Kumho  Ecsta PS91

The best combination of traction, treadwear and price that I have ever purchased. As a max performance tire the dry traction on a hot day is unbelievable. I grew up on Michelins and Pirelli and Dunlop D40 and Goodyear wingfoot and this tire is like slicks. They pick up gravel and stones like gumballs even after 2000miles. There are raceflags imprinted on the tread with gradations so I can precisely measure treadwear across the width and the projected life is easily over 20,000 miles. Made two round trips from FLL to ATL and are much quieter than stock. Wet traction is excellent as well as hydroplaning resistance. Minor flatspotting overnite that goes after 5 miles. For the first time I can really experience how good the car is designed. You get deep in a corner and roll on the gas coming out and the grip is so good that you can dictate the speed or slip angle of the exit while holding the racing line with total predictability. When I first looked at the price I thought it was a closeout and the reviews were sparse. Took a chance after reading about the technology behind the design and rubber. Even now I walk to the car and still smell the rubber. Will probably buy another set and put them in storage as the price can only go up once the word gets out.

I purchased these tires from Tirerack.com in November 2016 when they were on sale with a rebate offer. At the time, this was one of the few tires that had a (Y) speed rating other than OEM. They have been daily driven.

Tread Wear - At 10,000 miles, the front and rears have 5/32. I did not rotate the tires and the fronts show camber wear (inside tire wear) with 3/32 tread. The rear tires wore evenly. If I rotated these, they would have likely worn better. I have rotated them and will likely get 2-3,000 miles more before replacing.

Cornering - These tires still corner like day 1. They keep the vehicle planted in the turns, provide confidence and are predictable. However, steering feels loose and requires more corrective inputs when driving straight; likely due to the camber wear on the tires.

Grip - The tires still grip very well vs. the OEM All Season tires. They keep you straight in rain and still provide confident grip. With more wear on the tread, the tires tend to flat spot easily after sitting over night. It usually takes about 5 minutes of driving for the tires to warm up and can likely be fixed with a slightly higher tire pressure (currently running 31-32 psi cold and gets to 33-34 hot).

These tires have seen a mix of highway and city daily driving and one of the few tires with a (Y)-rating other than OEM. For daily driving, they do a better job of putting the power to the ground from a 650 TQ engine compared to the stock Pirelli PZero Nero All Seasons.
They handle predictably well in the rain (better than OEM) and give confidence while accelerating and turning.

The tires started at 9/32nds. After 9500 miles, they are at 5.5/32nds (worn 3.5/32nds) and are wearing as expected for a 260 wear rating tire (7500 x 2.6 = 19500 miles / 7 = 2785 miles per 1/32nd). They should be good for another 6000-9000 miles of daily driving, however, they will likely loose their tread life quickly after a few track burnouts this Summer. The wear is even although I did experience some camber wear in the the front tires. The key here to prevent this is to measure/rotate the tires at the recommended intervals as I did not rotate them until 9500 miles.

Given the price of the tire, a (Y)-rating, and wearing as expected; I'll likely buy another set.

These PS91's have lasted longer than the GY F1 Asymmetrical and Nitto NT05's and provide better dry and wet grip. I have 16,000 miles on this set and will be due for new set soon. This includes several AutoX's, 2 trips to the mountains , and a track day. Normally you have to give up so much to get a cheaper tire, not with the PS91's. The only thing the GY's and the Nitto had on these is the those had a little stiffer side walls. I'm definitely glad I gave them a try.

Great tire! Money, bang for the buck or not this tires stand out as well as the P-Zero & Pilot Sports. I took a shot putting these on the rear of a DINAN M5 and they hook very well. Impressive to say the least.

I will revisit my rating once I have more driving experiences. I will say that they are a marked improvement over the OEM Pirelli P Zeros. The Pirellis would hop whenever I slowly backed out of a parking space and or turn sharply going forward when I exited a parallel parking spot. This behavior stopped with the new Kumos. The price point is exceptional compared to its competitors. So far, very happy with my purchase.

I did try a launch with them. Traction was awesome, stayed hooked up for the whole stretch of highway . Ride is very comfy for a muscle car. They look awesome also.

Replaced a set of Bridgestone S04s with these tires. While I quite enjoyed them, they simply didn't last anywhere near as long as the Pole Positions. Granted I was very impressed with the longevity of those tires as I got 20k miles out of them, including 2 track days.

I put a one track day on these tires early on in their life, and they didn't hold up nearly as well (lots of chunking). This most likely accelerated the wear process significantly as now, 6500 miles later one of the tires has had the the outer tread completely separate from the carcass, requiring that I replace them.

These tires were very good on the street, and I imagine I could have gone 10k miles if I hadn't tracked them. They were comfortable, quiet, and responsive. Considering the S04s aren't that much more though, and they lasted so much longer even with more abuse, I will most likely be purchasing those again.