I'm impressed: I raced automobiles, and am sensitive to everything from the engine to tires. Since I wanted the softest, quietest riding tire for the Escalade (opposite of the track), I ended up going with these. They are super quiet, reduced noise by at least 30 per cent and are very comfortable. It is even quieter than when new. Also, the guys at Tru-Line in Bellevue, WA did the best alignment I've seen on any vehicle. Amazing what a difference that makes.