Dunlop SP Sport 5000 DSST CTT 

I agree with the negative/very negative reviews of these tires. I had not felt safe with them, especially in wet weather. I experienced hydroplaning twice. In the first case on an Interstate Hwy when all 4 tires block loose at approx. 60MPH, and only regained traction when my offside tires slid onto the gravel shoulder. Otherwise the other reviews noted above, are spot on.
I had a set of Michelin Pilot Sport AS/3 + V rated tires installed yesterday, and drove home in a mix of sun and rain. Hallelujah, Hallelujah, I have a born again Infiniti. Smooth as silk, and goes where I point it effortlessly. I drove aggressively in both the wet and dry easily and predictably.
With the dreadful run flats, I only had 7 months protection from a tread puncture in any case, as I run snow tires the other 5 months (Canada, you know). I have also purchased a tire repair kit from Canadian Tire at $50.00 (Canadian). This is something I should have done earlier. The kit has a repair material that is TPMS friendly and can withstand the heat and cold of my trunk, and a car lighter generator capable of inflating the tires to full specs.
I recommend replacing these dreadful "run flats" as soon as possible, if only to experience the true capabilities of your car.

The stock tires for Infiniti should do better. While they're great for feeling like you're more powerful as they lose traction on startups, they're honestly dangerous in the wet. Any small puddle risks a hydroplane that the car's ASC tries to counteract, and turning almost always leads into oversteer. I don't feel comfortable or safe driving with these tires, which makes them immediately a no-go, would never buy again, and will steer friends clear of it.
On the livability of it, though, it's quite nice once warmed. The run flats tend to get flat spots when sitting overnight, but the vibration goes away after a few minutes of highway driving. However, at least one tire is causing vibrations regardless of warmth, and I can't wait to get new tires and rid myself of these ----awful things.
0/10. Don't bother.

This is the worst tire I have ever driven on. Infiniti should be ashamed for screwing over us car buyers. This tire has been used about 1 year, but only about 8,000 miles because I used winter tires for 5 months. They are already down to 5/32. Traction in rain is terrible, do not even attempt to drive in the snow or ice or you will end up in the body shop. The replacement cost of these crap tires is insane, almost $350/ea, at minimum! Do NOT buy these tires!

Garbage OEM tires. Amazed Nissan puts these on the Q50/Q60 RS 400. Mediocre dry performance, poor wet/snow performance, and the worst tread wear of any tire I've owned.

By far the worst tire I've ever driven on in my life. Bubbles form of you so much as drive over a pebble! They feel like bricks. Such a heavy tire makes the car perform terribly. These give me zero confidence when driving on a road with a little moisture! The whole car slides! I will pay to not have run flats on any future car I own. In 1 year and 15k miles I have gotten 3 bubbles on tires and 2 flats. I will be calling Dunlop customer service to ask for a part of the $1000+ I just spent on a set of Michelin pilot sport a/s 3. Can't wait to see how my car should have been driving all along! NEVER BUY THESE TIRES!!!!!

These came standard on my 2014 Q50S Hybrid AWD. I've had many years of experience with Nissan and Infiniti products, and they have started using Dunlop in recent years, but they always put awful tires on any type of "sports" sedan. So far, I have 26,000 miles on them and I'm probably going to be replacing once they hit 30k just because the snow/wet traction is not there once you hit about 10,000 miles. Luckily I got the Road Hazard protection on my car because I've had two flats and had to replace two of them already (I suspect a small leak in one of them at the moment, so that would make three). They are noisy, harsh, and very stiff. Wet traction is awful, this is a heavy and powerful car and these things have very poor lateral grip. Dry traction is fine and cornering on dry pavement is good, but that means nothing considering that even a bald tire will perform ok in dry conditions. Snow traction isn't terrible but for the price of this tire, you could get a Conti DWS Extreme Contact for half the price that would absolutely blow this tire away in all seasons...and when I get rid of these, those are what I am getting. Very disappointed that Infiniti would allow this garbage on one of their products. Stay Away.

