I resumed working on this bike which has been in boxes for over a year now. I figured I'd better finish it before the batteries go bad or something. I had to gently squeeze the down tube to get this to fit. Luckily you can't even tell it's just a little more round now, It was so close to fitting before I squeezed it. I looked and looked for a frame that would accommodate these batteries and this is one of the few frame layouts that's almost perfect. If I really like it I'll take the batteries apart and redo it in a more space efficient way but I want to get it together 1st and see how I like it before I invest that kind of time.