Need an advice regarding performance tires. I am getting my GCSRT8 in a few weeks, since it comes on four season tires I wanted to ask what are the best performance tires to put on it for the maximum road handling and breaking.

Thanks in advance:)

The stock tires are fantastic. They are assymetrical treads with outstanding performance capabilities. I hardly see why you would want to upgrade NEW tires, but hey, it's your money to waste. You'll be lucky to gain a few feet in breaking performance and/or skid pad performance.

I'll explain why I'm so concerned with it. I had some unwanted expirience with fourseason tires and secondly i've read some tests on GCSRT8 VS RANGEROVER SPORT, range rover appeared to have a better breaking performance, in the end they explain that it is so because of the tires, range rover has summer tires on it, so the grip is better. I don't really mind about the money that I might spend on new tires for my GCSRT8, but I want to exploit it to its limits, so the breaking performance is important to me. However just wanted to know your opinions regarding the best performance tires I could possibly find on the market.

thanks for concern

Understand that if you replace the stock tires for performance tires, and you get a flat you're SOL!

Stock tires are run flats, and no spare included with the GC SRT8. But, I have seen others with Toyo Proxies, and they are not run flats, so, I guess if you don't mind having you GC flatbedded to the Goodyear dealer (and don't mind taking the chance that the moron will destroy the front facia in the process), then go with the performance tires.

Check out this link:
http://www.buywheelstoday.com/search/tires.asp

These are tires that will fit our rigs. The Goodyear F1 Supercar tires seem like they might fit your needs.

I have the Toyos, mentioned above. Not sure if they are really considered a performance improving tire, but I love them, and have had them on my cars for the last 4+ years. The proxes are always the tire that I turn to.

I'll explain why I'm so concerned with it. I had some unwanted expirience with fourseason tires and secondly i've read some tests on GCSRT8 VS RANGEROVER SPORT, range rover appeared to have a better breaking performance, in the end they explain that it is so because of the tires, range rover has summer tires on it, so the grip is better. I don't really mind about the money that I might spend on new tires for my GCSRT8, but I want to exploit it to its limits, so the breaking performance is important to me. However just wanted to know your opinions regarding the best performance tires I could possibly find on the market.

thanks for concern


Hey, it's your money to blow. I"m telling you, for a 5 foot decrease in stopping performance you are going to blow A LOT of money. It's not smart economics. Also, your cornering performance MAY or MAY NOT increase. With the stock tires, our trucks pull amazing skid pad performance numbers.

Also, what I find amazing is that you are basing this assessment on a REVIEW from a website. The margin of error will fall directly inline with the difference in stopping performance. The difference in stopping power between our trucks and a Range Rover is not a consistant variable that you can rely on.

What was the ambient temperature during the tests? What were the tire temps? Was the test completed in succession (boiling brake fluid)? Were the brakes on both vehicles correctly broken in? What type of surface were the vehicles tested on and was there any debris on the ground that may have impacted friction? etc.

I'm just trying to help you make a wise decision and perhaps offer a side of things you may not have seen.

LOLOLOL I love how you state, "It's your money to blow" followed almost immediately by "It's not smart economics." LOL...... like these cars are even remotely linked to anything smart economically. That was a good one :)

LOLOLOL I love how you state, "It's your money to blow" followed almost immediately by "It's not smart economics." LOL...... like these cars are even remotely linked to anything smart economically. That was a good one :)


Well, I'm not talking about the truck itself, just the replacement of PERFORMANCE TIRES with PERFORMANCE TIRES. I think too many people get hooked into this modding mindset that because it's stock...it MUST be replaced!! :p


Also, when you get down to it, our trucks are an incredible value. Show me another vehicle on the planet that I can buy for $46,000 that performs as well, has as much usability, and looks as good as our SUV's? You won't find one. :D

Oh I totally agree, but these vehicles are not a sound use of money, no matter how you look at it. But we all know that, and buy it anyway. Whether it's for the looks, the performance, or a combination of the two-- the vehicle is still a gas guzzling hog, though a fast one. I can think of tons of ways to spend 50K that are much more practical. Heck, I'm sure we could spend half that and get close to the same numbers, but that's beside the point.

Modding is modding. People spend thousands of dollars to shave tenths of seconds from their times. That's why I don't get why you'd try to talk someone out of spending a bit of dough to help out (even if admittedly minimally) with his stopping distance. *I'll also admit here that I have never heard of swapping tires in relation to stopping distance.*

It's all good. I just sometimes have a hard time understanding why people try and tealk others out of mods-- unless of course that mod comes from GSM ;)

Yeah I totally see your point. It's not so much as me trying to talk someone OUT of it, but just offering a different perspective. By all means, mod away! I was just trying to offer some advice and raise some questions that popped into my mind.

I'll explain why I'm so concerned with it. I had some unwanted expirience with fourseason tires and secondly i've read some tests on GCSRT8 VS RANGEROVER SPORT, range rover appeared to have a better breaking performance, in the end they explain that it is so because of the tires, range rover has summer tires on it, so the grip is better. I don't really mind about the money that I might spend on new tires for my GCSRT8, but I want to exploit it to its limits, so the breaking performance is important to me. However just wanted to know your opinions regarding the best performance tires I could possibly find on the market.

thanks for concern

If you want a better answer, you need to provide more info. What temp range are we talking about? What conditions (strip, road course...)

If you want a high performance dry weather only tire, look at the BFG t/a KDW (in 295/45 and 265/50 sizes)

So, what else are you going to do to maximize braking performance? And, what does "braking performance" actually mean to you? Are you running sessions on a road course? Is your fluid going to boil? Are you going to warp your rotors?

