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Discussion Starter · #1 ·
I went to the Tire Rack site and got as much information as I could about the 225/55R 17" all season run flats. Those of you who are getting the 19" tires are going to have to do your own research.:D

They listed four tires:

1)Bridgestone Potenza RE 960 A S Pole Position RFT:
Ultra high performance All Season
Rating: 400 AA A
Warranty: Treadlife: 5 yr/40,000 miles
Uniformity: 1/32" wear 1 yr
Workmanship and Materials: 5 yrs; 3 yrs free replacement
30-day buy and try
Road Hazard: None
COST: $195

2)Goodyear Eagle LS 2 Run Flat
Grand Touring All Season
Rating: 400 AA
Warranty: Treadlife: None
Uniformity: 2/32" 1 yr
Workmanship and Materials: 5 yrs; 3 yrs free replacement
Road Hazard: None
COST: $231

3)Continental Conti Pro Contact SSR
Grand Touring All Season
Rating: 400 AA A
Warranty: Treadlife: 40,000 miles
Uniformity: 2/32" 1 yr
Workmanship and Materials: 6 yrs
Road Hazard: 1 yr
30 day trial
COST: $187

4)Bridgestone Turnaza EL 42 RFT
Standard Touring All Season
Rating: 260 AA
Warranty: Treadlife: None
Uniformity: 1/32" 1 yr
Workmanship and Materials: 5 yrs; 3 yrs free replacement
COST: $289

Anyone looking at this comparison can see the worst value, based solely on the figures. NOW, GUESS WHICH TIRE IS LISTED AS THE OE ONE!:mad:

Not only is it the worst as far as "value," it is universally panned as having lousy treadlife(obviously, based on the rating), being very loud and stiff, and with the worst traction in the wet. It makes me wonder if the person in charge of picking the tires for Infiniti might be getting a kickback from Bridgestone.:(:mad:

If I have to have run flats on the car(with no space for a spare in the hybrid, that's a given), I will refuse to take those OE tires.
The other Bridgestones are cheaper, have a better treadlife and a better warranty. AND, the reviews were much better than the Turanza. I hope I don't have to hassle too much with the general manager to have them changed out before I finalize the deal. I'm sure that I'll have to pay a little extra, but since the Potenzas are less expensive, it shouldn't be much of a difference(just labor).
 

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Where did you see that the Turanzas were the standard on the Q50?
The specs call for "performance all-season tires", which the Turanzas don't seem to be, and this pic from the factory shows Potenzas:
 

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Discussion Starter · #3 ·
That's a picture of the 19" tire, but I hope you're right. Of the four tires that were listed, only the Turanza was indicated as an OE tire. Again, I hope you're right, as I don't want the tire(or the hassle.):eek:
 

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I kinda doubt thats the 19" judging by the spoke of the wheels
 

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That's definitely a 17" wheel running a Potenza RE-XXX tire. (The sidewall is too tall to be a 40-series.) Since the Q is a world car the tire fitment here doesn't necessarily mean it's what we'll see in the U.S., however.

The good news is at least we're not looking at a Turanza. I agree with you guys about those tires. My '02 Altima 3.5SE came with those dogs. Terrible tire.
 

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run flat ride

Hopefully the runflats will ride nicely. I have never driven on them before, but have gotten away from european cars do to so many low profile tires/stiff suspensions. I know the sport will ride a bit stiffer with 19's but I'm crossing my fingers!
 

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Never had run flats before and really not looking forward to OEM Bridgestones of any type anymore.:(
 

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Never had run flats before and really not looking forward to OEM Bridgestones of any type anymore.:(
I believe you say that because of where you live. Here in Vegas where it stays over 110 for about 6 months out of the year only 2-3 months of cooler weather the stock bridgestones are extremely sticky and handle amazing albeit a lil noisy but that's they trade off for great handling sticky tires ....
 

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That's a picture of the 19" tire, but I hope you're right. Of the four tires that were listed, only the Turanza was indicated as an OE tire. Again, I hope you're right, as I don't want the tire(or the hassle.):eek:
Look at the rims, those are the 17"s. The 19's are Dunlaps.
 

