On my race bike I have a crankset FC6603. I want to replace my outer chain ring (My inner and middle chainrings are OK).
But I cannot find an online store where they sell the outer chainring of this series. The middle and inner ring are available on the online stores, but not the outer chainring.
Maybe the outer ring isn't be produced anymore? Which series (with an available outer chain ring) is compatible with the series FC6603?