I have the new 2005 Volvo S60 D5. Have started to hear a droning noise coming from the front tires at about 40mph. Have checked the tyre pressure and they are fine. You can hear a lot of wind noise coming from The B Pillar but the noise from the front wheels is even louder. The car is fitted with Perelli P6000 Tyres. Is there a quieter tyre I should look for.