Hi, It all depends what the offset is. take off the centre cap of your cmax wheel you should find a number like 61/2JX16H2 ET40. Or similar. 6/12 being the rim widthand the ET number is the offset measurement, if both wheelsthe same diameterand have the same offset and have 5studs they should fit, but not necessarily. As the cmax and galaxy have different disc sizes and different callipers the actual shape of the profile of the inside of the wheel may be different, and this may have the effect of the calipers touching the wheel. If you have them to try on then your ok, but if you have to buy them first you may end up loosing your money.
Another thing, are the galaxy rims the same width as the cmax?? this could all effect the handling and ultimatly void your insurance if you end up the wrong side of a hedgeEdited by: marshal
2.0 TDCi Ghia 06 in Panther black.