I have a 2015 Lacrosse Premium II with 20" tires. Currently running Bridgestone Potenza 245/40R20 tires. My problem is driving on concrete roadway, I can hardly hear the radio!!! On black-top surfaces they run exceptionally smooth and quiet. Has anyone else experienced this issue? I just bought this car, my first Buick, and really love it. 27,000 Miles. I'm new to the forum. Thank You

 

Recall similiar problem decades back driving on the cement NY state thruways. Think though this would have a lot to do with tread design and air pressures. Are they directional tires only and have mounted on rims backwards?? If so, the tires would have small unnoticeable labeling on them to that effect.

 

I've heard of the same issue from a buddy with lacrosse 20" tires, but honestly think if you get something a bit smaller it might be better. You will essentially have less rubber hitting the road producing less noise