I don't think you need to worry about any of this stuff, but then again I have no idea what you're about to do with your GC.

Understood, agree, and appreciate it :)

Yeah I totally see your point. It's not so much as me trying to talk someone OUT of it, but just offering a different perspective. By all means, mod away! I was just trying to offer some advice and raise some questions that popped into my mind.

Goodyear all-season RFTs aren't (relatively speaking) high performance tires. I'm sure you could improve at the limit handling characteristics with a stickier compounded summer only performance tire like a Yoko Advan Neova or the Michelin PS2, although there aren't very many available in sizes to fit the SRT8.

Like everything else though, it's a compromise. What you gain in at the limit handling you give up in seriously decreased life, undriveability in snow or cold weather, loss of run flat convenience, and cost.

Alex

Hmmm....what about moving up to 275/40_20 & 315/35_20 in the Dunlop SP Sport Maxx RunOnFlat?

I would also throw in the fact that RunFlats are generally much heavier tires and that rolling weight/mass is much more significant than dead weight/mass. Lighter tires/wheels will = better acceleration.

The potential downside of using a softer compound (GY F1) for example (as other have mentioned here) is tread life. On my Z06 the F1s were generally only good for 8-10k (typical driving not drags) not to mention the fact that they got exteremly noisey the older they got.

-7

Yo people thanks for your advices, I'm really pleased with your concern. I will replace my stock tires anyway. Help me out to choose the best ones, so far I'm thinking about getting Yokohama's ADVAN ST, what do you think?

Can someone explain me what actualy means a RunOnFlat tire?

Thanks

Can someone explain me what actualy means a RunOnFlat tire?

Thanks
That means you can run on the tire for roughly 50 miles after you lose all air pressure in the tire because the sidewall is stronger than a normal tire. It's the alternative to a spare tire because the SRT-8 does not carry a spare. However, once you run on a run flat tire that has gone flat, you need to replace it.

People how do I find the sizes that I need, Yokohama hasn't got them, TOYO doesn't have them eather and another question: do I have to change my tires only on hte tires of the exactly same size (like rears we have 285/40 -> can I change them to 285/50 or 285/45 would that be ok). Should I put tires that are made specially for SUV or (because then Yoko's Advan Neova are made for sport coupes, I am not sure If my GCSRT8 will feel OK in them.)

Thanks

People how do I find the sizes that I need, Yokohama hasn't got them, TOYO doesn't have them eather and another question: do I have to change my tires only on hte tires of the exactly same size (like rears we have 285/40 -> can I change them to 285/50 or 285/45 would that be ok).

Use a utility like this (http://www.net-comber.com/tirecalc.html) to compare different sizes to the stock wheels. I'd be looking at two rules of thumb:

1- Like others have mentioned here before the front and rear overall diameter of any replacements have to be essentially the same. In the case of stock tires, there's about 6/100ths of an inch difference.

2- Any change to the original diameter is going to affect your speedo accuracy. Smaller diameter = higher reading than actual. If you're going larger (wider), you need to check with others on these boards for their plus sizing experience. Also bear in mind that diameter changes acts like a gearing change (a smaller diameter tire is going to need to turn the engine more to keep the same speed vs stock...)

As far as whether or not a performance tire is okay on our Jeeps, I'd look at max load ratings on the replacements, and compare them to the load ratings on the the stock Goodyears. I'd at least use that as a starting point, but my guess is that any tire in our sizes is going to be fine from this standpoint.

Alex







Alex

People how do I find the sizes that I need, Yokohama hasn't got them, TOYO doesn't have them eather and another question: do I have to change my tires only on hte tires of the exactly same size (like rears we have 285/40 -> can I change them to 285/50 or 285/45 would that be ok). Should I put tires that are made specially for SUV or (because then Yoko's Advan Neova are made for sport coupes, I am not sure If my GCSRT8 will feel OK in them.)

Thanks

go with 295/45 and 265/50. Why, you might ask... Once you have figured out all of the possible combinations (while understanding the need to keep front/rear diameters essentially equal), maximize your tread width. These are the sizes you'll end up with.

Toyo and (I think Hankook) make an all season tire like this, while BFG makes a summer only tire. This is all assuming you're deciding to forego the runflats.

Thanks again!!! Maybe someone knows what is the max and min ratio that I can put, and the same with the width(max and min)

I am going to be running my GCSRT8 on a road course in a few weeks. I know I am going to go through a set of tires so I was also looking at some replacements. I would like to go with something on the less expensive side and ones that I won't loss much performance. I was looking at the Yokohama Parada Spec-X 295/24 and 265/50. I am not concerned running without runflats since I will probably change them out shortly after the event. Anyone use these tires before? I really like the BFGoodrich g-Force T/A KDW 2 but the Yokohama's are $90 cheaper per tire..

What does a stock tire for this beast cost, front/rear difference? I'm all about the run-flat but can you put fix-a-flat in it in an emergency(if your farther than 50 miles from a tire shop). Are run-flats a normal stock item at many tire shops? Mind you I don't have a GCSRT yet but I will order a 2008 as soon as the dealer will let me. I have a deposit there for one as I was gonna get a 2007 but with the new features I decided to wait.

No, I don't think you can use Fix-A-Flat in run-flat tires.

And our tires are not normally kept in stock at most tire dealers, including Goodyear shops. Most need to order them, so if you have a major blowout that can't be patched you're SOL :mad:

However, our tires are covered for road hazards for the first year, so at least if you have a leak that can't be patched, you won't have to pay the $300 for a new shoe ;)

What does a stock tire for this beast cost, front/rear difference? .
$287 front, $308 rear. www.tirerack.com