Runflat tires on a coupe?

Bmachine

Bmachine

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I have access to a set to 205/55/16 Continental ContiProContact SSR tires which are runflats. I am thinking of putting them on my Style 5 wheels.

I understand that the runflats have stiffer walls. Would this noticeably affect the ride on a coupe? I went with the 16inch wheels because I read a few comments on other threads saying that the 17 were a little too harsh, especially when mated with 45 aspect ratio tires.

Any thoughts?

Thank you.
 
If you get the Roundel all I see are complaints about the run flats. Stick with Conti Extreme Contact DW tires on 16" wheels, I like them.
 
We had run flats on the wife's X5. Horrible tires, tracked all the irregularities in the road, bad ride. Discount tire traded us on a set of Pilots I think at no charge. The guy said everybody complains about them
 
No need for run flats with a full size spare. Our 2014 X3 has run flats and was designed to run them. Tire tech has evolved so the new run flats on new cars are no different feeling than on the 2007 X3 that runs regular Nokians.
 
My first thought when I read the title was the walls are too stiff and will create a very unpleasant ride and unnecessary abuse to the chassis/suspension. We have been using runflat tires since 2003 and I have learned quite a bit about the technology. One of the key elements to making the tires is substantially reinforcing the side walls and adding a gel material that helps dissipate heat. All that also adds weight which increases rebound. Our coupes really aren't designed to handle all this abuse.
 
OOC raises the issue that would concern me the most. The e9 was designed for 14 inch wheels and German roads. Moving to 16 inch wheels means transmitting more of the road surface vibration and harshness into the structure of the vehicle, and our road surfaces are very poor. Run flats would compound this problem.

Recall that some of the newer BMWs are experiencing structural metal fatigue failures because the computer simulations BMW used to evaluate the useful life of the metals were based on German road surfaces. (In the US, only 2/3 of our roads are in good or very good condition). Our cars are not nearly as stiff as the newer BMWs, but the metals in them have already experienced lots of metal fatigue.
 
Based on a random, statistical sample one, ME, I would argue that only 1/3 of our roads are in no better than "good" condition. Drove the PA Turnpike from Philadelphia to Harrisburg. They should pay me for driving it. Horrible condition then, Sept. imagine what it will be like after winter is finished with it. Steve
 
oneills said:
Based on a random, statistical sample one, ME, I would argue that only 1/3 of our roads are in no better than "good" condition. Drove the PA Turnpike from Philadelphia to Harrisburg. They should pay me for driving it. Horrible condition then, Sept. imagine what it will be like after winter is finished with it. Steve
Click to expand...

I avoid the PA pike as much as possible, besides they are raising the tolls yearly until 2044. To pay for the lack of maintenance. :twisted:
 
also you cannot mount Runflats on just any wheel . The wheel's have a different lip to keep the tire on . That being said you can mount any kind of tire on a runflat wheel
 
bdigel said:
also you cannot mount Runflats on just any wheel . The wheel's have a different lip to keep the tire on . That being said you can mount any kind of tire on a runflat wheel
Click to expand...

Great point. Some run flats also require a band that goes around the center of the wheel which is what the deflated tire rides on to give more support.
 
I'm pretty sure I once had XWX's that had an extra layer of protection.

If you can find the right size, there's always belt and suspenders "old school.":D

iu
 
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