I did look up Reef bikes & not impressed as i know so far no hub motor can not do the hills as mid drive system & if you want one thats already made go to this its virtualy the same as what i make up with cyclone with 500w but my battery front (around bot bar) 12AH home made fibre glass http://www.electricbike.com/lightest-bike/ this would have less AH=---must get picture of me like that I'm older.