Originally Posted by
SoSmellyAir
Yes, from what I can gather, these issues arise because (a) chain width decreases as the number of "speeds" increase, such that (b) chain ring width must also decrease correspondingly. To maintain good front shifting, the spacing between the chain rings is also decreased, except for the respective specifications between 10-speed and 11-speed road drivetrains. Thus, 10-speed rings can be used on an otherwise 11-speed drivetrain without issues.
The inner wide of chains (all of them...5-8=2.38mm, 9-12=2.18mm) is basically the same. The
outer width is what changes.That's why it's chainring
spacing that changes.
I don't have any idea why the OP doesn't want to follow the dead simple advice posted multiple time either.