That Grand Cru in a 48/30 likes like a great alternative between a triple and 50/30 compact (if only they weren't so expensive). I had planned on a 13/29 cassette. On the Grand Cru could I just use a Campagnolo 10sp group set. Any problem shifting between the 48 and 30 chainrings thought I read somewhere not to go over a 16 tooth difference.