Joined: Dec 2016
Posts: 1,319
Likes: 993
From: Monkey Junction, Wilmington, NC
Bikes: 1964 Schwinn Paramount P-13 DeLuxe, 1964 Schwinn Sport Super Sport, 1972 Falcon San Remo, 1974 Maserati MT-1, 1974 Raleigh International, 1984 Lotus Odyssey, 198? Rossin Ghibli, 1990 LeMond Le Vanquer (sic), 1991 Specialized Allez Transition Pro, +
Filiform corrosion generally will not affect the structural integrity of the frame. Usually it is a direct effect of the owner (or PO) failing to care for their bike: at least toweling off the sweat they've rained down upon the frame. Sometimes it can be the result of bad paint, or paint job as well.
Pull the seat tube and check for internal corrosion; always a good idea in any case...
But don't sweat the surface stuff. Treat it, maintain your bicycle, and ride on.
(Oh, and pics don't show, for me anyway. Please try again. We appreciate pics. Pics are worth many words. I wish I had a pic to express how many...)
Last edited by machinist42; 06-12-17 at 03:27 PM.
Reason: pic up, or not. fili like it