The specs and real performance of these tires are incredible. 255/35R21/XL 98W Front - 275/35R21/XL 103W Rear. I know My Tesla MYP can outperform 97% of the vehicles on the road. The car can do 0-60 in 3.4 seconds. Most likely your non-Tesla car cannot. I put it to the test on my daily 55 mile commute. The tires have a lot to do with this. The heavy EV and high speed rating are brilliant technology. Fully confident all weather rain/sleet /snow/ice at very high speeds. Hey Michelin Bring back Premium Touch.. love it

Significantly louder than the HX MXM4's they replaced. Noise starts right at 40mph and gets significantly louder at highway speeds. Likely going to swap them out for another brand as this is the only Michelin tire that fits 245/50/R17. Tire handles great but I just can't deal with the noise.

Bought these tires about a year ago and have no complaints at all!! They’re much grippier than my old tires and are whisper quiet. Unfortunately, my MPG has taken a slight hit, but that’s a small price to pay for much more confident braking and handling.

These were quite a bit softer and quieter than the Pilot 3 + tires removed after 40,000 miles. The Pilot 4 AS felt initially like it wouldn't be the same in handling as the 3+ AS but that was totally wrong. They handle great. I would definitely buy them again.

Terrible quality control. Michelin supplied 2 additional replacement sets and all 3 sets produced a vibration. Tires seen bouncing on the balancer and unacceptably high road force. 26lbs is WAY too much tolerance!!! 10 lbs is felt on low profile tires. No longer a market leader in quality.

I bought these today 1/25/21 at 12pm and drove for approximately 100 miles and boy let me tell you. I came from Pirelli scorpion run flat tires and it is a night and day difference. These Michelin’s are on the money. What a smooth floaty drive on my 17’ X5 MSPORT. These tires are very sticky as I hear them when I roll down the windows. Very responsive steering improvement from runflats. These tires are everything. I feel much safer having my family in the car. Thank you Michelin.

I bought a set of pilot sport AS4 to put on my car and I absolutely love them the amount of control and response difference compared to the stock tires was unbelievable and as far as grip goes I have a hard time breaking loose when I try to do it on purpose

BMW M235 My previous tires were Pilot Super Sports which I found to be fabulous in traction, ride and response. But, living in the snow belt, the lower temperature season can really shorten the time I have them on the car. So when I needed a replacement I thought why not go with the AS4 , maybe loose a little performance but enjoy a longer time with no snow tires on. I've now driven about 600 miles with them. I find them as harsh and uncomfortable as the RFTs that were OE on the vehicle. Jarring really even on the softest suspension setting. Further my dealer could not balance them for a smooth ride after 3 tries on the Hunter Road Force. I will say that after the break in, they had good traction in dry and wet. Never got to snow. I'm calling uncle and swapping them out for another brand.

Purchase these for all-season use in California. Rode these through the recent cyclone storm with no issues. No hydroplaning and complete confidence in braking and cornering. Ride is quieter than I thought. I drive a EV so only noise is from the tires which was not really noticeable. Only thing I would change is the lip of the tire seems to offer little protection for my brand new wheels. It sits flush with the lip of the wheel and I can already foresee curb rashes. If they can bring out the lip of the tire a bit more to protect the rim, I would give it 5 stars. Othere than that, a super high performance tire. I take off fast, corner fast, and stop fast so a high performance tire is required.

Too many reports not indicating what vehicle the tires are mounted on! What good is such info? I have a new set of 245/4018 going on our 2019 RS 3, which has run 16,698 fast back roads out of a total 23,192 on current Michelin A/S3+ with no issues at all. Will report on the Pilot Sport 4S after some mileage is run at speed.