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where do I need spacers (if any) in that assembly
You'll probably need a spacer between the top cap and the stem, unless you have a top cap with an integral spacer
Some fork manufacturers have expressed an opinion about a minimum amount of spacing between the stem and the upper bearing collet, but I've not seen any compelling argument for it.
If you haven't already wasted your money, consider an alternative to the Chris King such as the Cane Creek 40 or 110 which is properly designed. We've long since gone past the point where the compromised design of the CK was acceptable, and the flaw in the CK design is even more likely to cause problems with carbon steerers than it was with metal ones.
gbj_tester-
OK thank you - looks like there'd be a bit of a wait for one of your top caps, so I'll get a little 3mm to sit above the stem for now and trust in an LBS to cut the steerer to the right length to accommodate.
I won't be needing any spacers under the stem for fit purposes, so shan't concern myself with any.
And I've already got the Chris King on the bike, just converting the upper bearing cap from threaded to threadless, so will choose to blindly ignore your last paragraph :)
thross
I'm upgrading my Look from an inch threaded to inch carbon threadless set up, and have read so many conflicting views about spacers and shims and failing carbon that I want to ask the hive mind, and probably @mdcc_tester directly. Components will be:
Columbus Minimal 1 inch forks w/ carbon steerer.
Chris King 1 inch Nothreadset
1 inch to 1 1/8 alloy steerer shim.
1 1/8 alloy stem.
M Part 1 inch carbon steerer bung/topcap.
Question being, where do I need spacers (if any) in that assembly for structural safety?
I've heard combinations of none, one above, one above and below, and there don't seem to be any guidelines from Columbus that I can find given that they don't even provide a bung themselves.
Any help would be much appreciated before I order all of the little bits! Ta.