Kumho Ecsta PA31 

I had used the previous AD08R and loved it. I was getting ready to take my Boxster to COTA and wanted a good 200 treadwear tire. The new AD09 is one of the few that comes in the right 20 inch sizes for my car. The AD09 did great at COTA and in other track days at MSRH. They do wear fairly quickly, but that's expected in a 200tw tire. I've been very happy with the AD09 as both a track tire and a daily drive tire. I didn't get a lot of wet running on them, but the bit that I did was good(at MSRH).

Extremely pleased with the AD09s so far. They gripped very well in the wet, and phenomenal on dry pavement. Every bit as good as the more expensive OEM tires but better in the wet and cold.

This is one of the only tire options available for the 991.2 GT3 that aren't the Cup2s. Driving around town, the AD09 and the Cup2 are very comparable with the AD09 being ever so slightly harsher on medium impact road undulations. Turn in is sharper and feedback is stronger as a result of the stiffer side wall most likely. I ran my normal coastal roads at the same pace I would with the Cup 2s and get the same level of grip and feedback. I observed no weaknesses in this tire for average day to day driving compared to the OEM Michelin. Now for the track.. I run the car in group 4/TT and have raced for years. This tire is likely 1, maybe 2 seconds slower a lap than the Cup 2 but I would argue that's only relevant if you're trying to set a qualifying lap. Where this tire shines is in it's consistency and how well it holds up to abuse. I'd wager that the average group 3/4 driver is quicker with this tire since you don't have adjust for the performance fall off the way you do with a Cup2. If you were comparing average lap times over a session, I bet the AD09 wins. I will say, this thing wears like iron compared to the Cup2s. After a 10 sessions on track, no graining, cupping, wear spots or appreciable reduction in tread.. nothing. Conversely, I could easily wreck some Cup2s in a weekend. End of the day, some drivers will notice the slight reduction in absolute overall grip but I think this tire makes up for it in price, consistency, wear rate on the track and usability on the road. If you absolutely need the best lap times than you should be probably looking at a Hoosier anyway.

These are a great tire that provides the driver with excellent road feedback and unparalleled steering response. You feel everything and it is easy to gauge the limits of cornering with this tire. Highly recommended for performance driving.

Fast delivery and excellent customer service. I had a bolt get stuck in my tire while driving and I ordered a replacement. My order was delivered and installed the next day! The Road Hazard warranty reimbursed me for the cost of the tire within a week!
The tires have good grip and wear resilience is impressive. They get slippery after a few hot laps and become unpredictable. I like the Cup2s better for the track.

Not as track capable as previous model A052 but tire wear is incredible. previous experience with Michelin, Continental and Toyo DOT legal track tires - 8 track days max, these tires double that.

I run several Porsche club track days each summer and need a tire that works well there as well as a summer daily driver in between. After about 600 miles these Yokos seem perfect. They immediately felt as comfortable for daily driving as my stock Pirelli PZeros, but with increased steering precision and feel. At the track it took me a few sessions to get the pressures right but then they were amazing. At the track on warm/hot days I found that starting at 30lbs cold all around worked great and resulted in hot temps of about 35F and 39R with great grip. I did not experience any wet yet and unclear on longer term durability but if I get a full summer of track season out of these I will conclude they are outstanding value/performance for my needs.

After about 10,000 miles, 2 road trips from Oregon to Colorado, several HPDEs, Track Sprints and AutoX's, I gotta replace the rears on my 991.2 C4S. These are a great value for the amount of grip you get. AutoXers wont find it hard to keep pace with the meta tires, AO52's included.

The tires have great grip from cold to warm but you'll find they punch WAY above their weight when they get a super hot canvas to stick to, where the meta 200tw tires stat to get greasy. Track days in the PNW have lots of rain and these will allow for quicker times in the wet compared to the AO52s. My only complaint is lots of road noise, some slow turn-in response and how picky the grip threshold is when the tires aren't at the perfect psi.

Highly recommend for the price for anybody running 20" wheels.