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Discussion Starter #1
Ok,
i got my new bridgestone potenza s-03's on in the 255/45 size all around.
The tires were 46psi warm when i got home. I noticed a marked loss of grip and a lot of pushing of the front end around corners so I reduced the psi to 32 warm. After that I tested them....still an unacceptable loss of grip in my opinion and same pushing aound HARD corners ( i only have 60 miles on them) .
My question to all the gurus out there, Does a new tire need time to break-in to achieve max potential and should I be experiencing this amount of performance drop from a new tire....or do they just suck???????
If time is all that is needed how many miles does it take????
Thanks for your help!!!
If I don't end up keeping them anyone want a cheap set of tires????????
-moldy

Oh yeah the ride is much better and quieter though!
 

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I cant say I am a guru, but I went Goodyear GSD-3's. 285's in the rear and 255 in front. Run them at cold temp of 35psi. I had em wheel hop the first day but have not had a problem with them since.... and quieter and smoother ride.

If there was a break-in, it was one day.

they dont have quite the hold 'feel' that the run flats did, but that has just been a 'feeling'... but when I have been on the switchbacks up to Big Bear or Lake Arrowhead doing 65-85+ on the 20-25mph curves she has not let go on me at all.

Oh ya, I dont turn off the traction control as much as I did on the run flats.

livingthedream........
 

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My experience only, but give them 200-300 miles. I had the same experience with new GS-D3s and similar experiences on many other performance cars with new tires. A bit of patience, my friend. Let us know.
 

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New tires always need a few miles to get all the surface shmoodle burned off. But I can also tell you that running 32psi on a tire that not only has a 45 series sidewall but is even taller because it has a 255 width, you will never like them. Any non runflat sidewall is going to be softer than the F1 RFT unless it's a competition tire. So you are going to need to keep those babies pumped up to have any shot of getting close to the handling of the stock F1s.

I will also say this. People seem to love the number 255. It sounds so much better than 245. BUT, as you increase the treadwidth by 10mm, you are also increasing sidewall by almost 5mm. Which means a slightly softer ride. Also means a potential loss of control because the rim width has not changed. Whether it handles better or not at that point is going to depend a lot on the tire itself. And if you're going from the F1 RFT to a non-RFT, it will almost certainly feel worse.
 

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livingthedream said:
I cant say I am a guru, but I went Goodyear GSD-3's. 285's in the rear and 255 in front. Run them at cold temp of 35psi. I had em wheel hop the first day but have not had a problem with them since.... and quieter and smoother ride.

If there was a break-in, it was one day.

they dont have quite the hold 'feel' that the run flats did, but that has just been a 'feeling'... but when I have been on the switchbacks up to Big Bear or Lake Arrowhead doing 65-85+ on the 20-25mph curves she has not let go on me at all.

Oh ya, I dont turn off the traction control as much as I did on the run flats.

livingthedream........
Are those sizes on a stock rim?

If so can you give out the exact specs of the tire? 285/??/18
and
255/??/18?
 

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Moldy,

Give them a few miles to break in. I had them before the Michelins and they take a few hundred miles to "break in ".

Shane
 

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I'm going to sound like a scratched vinyl record and I will seem to sound like the article from Car and Driver is my tire bible article. Also, I know my boy BigJim is going to debate that these tests won't apply to us V owners unless the tests are done on our cars.

However, there's a reason Car and Driver placed this Bridgestone Potenza in 9th place. Wait, this is the S-03. The tire in the test on Car and Driver is the RE050A. I don't know how much difference there is because I haven't researched the Potenza's. Either way, the mag had this to say about the RE050A. "Geswein said it felt dull and disconnected and that it was somewhat soft and imprecise when driven hard."

Hope this helps. :D
 

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S-03 is a great tire... you wont regret getting them. Give them a few hundred miles to break-in... 500mi would be ideal. In the dry, they'll outhandle the GS-D3s... should be very close to the F1 supercars.
 

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Give 'em some time, they'll settle in some;however, the sidewall increase isn't a handler's friend. The 255/45 tire will allow some wallow, you can help this by running higher pressures...try 35lbs cold, and go up until it doesn't improve.

The S03 is a great tire, but somewhat dated now. In it's day, it was the best street tire available....very good in the rain, too.

Next time, go 255/40 and you'll be very happy. Good luck.
-ace
 

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Hoping I'm not stating the obvious but running different tire pressures front to rear can help reduce the amount of understeer. Moldowan complained of push at 46psi. The reduced tire pressure to 32psi. Was this on all 4 corners?

Crispy
 

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Ok, <bowing> asking forgiveness from all. I misquoted the sizes of the GSD-3's. Looking at the receipt, front is 245/45ZR-18, rear is 275/40ZR-18 on stock rims. Running at 35psi Says Goodyear F1 GS-D3 VSB

Apologies for misleading anyone. Just misread what I had done.

But hey, after cancer, with a trache in my throat and not being able to eat solid food for 3 years (we pour in G-Tube style) , I still can smile each time I turn the key.... so I will ask for a little slack.

