What is the difference between a 54/42T crankset and a 53/39T crankset? I know it has something to do with the number of "teeth" on the cranks right?
Also I am looking at two tribikes - one has a FSA Gossamer TT Mega EXO aluminum crankset with the 54/42T set and the other has an Ultegra 53/39T. Obviously the Ultegra is better but how much better? I am pretty big (6'4'' - 200 - 210 lbs depending on the season) Would I wreck the aluminum set when I really crank down on it. My road bike is all Ultegra and I never have a problem.