wheel vibration (asking for a friend.)

[IALuder]

Ok, this is getting annoying... but will someone please tell me what causes a vibration in the steering wheel?? Mine does it around 50-70mph...

It's pissing me off because, I had a new set of tires all around about 3 months ago... and now the front ones are SHOT but my back tires look BRAND new!! And I have hardly been aggressive on them!!

My car is lowered about an inch only in the front, the backs are stock. (do I still need a camber kit for the front?)

From reading other posts I thought that the balancing of the tires was the cause of it, so I got new tires installed and balanced the other day but the vibrations are still there!

The vibrations dont occur when braking so I know its not the rotors/brakes...

I don't want to have to replace my front tires every 3 months because that could get costly... I also took it to mienikie for them to do the free inspection and they said I didn't need an alignment done... anyone experience this befo?