Thanks Bodi, that seems to have nailed it for me! cheers!!
It seems that people are getting confused with "tyre size" and the numbers that are actually PRINTED on the RIM next to or around the valve hole.....
These wheels came to me with some stuff in a deal, and were MEANT to be cb750, which they are definately NOt. The book size for the rime on the front of cb750 sohc's says 3.25 on most of the models, so i knew they must be off something smaller, but i dont have any smaller bikes to have looked at, so a BIG thanks........