I like to take the train out to rural areas for day rides.I have been using a Dahon Espresso (folding) but a technician at my local bike shop told me he was concerned about the frame strength due to some problems he had heard of with folding frames.He said that as a result, Dahon does not even sell the Espresso in Japan anymore.I took his concern seriously, in particular, because my Espresso is about 10 years old and I am about 105 kg.I am now looking into replacement options.Basically I would like a bike which is easy to bag for train travel and able to handle someone of my weight and height (187cm).Any advice would be welcome.