Originally Posted by
jimmuller
What the...? I realize I'm derailing my own derailleur thread here, but 2.54mm = 1" exactly, and 1-1/8" = 28.757mm exactly, and well, you get the idea.
Check your math on the 1 1/8" conversion, looks like you may have transposed some numbers. Anyway, the quill stems are classified by the OD of the fork's steerer, not the OD of the quill. Front derailleurs are 1 1/8 (28.6mm), 1 1/4 (31.8mm), or 1 3/8" (34.9mm). They are sized to fit the OD of the seat tube.