2012 cooper s 46k run flats with less than 10,000 miles. Motegi wheels. Driving home today I hit a good on-ramp and with no traffic in front of me I pushed the car hard like I've done many times before. I had the windows and the sunroof open. I noticed on acceleration that there seems to be a grinding noise coming from the driver front wheel. Kind of hard to describe. It only seems to occur under this scenario, high speed (55 on a 25 ramp), and only when the accelerator is pushed in. Kind of sounds like plastic rubbing on concrete is the best way I can describe it. Checked it when I got home everything seems to be in good order. Any ideas? Thanks

 

Check your inner wheel well liner. You might have something rubbing under load

 

That's a good thought, thanks