I have a 25 year old Lotus Classique 12 speed road bike that I never seem to ride. I am 70, in good shape, and want to get back to cycling. I decided to buy a new fitness bike and narrowed my choice to a Giant FCR 3 or a Trek 7500FX. I like the Giant better but am concerned about the gearing (52/42/30 chainring and 12-26 cogs) which works out to a low gear of 31 gear in, while the Trek is ( 48/36/26 and 11-34) which works out to 21 and should make it much easier to climb hills.
Several people have recommended that instead of buying a new bike I should upgrade my Lotus with new equipment. I can't decide which would be the best decision. Any advice would be appreciated.