Tyre buldge

Inner edge as well, so you wouldn't expect it to be kerbing damage. But a truly horrific one!

likely caused by bead braking paddle on tyre machine, I've seen this a few times and the reason was just that, maybe that tyre in the last twelve months had been subject to a puncture repair and had sustained that injury during the repair process or had been stopped from one wheel to another in the part worn tyre trade ? I always pay extra careful attention to sidewall when someone comes for a retest with part worn tyres.

probably a dodgey tyre to begin with? i've had a few in the past, that started leaving tread behind! could have understood it, if it was a remould.