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-   -   Yet another Run Flat tire question/dilema! (http://www.bimmerfest.com/forums/showthread.php?t=649653)

Deutsch100 10-03-2012 10:51 AM

Yet another Run Flat tire question/dilema!
 
My 2012 Rolls Royce Ghost (BMW F01/F02 based) has Made in Germany Goodyear Run on Flat tires. While they are better than most run flats, on certain roads there is, to me, an unacceptable level of "thump thump thump", tire noise and some vibration.

I called my RR dealer, and they told me that while some customers swear by these Goodyear Run on Flats, the vast majority hates them. I am considering taking a chance on getting a flat, and installing non run flats. My dilema/question is.....

My car has Rear 285/40 R20 and the Front has 255/45 R20. There are many, many choices for the front, but basically no easily accessible rear options besides the run flats.

The dealer and our local tire shop said it is fine to install 295/40 R20 on the Rear, instead of the 285. On rare occasions they said an Audi or BMW's stability control light gets "tripped" by installing slighter wider tires, but in most cases there is no issue.

Tire shop said the 295/40 R20 tires will make my RR softer, quieter and smoother...BUT, the non run flats will wear quicker, due to the sheer weight and size of my car and that the Run flats have increased sidewall support and the non run flats do not! Also, they said the non run flats might not handle as well around a turn at higher speeds (makes no sense to me!).

The only real option for non run flats are Continental DWS. Continetal tires are roughly $240. Goodyear Run on Flats are about $500 each.

Advice, opinions?? Would you just keep the factory Goodyear run on flats or try the Continentals?? Thank you!!! :)

Leslierc 10-03-2012 11:13 AM

My Pana came equipped with 19" Continental tires...only other experience with Continentals was with an `85 Audi...so far so good. The ride and handling with the Continentals are quite good. For the record, I had absolutely no problems or complaints with the Goodyear run flats that were on my 750ix.

Deutsch100 10-03-2012 11:28 AM

Quote:

Originally Posted by Leslierc (Post 7111245)
My Pana came equipped with 19" Continental tires...only other experience with Continentals was with an `85 Audi...so far so good. The ride and handling with the Continentals are quite good. For the record, I had absolutely no problems or complaints with the Goodyear run flats that were on my 750ix.

Thanks Leslie. On almost every Mercedes I have had, had Continentals. No issues. The few cars that I've had, that had Michelins.....I loved them! No Michelins available anywhere near what I need for the Ghost!

Deutsch100 10-03-2012 11:36 AM

Leslie...How many miles did you get out of your Goodyear Run on Flats in your 750? Did they seem durable, long lasting??

pranavf01 10-03-2012 11:53 AM

I have Continental Run-flats on my 750i and i hate them!! it feels so rough on the backroads and i can feel huge thump,s when i am changing lane and i go ove the small radium yellow markers. I had s550 with Michelin non run flats and they were soo much more comfortable

Leslierc 10-03-2012 11:55 AM

Quote:

Originally Posted by pranavf01 (Post 7111321)
I have Continental Run-flats on my 750i and i hate them!! it feels so rough on the backroads and i can feel huge thump,s when i am changing lane and i go ove the small radium yellow markers. I had s550 with Michelin non run flats and they were soo much more comfortable

The ones on my Pana aren't the run flats. Apparently, Porsche won't put run flats on any of their vehicles.

Leslierc 10-03-2012 11:59 AM

Quote:

Originally Posted by Deutsch100 (Post 7111285)
Leslie...How many miles did you get out of your Goodyear Run on Flats in your 750? Did they seem durable, long lasting??

I know you're going to hate me...I sold the car with about 11K on the odometer and the dealer who purchased it agreed with me that the tires were barely worn. It strikes me that you may be in the same position I was in regarding my 7 Series in that you have multiple cars to drive. I find this type of situation to be of some benefit and salvation when it comes to achieving good gas mileage and preserving tires!:)

jprescott 10-03-2012 12:10 PM

When I switched out of my S550 to the 7 Series I was horrified by the bumpy ride and road noise. I replaced runflats with non runflats and am blown away by the difference. If I had known about this I would have chosen the A8. Next time around I hope I have the option of non runflats with a spare. Some people don't seem to notice this but the vibration and noise really bother me

My vote is to go non runflat. You will be pleased. I keep a $20 inflation kit in the trunk for piece of mind

Deutsch100 10-03-2012 12:11 PM

Thanks Leslie! 11k miles and barely worn...that's great. I had about 16k on my Range Rover with Michelin Latitude Sports...and I needed 4 new tires...and the Rover was 17 months old.

Deutsch100 10-03-2012 12:19 PM

Quote:

Originally Posted by jprescott (Post 7111359)
When I switched out of my S550 to the 7 Series I was horrified by the bumpy ride and road noise. I replaced runflats with non runflats and am blown away by the difference. If I had known about this I would have chosen the A8. Next time around I hope I have the option of non runflats with a spare. Some people don't seem to notice this but the vibration and noise really bother me

My vote is to go non runflat. You will be pleased. I keep a $20 inflation kit in the trunk for piece of mind

Thanks! But, was your replacment non run flats a direct same size? I am wrestling with the "what ifs', with putting on 295's instead of the 285 the wheels dictate! I SO, SO want NON run flats, but putting the "wrong" size kinda freaks me out. Do you think it's ok, no issue?

jprescott 10-03-2012 12:45 PM

Can't help you there. I'm sure your local gear head or wheel/tire guys know.

ChrisF01 10-03-2012 01:10 PM

I'm surprised RRs are equipped with run flats, I didn't realize BMW's fanaticism with them trickled over to RR.

