Originally Posted by
Branko D
A 2mm spacer is generally enough, and no spacers will work perfectly if the top cap is designed for it; the important bit is that the top cap can push "against" the stem.
Anything more than 5mm is unnecessary, and tall spacer stacks above the stem prevent the compression plug (depending on it's length) from supporting the stem from inside, so with a spacer stack you will be clamping unsupported carbon, which is a bad idea and not how it was designed to work.
Not sure this makes sense to me, the steerer had the stem at the top with just enough gap to allow for proper preload and 33mm of spacers below. If I rearrange the order and move a 10mm spacer above the stem with a long enough compression plug what difference would it make? The compression is 40mm long and reaches below the top bearing.
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05 Gunnar Roadie Chorus/Record
67'er