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snottyotter-
https://dassets.shimano.com/content/dam/global/cg1SHICCycling/final/ev/ev/EV-BB-UN300-4708.pdf
it isnt listed on the blown up pdf document. (its not the chain case stay)
but it reads "Better chainline stability with chain line stabilizer" Maybe this is what they are for. Chainline stability???? (Photo attached)
gubhi
oh okay, yes, a v weird component.
Ill keep an eye out for some steel ringed bbs, i wanna check one out for sure.
imagine the complicated convo about all the weird spacers and seals on external bbs hahaha