i've got SP9000s on my E55 AMG, 245/40/18 and 275/35/18. whenever i'm on the highway, these tires drone pretty damn loud. they almost make a constant thumping sound, like when the tires have a flatspot but the ride is smooth.

the fronts have 80% of tread and the rears about 60%. what are some quieter tires? i want a set that can also do OK on light snow.

 

Try some Pirelli P-Zero Nero's.