I went to these after running four sets of R888R, grip is pretty similar, if not slightly better, but these will last a long time. After a recent track day, really cooking these tires, and they are holding up their shape and not rolling over. More testing will come soon, but I can say these are built for endurance in mind. Good for a track day and not wanting to destroy any slicks.

Very good sticky tire. Need some warming up, but after that is amazing! Very good choice of you are a sporty / racy driver!

Dry and wet grip is fenomenal, when cold and normal driving it doesn't wear too much like softer tyres and has great grip cold but when warmed up it outperforms other older semislicks. Easily 1+ second faster per "track minute" than a ToyoR888R. It's also a confortable semislick it doesnt create much noise thanks to its pattern. It is a premium dual purpose semislick, sad part is yokohama keeps increasing it's price.

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Bought these tyres mainly for track use, but also ended up using them on the road last summer. Extremely good on track, even better in the wet which surprised me. Side wall is ultra stiff but I enjoyed this and rolled over potholes in the UK no problem. Wear was ok, I did 7 track full days in these plus driving round 3 months in the summer. Will be buying again.

Amazing tyres for lightweight platform (car weigh under a ton). Cornering ability has improved dramatically, it feels like the car has been fitted with LSD, the harder the car is push into the corner, the more it goes into the corner (OEM tyre, CSC5, would resist and step out). Now the car feel so much more eager to rotate. Astonishingly, the tyre also make the car more settled, I suspect due to stiffer sidewall which let the suspension do its job better. Steering feel has also improved considerably, more granular feeling.
A little bit greasy on the wet but it's ok since the tyre will communicate this through the steering wheel. The noise it generate is of different pitch than OEM, more of a rumble instead of a roar. It will start making considerable noise at 30km/h but strangely doesn't get any noisier.

Down size from HANKOK VENTUS S1 EVO3 255/40/18 To AD08, totally different character . impress me for every corner , so much confident for the ride. Grippy tire .

Very good track tires
Above the level of grip
Steering and road feel feedback is above the level
Focus on endurance and stability. Even after running 30 laps in Dapeng Bay, it still did not fade.

I have RWD car, over 500HP, they do not hook for the life of it in first or second gear in WOT unless you baby the throttle. They are okay for daily driving, that's about it. Would not buy it for high HP car or track use, was very disappointed in performance. Will not buy again, once they are done will switch to something else.

Ridiculously good in the dry, and even the wet once warmed up. The grip they generate is face bending once they're up to temperature, which they get up to after the first few corners. The road feel is unbelievable compared to even UUHP tyres like the Goodyear SS, which feels soft and wallowy in comparison, and have survived a round trip to the Nurburgring, including 10 laps with no discernible wear, the only tire I'll ever run on my car from now on. Only thing to watch out for is they run wide even compared to other semi slicks, a 265 is more like a 275 in width.

Fitted a set on my stock-ish i30N hatch (just replaced some front bushes to minimise wheel-hop) to replace a set of worn-out AD08'R's. The car is 95% road use with the occasional motorkhana thrown in - which is the main reason for running these tyres. (In fact I won a motorkhana series outright one year on the AD08R's!) It's hard for me to rave about the AD09's as the AD08's were such a phenomenal tyre. To be honest, I don't feel there is a huge improvement over the AD08's, except in wet weather performance, especially in reduced aquaplaning. So I would call the AD09's and evolutionary rather than a revolutionary step. They come into their own when you have a car that you want to indulge in some lower-level motorsport but don't want the hassle of buying another set of rims and constantly swapping them over. The one tyre will get you safely around town and do country runs in the wet and dry and then be ready for whatever spirited driving you want to throw at them. A pure blast driving them through a twisty country road where their sure-footedness and relative comfort allows you to safely push hard, knowing that a pothole or rut wont upset them too much. Because they've got 90% of their grip when cold, you can absolutely cane the opposition running A050's if competing in the wet. The only tyre that comes close when competing in the wet are the A052's but these are too soft for every day use. I would say hands-down, the AD09R is the best dual-purpose road-track tyre out there.

Had this on for close to a month, perfect in the dry and road feedback was superb. On the wet, it's great but then hitting any water puddle while on the highway/freeway it can get sketchy. Definitely an upgrade from the previous AD08R. Yet to get used to my current set of AD09. Will review much more in the future regarding this marvelous AD09.

I call the AD09 the "50hp" tyres. So much grip it makes my car feels like it has less power, well my shitbox only has 130hp. Never locked up once despite not having ABS, maybe I haven't been on the limit of them. What a stark contrast with the AD08R it replaces. Perfect weekend touge/trackday/gymkhana tyres for the advanced driver. Best part is, its useable even during very wet monsoon season! Sublime piece of engineering!

One of the best I've ever felt on the street. Grip is phenomenal both wet and dry, noise was ridiculously low and I'd say the wear rate is one of the best I've ever seen in a uhp tire. I'd buy again and again, it literally felt like I could do anything with confidence.

Surprisingly good on wet grip and very quiet for 200 treadwear tires. Dry grip and handling was very good, meet expectation. AD09 was a very civilize modern tires, it give you the dry grip and handling that what you want from extreme UHP tire, at the same time it does not sacrifice too much of daily comfort and wet grip.

The perfect tyre, for fast drivers!