The 48 tooth triple is more of a hybrid so its not so bad. Before changing it out you might want to be sure you are not mashing the gears pedaling too slow. A 48-13 at 90 rpm is 27 mph which is fairly fast. Changing the crank to a road crank might mean you need to change the front derailer as well so keep that in mind and yes the shifters you have may or may not work with the crank and derailer you put on there it just depends. Just some stuff to think about. =)