Shimano front derailleur support bolt backup plate missing on Cannondale CAAD 13 105

[Cloned]

Recently bought a new CAAD 13 and found that sticky metal plate in packaging with spare parts/bolts. Wondered what it was, searched the internet. Found Shimano manuals which state it's mandatory to use this one if bolt is touching the frame of a bike. CAAD 13 has front derailleur mounting point welded to its frame so actually now support bolt is screwed into painted aluminum surface with glossy finish. I guess bike shop doesn't have anything to do with that, because this part is probably pre-assembled by manufacturer.

My question is simple, should I reinstall my derailleur and stick that plate where it should be or it's really not worth it, or maybe it was left out on purpost for some reasons?

[ReapThaWhirlwind]

(06-08-2021, 10:35 AM)Cloned Wrote:  Recently bought a new CAAD 13 and found that sticky metal plate in packaging with spare parts/bolts. Wondered what it was, searched the internet. Found Shimano manuals which state it's mandatory to use this one if bolt is touching the frame of a bike. CAAD 13 has front derailleur mounting point welded to its frame so actually now support bolt is screwed into painted aluminum surface with glossy finish. I guess bike shop doesn't have anything to do with that, because this part is probably pre-assembled by manufacturer.

My question is simple, should I reinstall my derailleur and stick that plate where it should be or it's really not worth it, or maybe it was left out on purpost for some reasons?

You shouldn't be lazy. Take it back off and apart and put the plate where it's supposed to be.