Your trusty companion in the backcountryAdding 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! FeaturesLightweight Alloy FrameAir sprung suspension fork with 100mm of travel250w (500w peak power!) MPF mid-drive with 80Nm of torque375wh Celxpert battery with LG cells – 5.5 hours to full charge20 to 40 miles range on a single charge!54-56 pounds depending on sizeTorque sensor automatically adjusts assistance based on how hard you pedalEnviolo TR rear hub with stepless shifting and 380% gear rangeGates CDX Belt Drive, Cog and SprocketHydraulic Disc brakes with 160mm rotorsClearance for most 2.4″ tires (particularly aggressive tread could interfere with the frame)Front and rear rechargeable lights includedOnboard computer4 levels of assistance plus walk modeBluetooth-compatible for pairing with phone appUSB outlet taps into battery to charge your devices on the goStandard 20mph Class 1 Controller / Optional 28mph Class 3 “Warp Core Upgrade” Controller*Specifications subject to change without notice SizingOne 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. Get AnswersWe’re here to make it easy to get exactly what you need. Get in touch!Monday – Friday, 8am – 4pm PTMessage Us Call Us Resources Shipping InformationBikes are in stock! But we do build each bike to order. Our workshop currently has a 1-5 day lead time before shipping orders out.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! 3 Year WarrantyVvolt 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 CompanionReliability 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 Handling27.5″ wheels offer a more nimble ride than 29″ wheels, key when managing the extra mass of an ebike on singletrack.Bumps WelcomeThe suspension fork offers 100mm of travel, suitable for all sorts of unpaved paths, cross-country trails, and those bumpy roads around town.Battery PowerOur standard 375wh battery provides up to 20 – 40 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.