The only thing that comes to mind is maybe make 1 inch long bridges out of, say, 0.25 aluminum. Run an M6 hole through one end for the eyelet mount, and then an M5 hole at the other end for an M5 screw and locknut, presuming they make M5 locknuts (I didn't see any at the LHS, but on the other hand I wasn't looking). As long as I have enough clearance at the top of the tire, it seems like it should work.
What I really need is an M6 sleeve that would accept an M4 screw...I could always cut a slice of tube to shim out the rack mounting point. *sigh*
Last edited by Katzenjammer; 12-01-06 at 03:54 PM.