Calamus One is a bike we're proud to stand behind and know that you'll be proud to own. We're confident in our construction, design, and engineering - and you'll share that confidence with our 24-month warranty on all the electrical components, including the battery and a 5-year warranty on the Frame and Handlebar. This is a bike that you will be riding for years, and if something doesn't feel fine, we'll make it right. Ride with confidence, we've got your back.