the strut from frame to suspension for damage. If the strut is old might have popped the seal on the silicone and that allowed more slack in the joint?
Look for a damaged rim for out of round or lateral dent at tire bead.
Also possible is you broke the tire belt(s) internally. Not easy to determine that but look for local area damaged rubber on the tread. If you see damage or not replace the tire with one from the rear (NA all tires the same but use same side since the rims are directional) and see if problem goes away. I it goes away gotta get a tire :-( since once belts damaged tire is unsafe.