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I wore out chainrings on a gravel type bike in like 3 years.. it wasn't a lot of miles. Seems like it mostly had to do with the right kind of grit getting in the chain. You will know if you wear out rings, it is a bit scary!
I have had others wear out faster though.
Let's be real, there's a large segment of customers for this new eTap AXS who will pass their relatively unworn chainrings on as soon as eTap AXS 2.0 comes out in 2021.
They won't care about having to replace the PM with the rings.
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