Originally Posted by
Kopsis
My Aksium Race wheels used to rattle like crazy -- I figured out it was the valve stems. More specifically, the threaded retaining ring on the valve stems. No reasonable amount of tightening will keep the ring from loosening up and rattling against the rim. The fix was to just ditch the ring.
I didn't have a ring around the valve when I was riding so it must be something else. I put a 35c wheel on and different tube. I will ride later today and reply if the rattling has stopped. I don't think this will be the cure though.