Also, I doubt you'll have compatibility issues - other than the fact you shouldn't go putting on a Swiss or French threaded bottom brackets on, and that the width of the rear dropouts might limit you to a certain number of gears. 120mm = 5 (possibly 6 with right components) 126mm = 6-7, 130 = 7-8 (if you want to know about 9 or 10, you'll have to ask someone else. 7 on the rear is enough to satisfy me).