Building a Bomber ebike All frames are not made the equal especially Chinese ones Do your homework!
When I was researching platforms and decided to go with the Bomber styles there are allot to choose from. EEBs Vector Vortex, Risun several Chinese look alikes which this mainly applies to. I ended up going with one by NB power because of its great construction and battery compartment space which is also important if you want a big pack as not all of them can accommodate 21700s in a configuration that can get you a large AH. Do to the fact this has plastic panels which curve outward 1/2 inch on both sides that extra inch is very critical to come up with parallel 21700 packs. Anyway this is more about the shotty tac welds the break! Pay the extra money its the frame the most important part that ensures your safety, dont go cheap on the frame!