Anyway, that is the skinny right from the receipt.

livingthedream:bigroll:
 

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VELOSE said:
I'm going to sound like a scratched vinyl record and I will seem to sound like the article from Car and Driver is my tire bible article. Also, I know my boy BigJim is going to debate that these tests won't apply to us V owners unless the tests are done on our cars.

However, there's a reason Car and Driver placed this Bridgestone Potenza in 9th place. Wait, this is the S-03. The tire in the test on Car and Driver is the RE050A. I don't know how much difference there is because I haven't researched the Potenza's. Either way, the mag had this to say about the RE050A. "Geswein said it felt dull and disconnected and that it was somewhat soft and imprecise when driven hard."

Hope this helps. :D
I'm not debating the GS-D3 as being a good tire, because it most definitely is. I bought a set for my SHO 2 years ago.

All I'm saying is that if you want max dry performance, you need to step up considerably in the stickiness of the tread compound or find a tire that has VERY stiff sidewalls to offset the loss of lateral stability when leaving the RFT realm to a non-runflat. I can't state this enough...obviously.

I have always respected Car and Driver for their accurate and fair reporting. But how many cars are there on the road that come with stock runfalts? Very few. This test was made to be about a generalization to get a good idea of what each tire would most likely do on most people's cars. Car and Driver even points this out in their comparo. Here's a quote:

"A tire, like most parts of a car, is a compromise. Make it great in the wet, and it more than likely sacrifices dry performance, and that's why we didn't come across one tire that was able to ace all the tests.
Still, there are countless other variables for tire engineers to consider. For example, the construction of that inner carcass can be made stiff for precise feel or compliant for a good, comfy ride. And the construction can have a marked effect on performance.
Don't forget noise, durability, and appearance considerations, too. It's enough to make us glad we're not tire engineers."


They tested a non-RFT RE050A. Most people would look at this test looking at a non-RFT RE050A. If you want to ignore the fact that our Vs aren't like most cars, and you want to feel all squidgy with the C&D comparo, then by all means, do so.

I do want to point out that the RE050A got the highest marks for cornering stability in this chart: http://www.tirerack.com/tires/surveyresults/surveydisplay.jsp?type=MP

Many of the surveys left for the RE050A were actually for non-RFT models. But many were.

I'm not trying to sell the RE050A to anyone. I've never even driven on them. But, what I am saying is that there is more to our Vs then just slapping on the tire one comparison says is best. That is an added burden with owning a V. Throw in the fact that we have an undertired, heavy sports sedan and that makes this even more critical. Our V was the FIRST application for the F1 Supercar EMT in 245/45 18 size. Goodyear produced it for us. Every other CTS comes with a spare. We have a spare tire well. There are other 245/45 18 tires on the market. I strongly feel that the RFT was made primarily for handling stability. It's a very important factor. Going to a non-RFT, unless decreasing the sidewall size by going to a 19" wheel or getting a competition tire, is always going to be a step down in handling ability.
 

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Well I called FIRESTONE today and they said its not a problem they have a 30 day refund policy if your not happy with the ride. So there ordering me the goodyear f1s' and putting them on for the price difference.
I was very happy with this- good company- for a change:2thumbs:
-Moldy
 

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moldowan said:
Well I called FIRESTONE today and they said its not a problem they have a 30 day refund policy if your not happy with the ride. So there ordering me the goodyear f1s' and putting them on for the price difference.
I was very happy with this- good company- for a change:2thumbs:
-Moldy
Ask them if they would sell me the take-offs. I need a new set of tires and would gladly buy these with just a few miles.

[email protected]
214-529-4279
 

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BigJim,
I agree with you on the fact that the tires used on the tests done by C&D might not directly have any relevance to how they would perform on our cars. However, their tests do give us an indication of what those tires tested will do on cars designed to use those types of tires. Also, it's a good guage on how all those tires if RFT's or not, compare to one another. This is the only reason why I feel "squidgy" with this article as my guide.

I hope moldowan made a good decision with the GS-D3's. He'll be the one to prove if the article has any relevance in terms of comparison. ;)
 

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We def. had to break-in our tires too.

Buy now, I really like them alot, esp. in the wet.

But, I don't run super high, pressure, as the ride gets a little old, and since I've not tackled a Road Course yet, its not an issue.

The F! def. had a "tighter" feel on turn in, but you adjust.
 

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CTSV05 said:
The F! def. had a "tighter" feel on turn in, but you adjust.
Yeah, you do adjust. When I got the Dunlops on(a phenomenal rain tire BTW) I liked how the V was a little more "tossable". I still think it's a great tire and it does score better than the S-03 in the TireRack comparo(all non-RFT). However, after doing a track day and a couple autocrosses, I'm getting itchy for the ride on rails feel again that the F1s gave. The winter will probably quell that itch for a few months. But I am having my stockers widenedand will try RE050As, 245/45 18 on the front and 275/40 18 on the rear, all RFT. Fun, fun, fun!
 
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