How close is too close for comfort?
I have bikes with chainring/chainstay clearance of only 1-2mm. It's fine as long as you don't bend the chainrings.
However if another 1-2mm will help you sleep at night, you might be able to put a shim under the right cup, moving everything out that far. The limitation will be that the left cup moves in by the same amount. Whether this is workable depends on the relative fit of the lockring and cup. Many have the cup outboard so moving in is possible, but others are already flush or even inboard and there's not enough available thread to move the cup in.
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Last edited by FBinNY; 02-18-13 at 12:20 PM.