Originally Posted by
Altbark
I have the same problem with my Mavic A719's. Don't worry about it. Centrifigal force takes care of it once you start moving. Mavic uses some bit of metal to align the rim ends during construction and that little chunk of metal can sometimes come free. My front rim ticks when I walk the bike and the back one doesn't. Feel free to ride. Al
This is probably the culprit. It's easily fixed on a rim like the A719: go to the home-improvement store, buy a can of "expando-foam" canned insulation, and inject the rim at the joint. The foam will expand and immobilize the metal "slug" that was used to align the ends of the rim for welding. If the rim has no spoke holes in the bed, you can drill one just large enough to slip the can's injection straw through.
Another option is to support the rim on the edge of a 2 x 4, then peen the rim bed with a blunt nail. You'll probably see Mavic's own peening marks, in fact. It may take a pretty substantial divot to immobilize the slug this way; I'd rather use the expando-foam if it were me.