I got a AE111 BZV Superstrut. However lately if I go on the motorway about 100km onwards it has been making a horrible metal like scraping noise. Have checked both brakes and suspension but all is ok. Only thing is tyres are getting low (i.e. 1.3-1.4mm). Dont think its this though. Other thing is that I have just put a new front bumper on and due to this my front mud guard is slightly loose. Although there is no signs off rubbing on anywhere I think it could possible be this.
Is there anything else I haven't listed that it could be?
The Shock Shop check my wheel barings today (I had to drive 160kmph on a hoist

I been to 7-8 workshops now and no one has had an answer.
It only happens about 100km onwards.
Any help would be appreciated.
Regards,
Gareth