Installing the rear derailleur.
That bolt and nut attach to the rear derailleur. You can see the head of the bolt, in the picture, just above the axle bolt. That little nut is curved and fits into the rear folks the bolt and curved nut are tightened down, then the rear wheel is installed.
Last edited by Folksinger2964; 08-31-25 at 04:27 PM.
Reason: Misspelled word