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Summary of Reviews
We have read all expert and user reviews on the Vvolt Sirius. In summary, this is what cyclists think.
19 reasons to buy
- A 250W MPF mid-drive motor exudes 500W of peak power and 80Nm of torque.
- A torque sensor intuitively moderates pedal-assist to ensure smooth acceleration.
- The Gates CDX belt drive is greaseless, quiet and low-maintenance.
- An Enviolo TR internal planetary hub offers 380% of stepless gear range.
- The Sirius is shod with mighty hydraulic disc brakes, front and back.
- With an internally-housed battery, the Sirius sports a neat and clean aesthetic.
- The Sirius’s flowing framework is a callback to classic cruisers and klunkers.
- Vvolt backs the Sirius with a 3-year warranty against manufacturers' defects.
- The Sirius’s battery is lockable and removable for security or off-bike charging.
- With a 100mm suspension fork and room for knobby tires, the Sirius is versatile.
- 27.5” wheels work well in urban and off-road environments.
- Moderately upright geometry works well for city and gravel riding.
- Acer’s Explova display and control unit is simple, clear and easy to read.
- USB lights come included. The headlight connects to the Sirius’s display unit.
- Kenda Kwick Seven.5 tires feature a mixed-tread that suits pavement and dirt.
- With an internal stepless hub and belt drive, the Sirius operates quietly.
- ‘Walk Mode’ helps you to walk the Sirius up steep ramps and driveways.
- The Enviolo TR hub allows riders to change gears when stopped, without pedaling.
- An optional upgrade unit boosts riders’ maximum assist speed to 28mph.
2 reasons not to buy
- Due to its quality parts selection, the Sirius is not cheap.
- This e-bike’s 375Wh battery capacity is on the lower end of the range.
Bottom lineVvolt’s Sirius is a Class 1 e-bike that provides riders with pedal-assisted support up to 20mph. An optional ‘Warp Core’ upgrade lifts this to 28mph. The Sirius runs a 250W mid-drive motor that outputs 500W of peak power and 80Nm of torque. A Gates CDX belt-drive and internal, stepless, planetary Enviolo hub combine to produce a quiet, low-maintenance and durable drivetrain. High-quality components are specced throughout. This is not a gnarly trail-riding mountain bike but it is well-suited to gravel riding, dirt roads and crunchy trails. At 375Wh, the battery is on the lower end of capacity but still offers up to 40 miles of range. A stylish and well thought-out e-bike that’s priced accordingly.
Expert Reviews92/100 based on 1 rated expert review
Vvolt Sirius Electric Bike Review
All-in-all, the Vvolt Sirius is a high-quality pedal-assist Class 1 e-bike that can be upgraded to a Class 3 e-bike if you need extra speed… Very highly recommended.
Cool New Mid Drive, Belt Drive E-bike
Despite the battery, I’m a big fan. I really like the look. I love that it has a mid-drive. I love that it has a belt drive. I love that it has hydraulic disc brakes.
Vvolt Sirius E-bike Full Review: Mid-Drive, Belt Drive With Internal Geared Hub!
An electric bike like this is much more conducive to pedaling a little bit more… I’m a huge fan of belt drive e-bikes paired with an Enviolo internally geared hub… the biggest selling point is the low maintenance… The Vvolt Sirius is very close to my dream e-bike.
Vvolt Sirius Review: This Low-Maintenance E-bike Is Like Riding on a Cloud
There’s a whole lot to like here. While [this price] is no small change, the Sirius feels like it justifies its price. It’s a polished, no-nonsense e-bike with some of the smoothest pedal-assist I’ve tested in a remarkably comfortable design.