So I got a new rear 27" wheel for my Kalkhoff build a few months back and I want to put a 7 speed freewheel on it but my chain rubs against some bolts . There is not enough space on the lowest gear. I have plenty of dropout space and I could add a spacer but there seems to be not enough axle in the dropouts to make me feel safe. It's a quick release axle, by the way. Can the axle be moved over or can I easily replace it with a solid axle?