A capable full suspension electric mountain bike for longer rides and more trail laps.
The Polygon Siskiu T7E is built for riders who want a helping hand on the climbs and a capable bike for the ride back down. Its Shimano EP801 motor, 630 Wh battery and full suspension aluminium frame make it a practical choice for local trails, weekend adventures and getting a few more laps in after work.
With a 150 mm SR Suntour fork, SRAM Code R brakes and wide Schwalbe tyres, the T7E is equipped for riders looking to explore further and build confidence on a variety of trail terrain.
Shimano EP801 Motor
The Shimano EP801 mid-drive motor provides up to 85 Nm of torque, giving you assistance when climbing steep trails 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. Assistance reduces as the bike approaches its configured limit; you can still ride faster under your own power or on a descent.
630 Wh Integrated Battery
A Shimano 630 Wh battery sits inside the downtube for a tidy appearance and a low, central battery position. It gives the T7E more battery capacity than the 504 Wh Siskiu T6E, which may be useful for riders planning longer rides or more climbing.
How far you can ride on a charge depends on assistance mode, terrain, rider weight, tyre pressure, temperature and how much climbing is involved. It is worth considering where and how you ride rather than relying on a single quoted range.
Full Suspension for Trail Riding
The ALX aluminium frame is paired with an SR Suntour Aion 35 Boost fork providing 150 mm of front travel. An SR Suntour Triair2 rear shock helps the rear wheel follow uneven ground through roots, rocks and rougher sections.
The suspension can be adjusted to suit your weight and riding preferences. We can help set it up as a starting point when you collect the bike.
Shimano 12-Speed Gearing
The T7E combines a Shimano SLX shifter and rear derailleur with a 10–51T Deore cassette. The wide-range 1 × 12-speed setup gives you useful options for steep climbs and rolling trails without a front derailleur to manage.
A 34T front chainring keeps the drivetrain straightforward, while the motor provides a helping hand when the gradient starts to bite.
SRAM Code R Brakes
SRAM Code R four-piston hydraulic disc brakes provide controlled stopping power when the trail points downhill. The supplied specification lists 203 mm Shimano rotors front and rear, providing plenty of braking leverage for an electric mountain bike.
Wide Schwalbe Trail Tyres
Schwalbe Hans Dampf 29 × 2.6-inch tyres provide plenty of volume for grip and comfort on roots, rocks and loose trail surfaces. The supplied Super Trail casing and Addix SpeedGrip compound are suited to riders who want a capable trail tyre rather than a lightly built cross-country option.
The Entity XL3 wheels and Schwalbe TLE tyres are listed as tubeless-ready, with tubeless tape on the rims. Valves, sealant and final setup may still be required; ask us about the options when ordering.
Dropper Post for Descending
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 EP801 mid-drive motor with up to 85 Nm of torque
- Supplier-listed assistance up to 32 km/h
- Shimano 630 Wh integrated downtube battery
- SR Suntour Aion 35 Boost fork with 150 mm travel
- SR Suntour Triair2 3CR rear shock
- Shimano SLX/Deore 1 × 12-speed drivetrain
- Wide-range 10–51T cassette
- SRAM Code R four-piston hydraulic disc brakes
- 203 mm front and rear brake rotors
- Entity XL3 tubeless-ready wheels
- Schwalbe Hans Dampf 29 × 2.6-inch tyres
- TranzX dropper post
- Entity Expert 780 mm handlebar
- Brown/Olive finish
Who Is It For?
- Electric mountain biking and recreational trail riding
- Riders who want assistance on longer or steeper climbs
- Flowing singletrack, roots and rocky trails
- Riders looking to fit more trail laps into their day
- Weekend adventures with a mix of climbing and descending
- Riders wanting more battery capacity than the Siskiu T6E
- Riders who value wide tyres and strong hydraulic brakes
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 T7E is a good option if you want an electric trail bike with a bit more equipment and battery capacity for bigger rides. The EP801 motor helps on the climbs, while the Aion fork, wide Hans Dampf tyres and Code R brakes make sense when the track gets rougher.
Compared with the T6E, the larger battery, 12-speed drivetrain and specified 150 mm fork make the T7E worth considering if you plan to spend more time on mountain bike trails. The 2.6-inch tyres also give you plenty of volume to work with when finding the right pressure for grip and comfort.
As with any e-bike, range depends heavily on how much assistance you use and how much climbing you do. Come in and have a chat about the rides you have in mind and we can help you decide if it is the right fit.