Kumho PS91 Review - BMW M5 Forum and M6 Forums
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post #1 of 19 Old 7th January 2017, 07:10 PM Thread Starter
skruffy
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Kumho PS91 Review

Why didn't I buy pilot super sports? Cost was the main concern, with curiosity the second. I've had quite good luck with Kumho tires in the past. I purchased four 275/35ZR-18 PS91s from Tire Rack for $145.45 each, plus $74 in shipping, for a total of $581.80. I mounted them myself at a friends shop, but assume around $20 each to mount and balance if you're tallying up total costs. A casual check of Tire Rack's website shows Pilot Super Sport on sale at $227 each, so a total with shipping of $982 for four tires to my door. For $400 less per set, I was willing to take a chance on the Kumhos.

Big shout out to Tire Rack here, I placed my order at 4:41 PM and my tires were sitting at my door 2:59 PM the next day. With standard shipping. Amazing.

The PS91 look quite similar to the PSS, almost to the point of being a direct knockoff. The sidewall on the PS91 isn't as good looking in my opinion, but it's also not much different and probably not noticeable unless you were comparing them side by side. The tread pattern is very similar, but the PS91 is not directional. This is very much a plus for me as my car has squared wheels, allowing for tire rotations.

How do they drive? Very well. I would say on the road they're so close in performance to the PSS I'd have to drive them back to back on the same car to really get a feel for the difference. In normal driving I doubt you'd be able to tell any difference in noise or ride comfort. I can say that straight line acceleration traction is vastly improved, especially over my worn set, and turn in is slightly softer with the Kumhos.

tldr: The PS91 is a great tire for the price and a close knockoff of the PSS
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post #2 of 19 Old 7th January 2017, 08:54 PM
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No and a big ( NO),,,just 4 months and will tell the difference and you will say the word (NO)

Last edited by mubarak; 7th January 2017 at 08:56 PM.
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post #3 of 19 Old 7th January 2017, 09:24 PM Thread Starter
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post #4 of 19 Old 7th January 2017, 11:16 PM
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Quote:
Originally Posted by skruffy View Post
Why didn't I buy pilot super sports? Cost was the main concern, with curiosity the second. I've had quite good luck with Kumho tires in the past. I purchased four 275/35ZR-18 PS91s from Tire Rack for $145.45 each, plus $74 in shipping, for a total of $581.80. I mounted them myself at a friends shop, but assume around $20 each to mount and balance if you're tallying up total costs. A casual check of Tire Rack's website shows Pilot Super Sport on sale at $227 each, so a total with shipping of $982 for four tires to my door. For $400 less per set, I was willing to take a chance on the Kumhos.

Big shout out to Tire Rack here, I placed my order at 4:41 PM and my tires were sitting at my door 2:59 PM the next day. With standard shipping. Amazing.

The PS91 look quite similar to the PSS, almost to the point of being a direct knockoff. The sidewall on the PS91 isn't as good looking in my opinion, but it's also not much different and probably not noticeable unless you were comparing them side by side. The tread pattern is very similar, but the PS91 is not directional. This is very much a plus for me as my car has squared wheels, allowing for tire rotations.

How do they drive? Very well. I would say on the road they're so close in performance to the PSS I'd have to drive them back to back on the same car to really get a feel for the difference. In normal driving I doubt you'd be able to tell any difference in noise or ride comfort. I can say that straight line acceleration traction is vastly improved, especially over my worn set, and turn in is slightly softer with the Kumhos.

tldr: The PS91 is a great tire for the price and a close knockoff of the PSS
Wow talk about a Korean Knock off and even the naming is a knock off.

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post #5 of 19 Old 8th January 2017, 03:14 AM
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Is it really a thing to only replace the tires with michelins? They make a good tire but they are seriously overpriced. Michelins don't even come up in conversation when it comes to the best performance tires on market. Common choices for street/track tires are Bridgestones, Dunlop star specs, and Hankook RS3s (Korean). Not saying it makes sense to daily any of those models, but it illustrates the point that other manufacturers can make a quality tire.

