A smooth, comfortable, powerful ebike to take on any road.



$2,999 Sold out

Adding bigger tires and bump-taming front suspension to a powerful mid-drive motor and reliable internal gear hub, the Sirius takes our hassle-free philosophy to the trails!

Size: S/M
Color: Chalk White

Pickup currently unavailable at Vvolt PDX

  • Free shipping within the continental US
  • Free returns within 14 days
Size: S/M
Color: Chalk White

smooth out those rough roads

Sporty on all terrains, Sirius shines on potholed pavement and graveled country roads alike. Our smooth motor-assist system is ready for the rough with handling optimized for unpaved routes while the adjustable fork tames the bumps.


15-40 mi*


650 W


26 mph*


55 lbs

Sirius Key Highlights

The little design choices that make this model stand out.

The Sirius' air sprung fork tames bumps and knobby tires maintain traction when the ride gets rough.
With the Enviolo internal gear hub, just twist the shifter to find your perfect gear. There's no such thing as a "missed shift" with this step-less system that provides a wide gearing range. Unlike derailleur gears, you can shift anytime - while pedaling, coasting, or at a stop.
Stopping duties are handled by powerful hydraulic brakes which self-adjust for consistent power as the pads wear. We specify brakes with mineral oil as it lasts longer between service and is less toxic for our world.
Reviewers love the Sirius

Every component, carefully chosen

No heavy batteries, overpowered motors, or clunky profiles. The Sirius was designed to perfectly balance performance, value, and looks.

Goodbye traditional chains.

  • Lasts 3x longer than a chain!
  • No grease, no grime.
  • Doesn't stretch over time.
  • Whisper quiet and smooth as silk.
  • Maintenance free!

Hello Belts!

The battery is easily detachable from the bike with the twist of a key. Charge the battery from anywhere and leave the bike behind!

The Sirius comes with hydraulic disc brakes with 160mm rotors to ensure maximum stopping confidence on the road.

The Sirius comes fitted with cleverly thought-out mounting points for maximum versatility. Racks, fenders, baskets, boombox? No problem.

Find your perfect fit

We recommend you compare your inseam measurement, taken wearing shoes you are likely to ride in, to the stand-over height of our various models. As long as you've got around 1" of clearance over the top tube you'll likely be good to go! If you're on the cusp between sizes we generally recommend sizing up!

Rated 4.8 out of 5 stars
Based on 18 reviews
Total 5 star reviews: 15 Total 4 star reviews: 2 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
94%would recommend this product
18 reviews
  • DS
    Dave S.
    Verified Buyer
    I recommend this product
    Rated 4 out of 5 stars
    3 weeks ago
    Best Bike I've Ever Owned or Rode

    Bought primarily for recreation, I initially feared that I wouldn't get enough exercise but that is not the case since I try to conserve the precious battery to last the whole ride. Consequently, I'm able to go longer and further than with my analog bikes. (This is my first e-bike and I live in a mountain town.) The Larger size fits my 6'4", 195 lb body well. The bike is surprisingly comfortable and smooth. Unboxing and putting it together was super easy. I'm highly satisfied with all components with 2 exceptions:

    1.) 160mm brake rotors are just OK (even my comfort bike has 180mm).

    2.) Battery capacity - I have too much range anxiety while riding but maybe I just need to adjust my expectations and plans while I just have the smaller 375 Wh battery. I plan to get the 500 Wh battery as soon as it becomes available again.

    I'm not used to such a heavy bike but I'm still adjusting to the trade-off (weight vs. power). I also just read that the Enviolo hub has a ~300 mile break-in period so that adds some drag now. I've had the bike for 2 weeks and went on 2 rides on nice days:

    1.) 24 miles on gravel and single track, 1700' gain using 75% of the battery, using PAS 0 to 3.

    2.) 41 miles on paved/gravel/dirt roads, 1885' gain using 100% of the battery, using PAS 0 to 4.