So disappointed in my infiniti. My past 2 leaves with infiniti, well I did not have to change any tires from.beginning to end. With these tires, I replaced one this may due to the sidewall blowing out, and now its October and the other 3 are worn down and eont pass inspection. No way I'm paying $2000 for these tires. Ride was always loud and felt like the car was slipping on dry roads. Stay away.

Awful tires. Some of the worst I've ever driven on. Low traction in the wet, mediocre grip in the dry, rough ride, and noisy. The fact that these cost almost $500 a piece is a joke! Tires at half the price of this are so much better! I also have had trouble with sidewall blowouts as others have mentioned in the comments. Buy ANY other tire.

Tires came OEM with the Infiniti Q50S.
Cannot convey how hard these tires are. Comfort almost non exhistant giving harshest ride I have ever experienced.
My third Infiniti but first with run flats and cannot wait until the Dunlop's have to be replaced with non run flat tires.
Wonderful vehicle, but these tires and run flat capability really diminish joy of ownership.
To top it all off, the Infiniti came with run flats, but with a full tire jack and spare!

These tires were OEM supplied (Infiniti Q50) and I could not wait to remove them after only 8,300 miles and throw them in the garbage where they belong. I basically had a flat tire with a run flat tire from hitting a pothole on the freeway. There is no absorption capability with these tires and frankly you are more likely to hit a pothole then you are to run over a nail. Not impressed Dunlap team. In my opinion, these tires are unsafe for any driving condition.

Guys, I am sorry but I will only be able to write the truth. This is a piece of ---- tire that should never even be installed on factory fit from the company. Way too noisy, minimal comfort, it just destroys the experience of driving. Well, even for sportiveness, its not as responsive as one would think while accelerating. Does not provides any grip in little snow either. A punture in the tire is difficult to patch, and no local companies were willing to do it, so I ended up getting rid of them at 31K miles and getting the top rated Pirelli Cinturato P7 all-season plus. I will never buy the Dunlop Sport 5000 DSST CTT Run flat ever again. Well I am lazy too, but this time I had to write a review for this scum of the tires.

These tires are terrible, treadwear was ridiculous, below 4/32 prior to 15k Mike’s completely bald by about 26k miles.

It really is amazing how awful these tires truly are... if I was trying to make them somehow worse I'm not sure what I would do. Besides the harshness, noise, incredible wear rate (down to 7/32 at 10k miles), horrendous traction, and PRICE, the worst part of the tires is their ability to redirect your car along road imperfections. It feels as if there's some auto pilot trying to take over the car if the lane has any wear or grooves in it. Any kind of snow/slush/ice is just immediately dangerous. These manage to negate any AWD capabilities of the car. I cannot fathom how these tires are available for purchase, and pity anyone else who ends up stuck with them as their vehicle's original tires. Infiniti needs to wake up and realize the damage these tires do to their brand. The only saving grace of these is they'll wear out quickly so you can come back to this site and get some real tires. I cannot wait to get some Continental DWS 06's as replacements.

Background: My drive to work is about 25 miles each way. Stop and go traffic on some highways and more open lane on others. I took this car to the mountains on winding roads twice within the first 10K miles.

Result: my front tires were nearly bald on the outside, and this is getting them rotated and balanced every 5K miles. I had to replace the front tires after 10K miles and I just hit 20K in less than a year and have to replace all four now. I am going with a Michelin PILOT SPORT A/S 3+ (W- OR Y-SPEED RATED) tire. I live in NC and we don't get much snow, but when we do there is no plowing so and without a decent tire i cant use the full functionality of the Infiniti Red sport sport 400 AWD car.

Bottom Line: i don't see how this super expensive tire is recommend. Yes it is run flat, but other than that feature the replacement cost for a poor tire is unreal and the tire performance does not match the car.