I got rid of mine the first week of driving mine home, our roads out here are not as bad as they are on the other coast.

I remember going to New Jersey and was driving a Lincoln Towncar rental, and even in that boat of a car, I was surprised how bad the roads were in/around Trenton.

Individual750LI 10-03-2012 01:22 PM

Do it, here is a solution for you. J/K. :D

http://farm6.staticflickr.com/5238/7...88391b9c_z.jpg

http://farm8.staticflickr.com/7252/7...a5fb6f83_z.jpg

jprescott 10-03-2012 01:46 PM

I hope that's photo shoped?

InTraffic 10-03-2012 02:53 PM

Rof pos
 
Quote:

Originally Posted by Deutsch100 (Post 7111180)
My 2012 Rolls Royce Ghost (BMW F01/F02 based) has Made in Germany Goodyear Run on Flat tires. While they are better than most run flats, on certain roads there is, to me, an unacceptable level of "thump thump thump", tire noise and some vibration.


[snip]

Advice, opinions?? Would you just keep the factory Goodyear run on flats or try the Continentals?? Thank you!!! :)

I would not keep the Goodyear tires. I am having a host of problems with my 2012 BMW 750i xdrive that includes what I call "double dribbling" over expansion joints, frequent imbalance problems (seemingly related to the tire's inability to stay fixed on the rim) and other imperfections. The dealer blamed two sets of Goodyear LS run-on-flat tires. I have not at all heard that some owners "swear by" the Goodyear LS ROFs. I have heard only that owners swear *at* them. Now, in the interest of disclosure, my 750i xdrive is also suffering from the vibration problem and the pulling to the right. In their efforts to correct those problems, they have blamed the ROF POS tires. I'm not sure I agree the ROF POS tires are at fault for those maladies. However, not to hijack the post . . . my response is to dump the ROF altogether and find room for a mobility kit or space saver spare. However, I would not go with a different size on those rims. As sacrilegious as it sounds, you may have to go with different rims to install different size tires. I don't suggest changing the tire size. Changing the width of the tire can be dangerous and may cause the tire to stretch across the rim, I'm told. Changing the height can change your speedometer and odometer readings and may cause your tires to rub on the inside of the wheel wells. Just my two cents.

Deutsch100 10-03-2012 03:16 PM

Quote:

Originally Posted by Individual750LI (Post 7111529)

Done! Awesome!!! :rofl::cry:

Deutsch100 10-03-2012 03:20 PM

Quote:

Originally Posted by InTraffic (Post 7111757)
I would not keep the Goodyear tires. I am having a host of problems with my 2012 BMW 750i xdrive that includes what I call "double dribbling" over expansion joints, frequent imbalance problems (seemingly related to the tire's inability to stay fixed on the rim) and other imperfections. The dealer blamed two sets of Goodyear LS run-on-flat tires. I have not at all heard that some owners "swear by" the Goodyear LS ROFs. I have heard only that owners swear *at* them. Now, in the interest of disclosure, my 750i xdrive is also suffering from the vibration problem and the pulling to the right. In their efforts to correct those problems, they have blamed the ROF POS tires. I'm not sure I agree the ROF POS tires are at fault for those maladies. However, not to hijack the post . . . my response is to dump the ROF altogether and find room for a mobility kit or space saver spare. However, I would not go with a different size on those rims. As sacrilegious as it sounds, you may have to go with different rims to install different size tires. I don't suggest changing the tire size. Changing the width of the tire can be dangerous and may cause the tire to stretch across the rim, I'm told. Changing the height can change your speedometer and odometer readings and may cause your tires to rub on the inside of the wheel wells. Just my two cents.

Thank you. The tire shop did bring up the speedometer/odo issue. I really love my 20" Factory chrome wheels (and they were about an $8800.00 option!!! :-o ) I would keep the POS run on flats, before I changed to 19" wheels, factory or aftermarket, just to change tires!

f01driver 10-03-2012 04:40 PM

I'm a bit shocked as well that the Ghost would have run flats because it must surely hamper the ride quality, I wonder if BMW put run flats on the Phantom as well.

I have Pirelli run flats on my car which have been decent but I know if I went with normal tires the ride would vastly improve.

NickyBlack 10-03-2012 05:52 PM

my runflats keep getting claimed by potholes. 2 new fronts in the past 4000 miles. My driving is the same, i hate these things. Never used to have any issues with regular tires and alot of my cars were on aftermarket 20" wheels.

InTraffic 10-03-2012 08:44 PM

Damn Germans married to their dogma. They are married to run flats even if their customers hate them. Seriously, they are giving the car itself a bad name.

Deutsch100 10-03-2012 09:55 PM

It looks like I can special order NITTO non run flat tires, that are an exact fit for the Rolls. The tire shop said they are a excellent handling tire, but do not last very long....and Mustangs and Camaro drivers love them :-0

Individual750LI 10-04-2012 11:40 AM

NITTO 555s? I hate them!

Deutsch100 10-04-2012 03:19 PM

Quote:

Originally Posted by Individual750LI (Post 7113629)
NITTO 555s? I hate them!

It's odd...the ONLY Nitto tires that are the size of the Rolls Royce, are listed on their website as Truck/SUV. I have a feeling, I like my Goodyear Run on Flats more than Nitto tires. Nitto has very, very mixed reviews!!!:yikes:

f01driver 10-04-2012 03:44 PM

I would personally stick with the Goodyears.

Deutsch100 10-07-2012 05:03 PM

Quote:

Originally Posted by f01driver (Post 7114120)
I would personally stick with the Goodyears.

I think you are very right!!!! ;)


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