Are you using Goodyear Eagle F1 tyres ?, had a few develop mysterious ridges, that had me 100% convinced that the joint was shagged, only when taking tyre off did I notice the ridges, so tried another wheel problem gone.
The ridges that developed were about 60-70 degrees apart, 4 in total, and that bad you could feel it tugging the wheel and clunking, never in a straight line though, it was perfect then.
tabetha