Joined: Jul 2015
Posts: 7,380
Likes: 3,222
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
those mild steel frames tweak easily...
could be wheel dish/centering, or the frame itself may have issues.
is the rear wheel centered in between both the chain stays and the seat stays? or just between the chain stays, and not the seat stays? that could be either dish, or frame bend.
Get the wheel dish checked, then see if everything lines up better...
also, CABLES can, and DO cause off center steering...
inspect the rear of the frame first, then report back, ok?