Mostly ride quality and road noise!

 

just wait; it'll hit you at about 5k miles.

 

Or you can insulate the back end for about $150 (using my method) and then realize how much wind noise there is in a coupe until you have the windows adjusted properly. Other Vettes are now noisy to me regardless of the types of tires used (unless they are insulated of course).

 

Where can I find your method?? Thanks

 

No one has touched on the real reasons behind why they are so bad.
They handle like *hit due to the mega stiff sidewall.
They weigh quite a bit more than a regular tire.
To make matters worse the extra weight is all rotating mass.

 

*sigh* I am stupid, I thought I had posted it here already. But since I can't find it, I guess I haven't. Will try to do that tonight. Basically I use two insulations instead of one to make a triple layer insulator when they are put together. The first insulator is well known by people that have done the "Frost King" only version. Frost King is made for insulating duct work and has an outer foil layer along with a foam based insulator. It sticks really nice to anything you put it on (as long as no humidity can get to it). The issue is the foam will break down over time. No if, ands, or buts. So to help slow that down I use another foil based insulator that has bubble wrap attached to it. You put the sticky side of the Frost King against the bubble wrap of the other insulator and you get really nice noice reduction as well as a total heat heat shield. Plus it slows down the breakdown of the Frost King because you put the bubble wrap layer against all the surfaces of the inner tub. I can no longer feel heat (in the back of the ccoupe) from the mufflers or drive train even after a 500 mile 75 MPH constant drive. And the other effect of sound deadening is due to the fact that the sound goes from the body panels and tub to the air pockets in the bubble wrap which then has to transmit the energy to the Frost King foam and then back to the air in the cabin. After all that converting of energy, the sound is reduced greatly. I figure the Frost King only people will get 3 to 7 years out of the foam before it becomes dust. My way, I am betting I get about 10 to 15. And when the foam does turn to dust, I just have to lift the bubble wrap insualtion up and out and the foam is trapped. No mess clean up

 

Pro run-flat: You won't be stuck in the middle of nowhere with a flat

Con run-flat: Not many tire shops, including Goodyear shops will attempt to repair a run-flat for whatever excuse they give. I did notice that when I changed over from the GY run-flats to the GY F1 GS-D3, that it took two tire techs to wrestle the the run flat off the rim. Some tire shops are afraid they might damage the rim or the tire pressure sensor when dismounting the tire.

Pro run-flat: You can limp to the nearest tire shop with a flat. However, read again the above. What's the use if they won't touch it anyway.

I carry a can of sealer and a set of tire-plugs, tire plug tools, pliers, gloves, a small jack and a tarp when I drive any long distance away from home. The sealer will definitely damage the tire sensor but I'll exchange that with "getting outa Dodge" if needed. The tire-plugs will negate the given tire "speed rating" - damn that means I can't drive 150 mph any more.

The GS D3s non-runflats are definitely quieter and ride smoother than the run-flats. I noticed on a twisty road near home that they did not trigger the traction control as often as the runflats did. On an autocross course I was a lot closer in my coupe to the Hoosier tired Z06s than I ever was with the runflats.

I would seriously consider the next generation Goodyear runflat (the one designed for the C6) if and when they offer it in C5 sizes.

 

Well it is a give and take concerning the runflats. If you value self assurance that you aren't going to be somewhere with a flat when you least need it or expect it then runflats are for you. I have personally experienced the unexpected and had one of those staples that they put in fences end up in my tire. The pressure dropped to 0 and I was able to limp back home about 20 miles away. The leak was sooo bad that you could hear the air leaking out. Well, my wife just bought me a 94 vette for working on and learning about modding and the first thing I do is get a flat. That right there told me that I will keep the runflats , esp when you are trying to change it in Dallas during rush hr. What a PITA!! But as stated, the Non-runflats are quieter and stick better. They also weigh less which is always a good thing. Thats just more weight you have to move. Anyway, either way has its advantages. Enjoy the car though!! These cars make driving fun!!!!

 

Take a look at how Tire Rack (who sells them) rates them compared to their competitors. Scores are for Firestone, Goodyear, Kumho and Michlen in that order. (Sorry for the alignment. Did the best I could). The most damning ratings are in ride comfort (5.6) when all the others are over 8.0; noise where Goodyear scores only 4.5 and everyone else is 7.9 or higher and wear with Goodyear only scoring 5.2 and two of its competitors 8 or higher.

HANDLING RATING 8.30 8.00 7.60 8.70
DRY TRACTION 8.3 8 8.4 9
WET TRACTION 7.8 6.5 8.2 8.8
SNOW TRACTION N/A N/A 7.1 7.3
RIDE COMFORT 8.2 5.6 8.3 8.3
NOISE COMFORT 7.9 4.5 8.4 8.1
WEAR 6.9 5.2 8.3 8.1

 

Uh, you must have missed my post. Each runflat tire weighs 6 lbs more than its non-runflat equivelant.

...a couple of additional facts:

1. Many tire shops will tell you before they work on your runflats that they cannot guarantee that there will be no wheel damage when they install new runflats. It does take two techs to install one runflat.

2. Goodyear says that the speed rating of its high-performance tires is retained after one plug and one plug only.

 

My run craps is noiser than my Borla stingers.

 

I dislike the fact that I don't have traction until third gear with the runflats.

Mark

 

Runflats are scary in a sharp corner-never know when they will let loose ! I have not pushed my car because of them. Michelins in my near future !

 

source???

It's the same entry-level material sold by Cascade; its just repackaged and in a different width.
You don't want to use it outside where it would be exposed to the elements... which includes door panels.

and after 20 years... what will be your new "guestimate" ???

the vunerable part is indeed the foam, but it doesn't see even air.. let alone the elements. On one side it's adhesived down so there is no element penetration... and the other side sees foil.

Sure; if you take a piece of it (or any type of these products) and subject it to the elements, it may start to break down. But in the car, it's not used in this manor - nor will it ever see the elements.

The manufacturer says it's good up to 180 degrees. The foil/bubble sheet that works so well for heat insulation is also only good to 180 degrees (if there is no air gap).

I don't know where you're getting the info on the FK; but the FAA approved it's useage on private aircraft - aluminum fuselage types - well over 10 years ago:
http://www2.roversnorth.com/roversno...ser/26508.html

 

I find no problem with my runflat tires on my O3.

 

Heck, they even use in on airplanes:
http://www2.roversnorth.com/roversno...ser/26508.html

 

i did not care too much about runflats before....i got yokos now, and the difference is amazing...i am sure other tires are much better than runflats....

 

I aslo had the YOKOS AVS SPort on mine and they were Bada$$!!
Once I had a slow leak on the tire and it was nearly flat.

Who needs the "runcraps" .....The YOKOS sidewalls held up pretty good, and I made it to the tire shop just fine.


"RUNCRAPS"=
"YOKOS" =

 

I agree with napacruzerc5. You use the sealant and ruin a tire sensor if you're absolutely desparate--cost $50-$100 for a new sensor. But how often are you really going to get a flat? Most leaks I've seen are slow and you can easily get the tire to a tire store.

 

I had a brand new 03 coupe with the GY runflats and from day one they were so noisey and rough riding it was actually painfull. I now have an 04 coupe with the redesigned GY runflats and there is no comparison the new design is very quiet and much smoother riding. The new design is actually as quiet and smooth as the Yokohamas I replaced the GYs with on my 03. I don't know if they will stay smooth and quiet as time goes by but for now I am very pleased with them.