Hi
I experience as simular sound from my new E70 (275 tyres front & 315 on rear) - on roads between 20 & 60 miles per hour I can hear what I describe as a hollow roar from the front. I have noticed different road surface will make a slight difference but its alway in the background.
I took it to the dealer last week who checked the car over and found no fault with bearings etc..etc.. they also test drove another E70 they had and it was making exactly the same noise - so its obviously common to all E70 with larger tyres... I would be interested to know if anyone gets the noise on the standard tyre versions ???