Originally Posted by
downtube42
From a marketing standpoint, tighter tolerances have become associated with higher quality, even though they can result in more failures and higher maintenance cost. For the company, this can mean higher warranty cost and damage to the brand image.
OK. I might be totally off-base here. But it sounds like you misunderstand what "tolerance" means.
https://www.thehighroad.org/index.ph...vs-fit.686715/
Tolerance is not the same thing as fit. You can have a part with extremely tight tolerances but a very loose fit. Similarly, you can have a part with very loose tolerances but a very tight fit. The latter is extremely common with press fit bottom brackets. Hence the adoption of pliable nylon bottom brackets.