Whoever does not try, does not learn.
If wheel bearings were slightly knackered, then they would make a grinding noise when turning fully either left or right. If it was proper knackered, then you would be able to feel play while moving the wheel (front wheels jacked up) or slight grinding noise while turning them by hand.
If the brake disc were warped, then the vibration will get worse while braking and the car will pull in direction of wheel being braked most; you will get excessive heat coming from the wheel; you will get a pulsating feel though the brake pedal too.
Sometimes brake pads get stuck on the brake callipers if they are not cleaned and greased properly.
If the wheel is not aligned properly (check tyre tread is not worn), or balanced (check wheel has weight balancers, most wheels do), or tyre may have a bulge, then this can cause the steering wheel to vibrate left and right too.
I had similar problems about a month ago after fitting new Pagid brake disc; I had frown my diamond black combi (grooved & drilled) as cracks were appearing after two years of use; I was slightly lazy and didn’t properly clean the wheel hub and brake callipers. Had massive vibrations after coming off a motorway, and I was fighting with the steering wheel to keep the car straight. Anyway, one weekend, just spent some time doing the job properly, cleaned wheel hubs, callipers and even brake pads with a wire brush, and had greased the section where the brake pads slide on. The car runs nicely now without any viberations, apart from the knocking feeling that comes through the steering wheel as most of by bushes have worn out.
Audi S3 (52) 265bhp Revo Stage 1