What cyclist only has one bike? As my avatar says, I own 4 bikes, but here are my two recent acquisitions. Cannondale Neo e-bikes! (Topstone SL and Tesoro SL EQ, respectively) The assist is amazing for hills, headwinds, and when touring with the panniers. Otherwise, I just leave it off and it is a traditional bike. Battery is in the down tube, and the extender battery shown in the second photo can be added to either bike. (first photo that is a speaker, not bike battery, in the down tube water bottle cage).