Train enough and most any bike will do.  Getting your butt, neck, hands, and legs in shape is key; be sure to stop a lot to enjoy the daily ride. The first year I rode, SAGBRAI, before these high tech machines of today, where most bikes were average at best, I rode a 42 lb 5 speed schwinn.   I would not hesitate to take it this year.  Still got her hanging in my garage…