going to give the sprint a new set for Christmas. definitely going with an 18T front. but here is my chance to change the rear ratio too. would you "18T front guys" go +1 or +2 in the rear also; if you were doing a complete swap? I travel some on the bike to different AMA races around the area. road-A, Barber, Mid Ohio, VIR. But mostly this sprint is just a DO ALL bike for me. I'm loving it, but looking for even more bottom end, seeing I am 6' and 235lbs.