  • GC
    Gregory C.
    Verified Buyer
    I recommend this product
    Rated 4 out of 5 stars
    1 month ago
    Great Bike

    Great Bike, love the belt drive, and the mid engine, but it truly need more power. The range of the battery is woefully limited. I hope you're working on a way to fix this.


  • KT
    Keith T.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago

    My 1st electric bike and it's going great. Any issues that I have had have been addressed quickly.

  • V
    I recommend this product
    Rated 5 out of 5 stars
    5 months ago
    Fantastic bike, even more fantastic customer service.

    The specs you get (internal hub, belt drive) for the price is simply unbeatable. Had a relatively minor issue with my bike, customer service was extremely quick to respond and shipped me a new part, no questions asked. 10/10 could not be more satisfied.

    V Profile picture for Vvolt
    5 months ago
    Thanks Vaughn! Glad we were able to quickly sort out the issue with your new Sirius.
  • S
    I recommend this product
    Rated 5 out of 5 stars
    6 months ago
    Lots to like about the Sirius

    Config: Sirius with Enviolo IGH. Odometer: 450 miles. Ride: I commute 20 miles roundtrip on rural coastal roads often with 20-25 mph headwinds. Four short 5 degree hills. Range: @ 20 miles. One half of my 10 mile commute consumes @ 45-50% of the battery. Riding into the headwinds consumes 65-70%. I recharge at home and the office after each 10 mile ride. Add-ons, a rear rack from Sirius, a Suntour NCX suspension seat post. A Portland design works 27.5x2.5" fender on the rear and a SKS Shockboard XL fender on the front. Rear view mirror (can save your life).

    Other ebikes I own are both Luna's. I have a KHS 3000 fat tire with 1000 Bafang BBHSD, 52v, 27AH battery (The Beast) and a Luna Stealth belt drive, Nexus 3 sp IGH with 500wh mid-drive motor and 36v 7AH battery . A quick and fun road bike.

    The Sirius is well made and fits right between The Beast and the road bike. I'm glad I went with the Enviolo IGH. It is perfect for my type of commute. I doubt I'll ever buy another chain drive. As soon as you unbox it, put the Class 3 controller on. Also, use the Xplova app to set the sensitivity to HIGH. Neither of the Luna bikes have speed controllers and they are not required in the Caribbean where I live. It is the only Con to the Sirius. I'm looking at ways to dis-able it. I will buy the 500wh battery as soon as it comes back in stock. Suggestion to Vvolt, offer even larger batteries. I imagine plenty of folks will buy the upgrade.

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Components & Specs

Full component specifications for our fellow nerds. Find the full component specsheet here.

Enviolo Hub

Way better than derailleur gearing, the Enviolo TK continuously variable transmission hub features a 380% range and never needs adjustment.

MPF 6C Motor

We're fans of the strong and silent type, so we use an MPF mid-drive motor with all-metal gearing in an oil lube bath. It has 350-watt nominal power and 650-watt peak output.

Mid-Motor Battery

Our 375Wh standard battery provides 15 to 40 miles of range depending on terrain, assist level, and other factors. An upgraded 500Wh battery is also available for increased range and power. All of our batteries are removable and can be charged on or off the bike.

Class 1 / Class 3 Controller

Our mid-motor bikes can be configured with a Class 1 (motor assistance up to 20 mph) or a Class 3 (motor assistance up to 26 mph) controller.

Suspension Fork

The Sirius features air-sprung fork with 100mm of tunable travel and a compression/lockout adjuster. 1 1/8" straight steerer and 15 x 100mm thru-axle.


Hydraulic brakes paired with 160mm rotors provide ample stopping power.

Gates Belt Drive

Carbon reinforced belts from Gates® last longer than chains, operate quietly, and don't require greasing. No more unintentional chainring tattoos!


27.5" x 2.1" tires with knobby tread to take on some mild off-road riding.