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Run-flat tires- pros & cons


Tires that can maintain their shape and can be driven on for 50 miles or more with no air in them are becoming increasingly common on some new vehicles. More than just a convenience item, run-flats can add a degree of security by eliminating the need to change a tire in bad weather or dangerous roadside areas. But their stiff sidewalls can deliver a harsher ride. And some owners have complained of premature wear and high replacement cost.
 

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2018 Infiniti Q50S Silver Sport
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This week my wife had and un repairable issue with the OE RFT Dunlap 19" @ 7,100 miles. The $ was ridiculous to replace 1 rear tire. $418.00 out the door. The Dunlaps are actually made by Sumitomo. What gives with the golf ball texture on the inside sidewall ? Weight reduction? I dont think the Dunlap RFT 19"s
89475
89476
ride that bad. But it killed me to replace it with so little miles on it. I had RFT Continental Sport Contact 5 SSR Run Flat tires 225 / 45 R 18 91Y w/ OEM Star & 255 / 40 R 18 95Y on my last BMW M-Sport. The ride was good and lasted 22,000 miles each time. RFT's are great for piece of mind while traveling. You could spend less than 1/2 the $ on the Conti's and keep the RFT. This is my first ever try of the RFT Dunlap tires. I'm hoping to get 20K out of these. Am I dreaming ?
 

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This week my wife had and un repairable issue with the OE RFT Dunlap 19" @ 7,100 miles. The $ was ridiculous to replace 1 rear tire. $418.00 out the door. The Dunlaps are actually made by Sumitomo. What gives with the golf ball texture on the inside sidewall ? Weight reduction? I dont think the Dunlap RFT 19"s View attachment 89475 View attachment 89476 ride that bad. But it killed me to replace it with so little miles on it. I had RFT Continental Sport Contact 5 SSR Run Flat tires 225 / 45 R 18 91Y w/ OEM Star & 255 / 40 R 18 95Y on my last BMW M-Sport. The ride was good and lasted 22,000 miles each time. RFT's are great for piece of mind while traveling. You could spend less than 1/2 the $ on the Conti's and keep the RFT. This is my first ever try of the RFT Dunlap tires. I'm hoping to get 20K out of these. Am I dreaming ?
I purchased the wheel and tire protection insurance from Infiniti. We had a blow out at 80MPH after hitting a large pothole. Obviously without a spare we had the car towed after driving to a safe place. The tow truck driver told us he towed or changed tires on several cars all from the same pothole.

There is a give and take with RF’s. Unfortunately a few very active members on this forum don’t express both the pros and cons of RF’s. The truth is often difficult to find.

The tire was replaced for no cost at a Infiniti dealership. $485
 

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The Dumbflop RFTs are rated the worst RFT for their harshness, noise, tramlining, wet traction and propensity for sidewall failures. If you want RFTs for your peace of mind while driving, you should consider another manufacturer.

The Dumbflops have a UTOG rating of only 260 for treadwear so they won't last very long. You may get 20,000 miles out of them but many haven't They also have a "B" rating for wet traction so their wet coefficient of friction is lower than an "A" rated tire and my personal experience with the Dumbflop mirrors that poor wet traction performance.

If you haven't reviewed other Dumbflop user's experiences on Tirerack's website, you should do so. They have rated it "Unacceptable". Many of the reviews are from other Q50 owners.
 
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If it was my driver I would have plugged it and drove for a week or so. Or longer if no issues arose. Then bought (4) of Conti's. But, when the wife's ride breaks and you just do what you need to. If they make 20k I will be surprised. I can't complain too much because my last (2) sets of Mickey Thompson Steet Comp lasted I think 7,100 and 7,500 on my Mach-1.
 

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20K seems pretty unlikely and as Avedis mentioned there have been endless poor review of those tires and most of the forums would recommend you shelves them, I'd personally drop the RFT's and get a spare installed some dealerships will offer that service but there is also a DIY guide on the forums if you are interested.
 

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I have a 2017 Q50 RS 400 with the original Dumbflops. I'm at 28k miles and counting. I'd say 75% highway and 25% city driving with a lot of tire tread left. I live in MA so I get all sorts of crazy weather and haven't had any issues with the tires. I once had a slow leak in one of the tires and found a nail. I plugged it myself and still going strong. Would I buy the OEM tires again no, but I can't justify spending around $1600 for a new set of RFT's until I get full use out of these.
 
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