Join Date: Dec 2003
Location: New York City
Bikes: 1999 Serotta Csi Custom, ~1984 Pinarello track bike
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you're worrying too much about this. maybe there are a few exceptions out there, but most any shim will work with any stem.
assemble it and take it for a gentle test ride. if something feels wonky, have your shop take a look.
signed, a guy who, for about four years, rode a quill-to-1" clip stem converter with a shim so he could use 1 1/8" stems (and just tonight, added a beer can shim so his slightly smaller nitto bars would work with his slightly larger 3t stem).