Joined: Jul 2015
Posts: 7,342
Likes: 3,201
From: NW Oregon
Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike
there are three places on your bike that use those types of Screws...
the big ring and middle ring... look ok in the pic..
the small inner ring... check it, let us know.
and finally, one might be used to attach the DERAILLEUR HANGER to the rear dropout... and those are usually the Shortest Screws of that type, unlike the one you just found on the floor.....
Last edited by maddog34; 01-28-26 at 06:25 PM.