Kumho PS91
 

Time to get new tires for the Z and saw some good, although not a whole lot, of reviews on this tire. Anyone have these on their Z that can provide some input on them? Visually, the tread looks a bit like michelin PSS. Much appreciated :tup:

Does look like a nice pss clone. Be interesting to see if anyone has actually tracked them to see how they really stand up.

They aren't designed for track use so I wouldn't give the opinion of anyone who bought those tires for that purpose much consideration.

Well the pss aren't made for track use either but can still see occassional track days so that would put it in the same catagory at least I think they both fall in the same (max performance summer).

There is far more to a tire than just tread pattern. The tire construction and rubber compounds are very important for performance.

I'd go with the Bridgestone RE-11. It is a well proven tire.

The last set of Kumho tires I had were not very good. They worked fine on my truck, but not on my Z.

thanks to all for the replies! forgot to mention, this will be for spirited DD, tire may see 1 track event per year, maybe.

Right. I am aware it's not just tread pattern, the compounds used are much more important than anything else that's what I was leading to when wondering if anyone has actually tested them as a max performance tire.

As for DD use, the RE-11 has great wet weather performance but these tires are not intended for cold weather use. Yes, they will drive in cold weather but the performance drops way off once you get below 40 degrees. San Jose shouldn't be a problem.

I highly recommend that you check out the Kumho tire you are inquiring about at TireRack.com. They have very good reviews and I consider it a must visit site before selecting tires.

Tires are expensive and a bad tire on a good car makes for a bad driving experience.

Yeah, tire rack is the way to go, its just that there arent much reviews for the tire just yet. However, i did see a Z owner giving it about 4 stars, i think!

interesting, several good reviews(not many miles though) treadwear is 260 vs 300 MPSS,,,might be a contender..their about $100 cheaper per tire,,something to condsider.

The re-11 may be a good tire but it's also a bit of overkill for a dd tire. I mean a r comp pure slick may be a great summer tire and have awesome grip but will you really notice it driving down 101?. I would say you don't need an re-11 unless you are actually going to track otherwise you will never see it shine and will just wear out quick for no noticeable enhancement.

I am looking at these tires for my DD after I wear the P zeros that came on it. Personally, I take tires very seriously and before buying my DD I was researching the replacements available :) and found Kumho to be one of the options available when tire change due. I think the current reviews are promising, and found other reviews from Europe and Australia to have same impressions.

It may not be the best in category but it may be pretty good for the price, will know with time about long term use as they are new in market.

Don't forget the S-04 Bridgestones. To me, this is the perfect DD tire. Still works pretty well in the cold. Dry and wet traction is VERY good! Quiet too. Price is very reasonable.

I'm thinking I may go with the PS91 as well. I'm usually the first to say, "Buy once, cry once" but I've found that even some of the bargain bin tires can be used for spirited driving. My own personal experience with a off brand were the Fuzion Sport UHP tires and I've used them on the Dragon(US129) as well as Devil's Triangle HOWEVER that being said this is my first high horsepower application so I may just save up for the Mich PSS. My vehicle is not a track weapon, it's a DD with occasional spirited driving and once the fuel pump and oil cooler are installed, auto-x.

don't cheap out on tires...only thing between you and the asphalt. Im a Michelin man...gotta wear these OEM stones out first...:driving:

After trying Nitti Invo and Hankook ventus, I've had the most satisfaction from my S04s and will buy again. Unless I sack up for Pss

I just did my 2nd track day, first time with Michelin as3 and this time with s-04, Very happy with this tire. I still had track left to use on turn exit so now I'm not going fast enough for the new tires. Last time felt like a greasy bar of soap on the road. Would definitely buy s-04 again as a dual duty mostly street tire. I'll keep an eye on these kumho though as I've read kumho has put a lot of money into their r&d recently to start making some pretty competitive tires. My friend just bough some of their v720 tires that came in a very close 2nd place vs the 71r and they were dirt cheap comparatively.

I had the opposite experience. Never tracked but drive like i stole it on the streets. Had the AS3 and it hooked well from a dig all the way until hitting the wear bar. Swapped to the s-04 and instantly noticed the traction dropped (reminded me of ventus evo). The tire size of the s-o4 also measure smaller compared to other brands with same size. Looked kinda goofy and off on my stock height z

Streets don't equal track in the least (I doubt you'd ever even see a 3psi increase on street). S-04 may be slightly less width (very slightly at that) but overall surface area is going to be more with the solid contact patches. Also when you have individual blocks like the as3 they squirm against each other causing the tire to overheat and become slippery.

The s-04 vs the as3 is not even in the same league.

Tell why I was able to run 12.9 on my stock Z with the as3 and my best with so4 was 13.1 on the drag strip? Btw I went multiple session/days with both tires

Lol, .2 is not much of a difference considering, track and environmental conditions. Also, he is talking about tracking on a road course which is significantly different than running at a drag strip. I have not as3 and would never think of it for my application, but I have run s-04 and they perform very well for a tire in that category.

No need to get your competency challenged as your track times are as fast or faster than many with better tires than the two that are being debated.

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So straight line time now equals good handling? Interesting, those top fuel cars must be amazing on a road course then.

You run so4 with your TT? No wonder why people online are laughing at TT Z cant break the 13s

I never tracked the Z, but know as3 perform better than off sized so4
Don't go half a$$ with a subpar tire for tracking. Step up to the supersports or re11 for that

You are hell bent on being right and can't even take compliment when it's given. I, like jhill don't drag race and yes I had s-04 on when the tt was installed, and no I don't run them now, I run re-11 for street and r888 for track days. That being said, there are more positive reviews on s-04 than as.

By the way pss don't compare to re11's on the track.

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Car is 99% street driven so s-04 suits my needs better for my level at the track right now. I'll maybe get another set of wheel and tires when I progress but right now it's not necessary. Can give any of us a f1 car and put an f1 driver in a stock z and gen would probably still smoke us all.

Also the s-04 is the competitor to the pss, the pss gets better overall reviews but it is very close on all reviews and cost a lot less. While I can't speak personally as I didn't try the pss but from some who have used both the s-04 seems to keep its grip better throughout its lifespan where I have heard the pss starts to degrade about 1/2 life.

They need to re-evaluate their budget, because the v720's are having catastrophic delamination failures on all types of cars. And this is happening on autocross courses.

PS91's are a decent tire for the money. A friend of mine was running them this summer on his 330ci. He was an instructor at Gridlife this year at Road Atlanta. I went for a lap with him and felt that the tires did pretty good from what I could feel in the passenger seat. He has had nothing but good things to say about them.

Comparing a Max Performance Summer tire to a Ultra High Performance All Season tire is comparing apples and oranges simply because they're both round in shape. A much more fair comparison is the Bridgestone S-04 vs the Michelin Pilot Super Sport.

**** he just got his today. I'll warn him to watch out for it I guess.

That's what I was saying when he is arguing the as3 outperforms the s-04 regardless of how much info says otherwise. And yes the s-04 was night and day vs as3.