Hello, I have plans to upgrade two existing bikes to electric mid drives. Currently both of my bikes have a 48 tooth, 38 tooth and the inner is a 28 tooth chain drive. I suppose when I make the conversion, I will only have One chain drive, 46 or 42 tooth? So I suppose this eliminates my front shifter as well? Also, I prefer to buy my parts from Johnny Nerdout, however, how does the shipping work?

Thank You,

Eric