Sorry, but the requirements are a little complicated. (1) The bike would be used only 4 months a year (will that ruin batteries?); (2) the roads are concrete, asphalt and dirt; (3) there are LOTS of speed bumps, some of which have cut-outs in the middle where a bike tire would fit (don't want small wheels); (4) I had a big toe and metatarsal removed at Christmas and cannot mash the pedal on that side (can pedal on the flats, but they are rare); (5) don't need range over about 5 miles but the hills are ferocious, so I must have torque; (6) I'm 5'10", 71 years old and 182 pounds. 120 V AC is readily available. I normally walk everywhere when I am there but Doc says I must get some form of transport when I go this year. There are a couple of E-bike shops in Mexico City and hub kits are available as well. It would be impossible for me to get a bike from the US to where I live (and would not be easy to get a whole bike from Mexico City to where I live). A hub motor and battery from Mexico City and buying a mountain bike near where I live would not be hard. Necessity may drive me to a little gas motor for a bike, also available; I don't have or want a motorcycle license, and the smaller 90-110 cc motorbikes available have smaller diameter wheels than I want given speed bumps that are 6" high and about 10" long. I don't care how slowly it goes so long as I can get up the darned hills, and I will use it exclusively for transport in the small village. Any suggestions?