I personally wouldn't bother spending 1000+ on a set of tires. I've been running Hankook Ventus V12 evo2s on my 525i for a few years and love them so I got a set for the M5 recently and it's the same story. They are quiet, they have excellent grip characteristics in the wet, and they maintain these qualities over their whole life. The four for the price of three deal didn't hurt either.

There are tons of great options out there and quality reviews from the magazines and tire rack. Shop around. I bet the OP's new tires will treat him well.
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post #6 of 19 Old 8th January 2017, 08:03 AM
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post #7 of 19 Old 8th January 2017, 08:14 AM
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For what it's worth, I've had a great experience with Continental Extremecontact DW tires on my 540i touring. Granted, it's no M5, but I am running the same tire sizes as an M5 on staggered M-Parallel wheels— 245 in the front and 275 in the rear. Super nice grip, great in the rain, and I even took them out on some snow when I visited the Grand Canyon a few days ago. Tire Rack had an amazing sale on them a few months ago, it was $116 a tire!

I'd never buy Michelin tires either, because they're way too expensive. I buy these older cars to save money, not to spend a fortune, haha.

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post #8 of 19 Old 8th January 2017, 08:17 AM
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I've been liking my Sumitomo HTRZIII, also quite a bit less expensive than the Michelins. I had Dunlop Star Specs on my M3, those were fantastic, but the new Z2 Star Specs seem to be even pricier than the PSS...

I like to see more options for tires being reviewed!

Last edited by Rittmeister; 8th January 2017 at 08:17 AM.
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post #9 of 19 Old 8th January 2017, 03:10 PM
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Quote:
Originally Posted by Cohny View Post
Michelins don't even come up in conversation when it comes to the best performance tires on market. Common choices for street/track tires are Bridgestones, Dunlop star specs, and Hankook RS3s (Korean). Not saying it makes sense to daily any of those models, but it illustrates the point that other manufacturers can make a quality tire.
Yeah, it doesn't make sense to compare an all around summer performance tire (PSS) with the TW200 SCCA street class rules driven summer tires most all of which are manufactured with 1/3 of the normal tread depth already gone. Quality has many aspects to it other than ultimate dry grip. If you want to go that route for daily street driving, definitely plan on being very careful in cooler temps and rain, etc, while wearing *far* faster than the supposed TW200 would imply. Besides, if Michelin wanted to make a tire in that class they could, and they actually do -- the BFG Rival S. Depending on the car, there are two choices for the best TW200 tire on the market for dry performance -- the Bridgestone RE-71R or the BFG Rival S -- as the SCCA solo nationals results show.

The PSS is a great "all around" performance tire for the street, particularly when you consider uniformity (mass, stiffness and dimensional uniformity) which is often lacking in some of those brands mentioned. I went through a number of ZIIs trying to get tires that wouldn't throw off 20+lbs roadforce numbers and shake at random speeds for example. PSS come out of low single digit numbers, consistently -- superb manufacturing quality.

The subject is moot at this point anyway since the PSS is an old design that is being discontinued. The PS4S will be on the market shortly although for 18" sizes it might be later this year before they're available.

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Last edited by CSBM5; 8th January 2017 at 03:10 PM.
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post #10 of 19 Old 8th January 2017, 03:43 PM
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I've personally had great experiences with Kumho tires over the years on a variety of different cars - thank you for the review on the PS91. Please keep us updated as to how the tires wear, particularly the rear.

I run the Michelin PSS simply because I wanted to see what all the hype was about. Still on my first set of fronts and my second set of rears (~14K total miles). Once it's time for all 4 to be replaced, I'll take a look at some other options before I pull the trigger on the PS4S. The PSS have been an outstanding tire and I have zero complaints, but they are spendy for what they are and for what I use the car for (normal driving with occasional jackassery).

- Darrell

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