A general question from a still spry 73 year old. I don't think I have the mechanical ability or patience to modify a bike to a motorized or electric unit. I have a 15-speed with somewhat medium wide tire but not as wide as the old balloon tires. Considering safety, stability, ease of maintenance, noise level, cost and something not too speedy, what would you recommend for one of the geezer crowd? The way and speeds people drive in the cities here in Colorado, I would probably take it up to some of the small mountain towns and tour on the back roads. Oh yes, it would have to run OK at altitudes to 10,000 feet. And, probably something I could mount on a trunk type bike rack. Might be a good way to peruse some of the trout streams.