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


$2,999 $2,599 Sale

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!

Every Sirius now includes both 20mph "Class 1" and 26mph "Warp Core Upgrade" controllers. 

Update: Sirius inventory is extremely limited, remaining units are on closeout while stock lasts. Add to cart to see your price!
*note that current special price replaces the May accessory discount promotion

2 in stock
Size: L/XL
Color: Chalk White

Get $100 off local pickup

Usually ready in 5+ days

  • Free shipping within the continental US
  • Free returns within 14 days
  • 3 year warranty
  • Complementary pre-delivery tune up ($160 value)
Size: L/XL
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 4.9 out of 5 stars
Based on 16 reviews
Total 5 star reviews: 15 Total 4 star reviews: 0 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
94%would recommend this product
16 reviews
  • KT
    Keith T.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    12 seconds 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
    4 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
    4 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
    5 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.

  • R
    I recommend this product
    Rated 5 out of 5 stars
    11 months ago
    Practically Perfect

    If I were to build a perfect ebike it would have the best, proven industry components like a German-made motor and an LG battery. I would go with the Enviolo and carbon fiber drive system and never have to bother with greasy chains and touchy derailleurs ever again. I would opt for air shocks over springs, ride it on Kenda tires and keep it simple stupid with a controller that does not require a degree in computer programming to operate. I would have the frame built and components assembled in Taiwan where most of the worlds bikes are made, where they know what they’re doing and opt for sizing and weight of the components to fit the geometry of the bike, not too big and not too small. Finally, I would offer an unheard-of 3 year warranty backed by exemplary and personalized customer service and sell it for way less than any other eBike in its class. It was hard to pull the trigger on a bike I’ve never test ridden. I have ridden countless eBikes and, after a single ride on my new Serius, have no regrets buying 2 of these.

  • S
    Rated 3 out of 5 stars
    12 months ago
    Not a real review

    I don't have one (yet) but my neighbor does and I've ridden it quite a bit. He likes to ride my Honda Ruckus, so we do a lot of lending back and forth.

    It's a great e-bike with lots of positive things to say about it. I really do like it a lot. Love the mid drive motor, the Enviolo, the belt drive... But there is one downside that's holding me back from getting it and that's the very anemic battery it ships with.

    We live in a fairly hilly area and it takes a lot of nursing to get 15 to 20 miles out of a full charge.

    I see it has a newer battery available but it's still only 36v 14ah. In today's market I would think a 48v 14ah would be the absolute bare minimum, at least for me. Even then, I doubt I'll get one less that 48v 20ah.

    So I'll just enjoying riding my neighbors and hope a not to distant future model has a more capable battery.

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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.