Originally Posted by
gaucho777
Sorry to belabor the point, but I went back and measured a width of 16mm on my 7400 cranks where the spider meets the chainring. I would be grateful if someone could confirm a similar measurement on a Dura Ace 7700 or comparable crank. Thanks.

I have a 7410 crank and 7700 chainrings. They match well and the width of the mount where the chainring meets the spider is 16mm. Order it!