without jumping straight to a top-end build. The EP600 motor provides plenty of assistance for climbing, while the dropper post and Code R brakes are useful inclusions once the trail points downhill.
The 504 Wh battery is worth considering alongside how and where you ride. It can suit regular local rides, but riders planning long days with a lot of climbing or regular high-assistance use may prefer a bike with a larger battery.
The 29-inch wheels and trail geometry make sense for riders who enjoy a mix of climbing and descending. As always, a comfortable fit and a good suspension setup matter more than any single number on the specification sheet.