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Ah, sorry ... didn't see your last post.
I've been solid busy, doing a conversion on my winter bike .. and it needs to be on the road pronto.
Anyway.
From memory, fitting the half rings upside down can alter the clearance by up to one full step in shim sizes.
However, a word of caution ...
It seemed obvious to me that this would only be a temporary alteration as the half rings would bed in the other way sooner or later ... probably sooner.
The same seems logical if new half rings are fitted too.
Therefore, despite having bought a full set of new half rings, I ended up preferring to stick with the old ones, carefully fitted the same way up as they came out.
My new ones are still in the bag, 3yrs later.
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