These C'dales were usually spaced to 128 so that a 126 slips in easy and you have to pull it open a bit to slip in a 130mm. I run 130mm Campy 10s in both of mine. The ST has a little bit better RD alignment than the SR I have (I think mainly due to the longer chain stays) but both of them work well. Dr. Cannondale does these all the time also so don't let spreading the frame a little worry you.