If the lugs, the blocks on the edge of the tread, are all the same dimension then you get noise, because they set up a harmonic. If they are different sizes then they are much more likely to be quieter. Modern tires use this feature to provide traction and low noise.
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2007 X3 3.0si, 6 MT, Premium, White
Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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