Joined: Mar 2007
Posts: 9,222
Likes: 5,439
From: SF Bay Area, East bay
Bikes: Miyata 618 GT, Marinoni, Kestral 200, Soma double cross 2002 Trek 5200, KHS Flite, Koga Miyata, Schwinn Spitfire 5, Mondia Special, Univega Alpina, Miyata team Ti, Santa Cruz Highball, Waterford rs11
That sidewall looks to be where a seam is and may just be excess material. As far as all the concern on the wear, if they carry a load or are a larger rider, I would think that was normal.