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Counterpoint: As someone who likes to run frames for more than a couple years, I think pressfit BB's are better for carbon frames than thread-in. We need more tools for pressfit, which sucks, tolerances need to be good, and the installer needs to know some wrenching best practices as Andrew says.
I've already had one frame go to warranty due to a threaded aluminum BB insert that came unbonded from the carbon frame. This is a high-load failure point that can be eliminated with _properly implemented_ pressfit BBs.
But the industry screwed this up due to some crappy products when pressfit first came out, so now everyone thinks they always creak. I'm going to be pissed if my current carbon frame dies after 3 years due to a threaded BB insert.
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