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Your trusty companion in the backcountry

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!

  • Lightweight Alloy Frame
  • Air sprung suspension fork with 100mm of travel
  • 250w (500w peak power!) MPF mid-drive with 80Nm of torque
  • 375wh Celxpert battery with LG cells - 5.5 hours to full charge
  • Up to 60 miles on single charge!
  • 54-56 pounds depending on size
  • Torque sensor automatically adjusts assistance based on how hard you pedal
  • Enviolo TR rear hub with stepless shifting and 380% gear range
  • Gates CDX Belt Drive, Cog and Sprocket
  • Hydraulic Disc brakes with 160mm rotors
  • Clearance for most 2.4" tires (particularly aggressive tread could interfere with the frame)
  • Front and rear rechargeable lights included
  • Onboard computer
    • 4 levels of assistance plus walk mode
    • Bluetooth-compatible for pairing with phone app
    • USB outlet taps into battery to charge your devices on the go
    • Standard Class 1 Controller offers motor support to 20mph
  • *Specifications subject to change without notice

One of the benefits of an ebike is that you don’t need to focus on getting the exact-right size to maximize pedaling efficiency - the bike is plenty efficient for you! We’ve chosen two sizes for each model that should comfortably fit most people. That said, you still want to choose the one that’s best for you! A good rule of thumb is to compare your inseam measurement (taken wearing shoes you are likely to ride in) to the standover height of our various models.

Vvolt Proxima ebike Sizing Chart

We're here to make it easy to get exactly what you need. Get in touch!

Monday - Friday, 8am - 4pm PT

We plan for Alpha orders to begin shipping August 15 (Proxima/Sirius Sept 15)

Standard FedEx ground shipping is free within the contiguous US and your bike will arrive within 5 business days of shipping. If you are in AK or HI please reach out to our support team for ordering options.

Check out our super easy assembly instructions before your bike arrives - we honestly think anyone can do it in around 20 minutes!

If you'd feel more comfortable having a professional mechanic assemble and prep your bike, you can check your shipping options in checkout to see if your location qualifies for $100 shipping and assembly at a shop near you!

Vvolt electric bicycles include a standard three year warranty against manufacturer’s defect, with no mileage limitations. Our warranty covers issues you may have with your bike, inclusive of battery, motor, transmission, belt, wheels, brakes and other components.

View full warranty terms and conditions here.

Trusty Companion

Trusty Companion

Reliability is key when you’re venturing beyond where other vehicles can take you. With plenty of torque and an internal transmission protected from the hazards of the trail, the Sirius is ready to search out new places or help you reach your favorite destinations with greater ease.

Nimble Handling

Nimble Handling

27.5” wheels offer a more nimble ride than 29” wheels, key when managing the extra mass of an ebike on singletrack.

Bumps Welcome

Bumps Welcome

The suspension fork offers 100mm of travel, suitable for all sorts of unpaved paths, cross-country trails, and those bumpy roads around town.

Battery Power

Battery Power

Our standard 375wh battery provides up to 60 miles of range, more than enough for the average daily ride. Our integrated batteries maintain a clean look and reserve space in the frame for water bottles and other accessories. Our integrated batteries can be charged in place, or removed and carried by themselves if your bike storage location doesn't have electricity.

Specifications Overview

375

watt hour battery

20

mph top speed

60

miles max range on a single charge

5

levels of assistance and walk mode

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