Joined: Nov 2010
Posts: 15,315
Likes: 903
From: Tixkokob, Yucatán, México
Bikes: 79 Trek 930, 80 Trek 414, 84 Schwinn Letour Luxe (coupled), 92 Schwinn Paramount PDG 5
Is it a Sansin Hub?
Edit: it looks like that tab would lock into the bottom of the dropout. For what reason I can't imagine. Other than to keep it from spinning so that other hole can do its job. Whatever that may be.
Edit2: That other hole could function as a second eyelet. Is it threaded?
Last edited by seedsbelize; 06-30-20 at 01:57 PM.