These tires replace the prior generation Michelin A/S 3's that I
had on the car. One of the great features is the 45K mile warranty
-- which I used to get into these tires. After 21K miles, the prior
set was down to 3/32 in front and 4/32 in rear. They had gotten
noisy, harsh, and obviously past their expected traction
sweet-spot. So these new A/S 3+'s are a...