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Discussion Starter · #1 ·
I am running 2x9 with FSA afterburner cranks. The drive side of the crank is open, you can see through to the preload screw on the non-drive side. I replaced a chainring a few months ago but for the life of me can't remember if i took out a plug or something. There are no threads on the inside so i know it wouldn't be a threaded screw, but there is a groove. Am i missing a push in plug or something?
I guess dirt can get in it but not sure if that will cause any issue, its alum so it wont rust.
 
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