Cane Creek headsets have replaceable bearings - below is a list of headset standards and the bearing size.

EC30 will take a 38mm bearing

EC34 will take a 41mm bearing

ZS44 will take a 41mm bearing

ZS49 will take a 41mm bearing

EC44/40 will take a 52mm bearing

EC44/33 will take a 47mm bearing

EC49 will take a 52mm bearing

ZS56 will take a 52mm bearing

ZS62 will take a 52mm bearing

IS41 will take a 41mm bearing

IS42 will take a 42mm bearing

IS47 will take a 47mm bearing

IS52 will take a 52mm bearing

Pro tips:

Your headset requires an upper and lower bearing (Tapered headsets require two different size bearings)

All Cane Creek headset bearings are cross compatible with Cane Creek headsets no matter the series (i.e 110 Series bearings are compatible with Forty Series cups).