I don't see what they have to do with the front derailleur.
The spider extensions buttress the chain ring so that it flexes less when you change up.
Cheers, I didn't know that but I still want to keep the original look so filing them off is not an option.
filing them off is not an option
Facetious, moi? Just trying to compass the bounds of your vanity :)
@Sig_Arlecchino started
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The spider extensions buttress the chain ring so that it flexes less when you change up.