Just wondering if anybody is running 255/40/19 on their stock 19x8 wheels, instead of the stock 245/40/19.

2 org members have told me it would work just fine. Discount tire mounted 255 on my car, front and back, and it did not rub at all. I did not drive the car, but they turned the steering wheel all the way to the left and all the way to the right to make sure there was no rub.

I will like to know if there is any 7thgen with 255 tires. I would appreciate to see some pics, if any. Or just your thoughts on what you think of 255 on the 19" rims.

 

That size is no problem on the 7th gen. I have 255-35-20's with a O.D of 27.02. The 255-40-19's have a O.D. of 27.04. I always try to go wider than stock.

 

do you guys think i might run into some troubles running 255/35/20 on some 20x9 wheels because i have the eibach springs? or should i go with the 245 width instead?

 

The 255 is only 5mm wider on either side of the rim. Your wheel offset may be a factor. Mine are 20x9 with a +38 offset, but I am not lowered.

 

67whitegoat, this is my concern...

I have a 6thgen with the 7thgen wheels. 19x8 with +50 offset and I wish to put 255/40/19 on the rim. From tirerack and 1010tires, the recommended rim width for that tire size is 19x8.5. But I am trying to put the 255 on the 19x8 rim. What do you think?

gordoe, I don't know what to say about yours. I will guess people who have eibach springs can best say something about that.

 

PeetitFrere, the 255 is no problem on the 8" rim. I run 245-45-17 on a 17x7 rim on my 4th gen.

 

After a lot of research on the net, I have found some calculators that could help a lot of people in deciding on tire sizes for their different rims. Some people might know 1, 2 or all of these calculators, but I am guessing a lot of people might not know, hence, I choose to post in the hope it helps a lot of people and also, people can send a link to others who might need this assistance in choosing what rims and tire would fit their cars. Here they go...

Use this simple calculator at first for diameter comparisons - Tire size calculator

Use this calculator for comparision and "Rim Width Range" for different tires - Tire Size Calculator - tire & wheel plus sizing

Use this calculator for calculating spacer/offsets - I love the tire rack offset/diameter calculator BUT..... - BMW 3-Series (E90 E92) Forum - E90Post.com

And use this to to sum it all and make the final decision on what rim and tire to mix match on your car - http://www.bigcustomwheels.com/rt_specs.jsp

These are some great tools, guys. Let me know if it helps you.

 

BUMP...

Anybody knows anybody who is running on 255/40/19 on their stock 7thgen 19" rims? I would be glad to know.

 

I would be interested in knowing if anyone is to. I need a thicker tire on my car with these potholes in CT.

 

In my search on the web, have found some other cars with stock 19x8 using the 255/40/19 with no problems. Checkout links...

http://www.grrrr8.net/Forums/showthread.php?t=9691 check posts 7 and 8

http://forums.chicagovw.org/viewtopic.php?t=9992 the whole thread

http://rl.acurazine.com/forums/showthread.php?t=499021 check post 17 and 25

http://www.g35nyc.com/forums/showthread.php?p=543248 post 1

 

what about 255/45/19 have a offer on ebay for a pair want to know before i accept the counter offer please let me know or email patrick.2.clarke@sprint.com

 

Your giving up sidewall for a slightly wider tire, sidewall is what protects the rims from potholes.

Just a random question, whats the benefits of the 255/40 over the 245/45, on tire rack, it looks like I have less tires to choose from, and the prices on average are slightly more, some tires, a set of 4 will run me an extra 100 bucks

 

feel free to not use any of the links that have been posted

 

I reviewed the info above i apologize i am at work maybe i missed something but everything i saw was in regards 255/40/19 I just wanted to verify on 255/45/19 just to be on the safe side i apologize if i upset you

 

I have not verified if the 255/45/19 will fit the stock 19x8 conveniently. But I have searched the net extensively, since I posted this thread. And I can conveniently say that the 255/40/19 would fit the stock nicely and perform fine. This is totally based on my own research and having discount tire test-fit a Yokohama Advan S4 255/40/19 on my car.

The size you are talking about, 255/45/19, does not seem to be a good fit. I used all the calculators I know and they show it will give you a big difference from your OEM setting. And using this one, - http://www.bigcustomwheels.com/rt_specs.jsp, it stresses you have to double-check to make sure you don't rub. If you ask my advise, I will say I don't think it is a good choice. But remember, as owners of our cars, we make our own final decisions about what we do to our cars. So, it is totally up to you what you wish to do.

I want 255/40/19 because the tire I want, Yokos Advan S4 is in that size and cheaper than other tires I would consider in the 245/40/19. Also, I think the 255 does not really make a difference compared to the 245, so, one can choose any one. Hence, if I find a cheaper price on what I like in the 255, I will buy it.

Some examples of cars that I have seen with 19x8 rims using 255/40/19 tires are some Pontiac G8 which comes with 19x8, some Audi with 19x8, Acura with 19x8, BMW with 19x8. All these, I found on different forums and it is working great for these people.

As for this thread, remember, we are talking about the stock 7thgen rim 19x8.

 

From a brief bit of research over at TireRack.com . . .

All of the 255/40 tires I looked at come with a mfr-recommended minimum rim width of 8.5". That's actually a Tire & Rim Association standard of sorts, meaning that while it's possible that you might find a couple of 255/40 tires for which an 8" wheel width is listed as being acceptable, it's not generally recommended.

Actually, a 245/40 is the widest 40 profile tire that you should mount to 8" wide rims. My guess - Nissan's combination was chosen with ride quality in mind.

A 255/45, on the other hand, is OK'd generally for fitment on 8" wide rims. The extra sidewall height is probably what makes it more tolerant of narrower wheel widths. Whether that size works for any particular car is, of course, a separate matter.


The more I see of these "tires on just-barely-too-narrow wheels" posts, the less trustful I am about tire to wheel width suggestions made on internet fora such as this one. They may be well-intended, but there clearly has not been enough research put into them. Nontechnical criteria such as appearance or "gut feel" should never count for more than technical adequacy or mechanical correctness. Yes, you can get the tires to mount and hold air. But unless this is for a show car or for extremely short time durations of each use there's more to it than that, and it's this other stuff that's more important.


Norm

 

I am going to put 255/40/19 on my 7thgen wheels. I have seen enough 19x8 rims with 255/40/19 on them.

More links of cars with 19x8 rim wrapped with 255/40/19...

http://www.audiforum.ca/audi-a6/54883-rolling-19-s.html

http://gallery.me.com/tamasv#100022

http://www.nycnissans.com/showthread.php?t=651

As I find more, I will update thread. Or if anybody here has 255/40/19 on their stock 7thgen 19x8, please, post.

 

You have obviously done the research, whats holding you up from actually putting them on

 

What is holding me is the fact that I have these Goodyear RSA on my car with 9/32 tread and wish I could sell them to cover the cost of my new tires. Basically, my current tires have more than 85% life left on them and I wish I could get someone to sell them to. That would help offset my cost for the new tires. If I had enough resources lying around, I would buy the tires and sell these later. But not right now. But if I find a buyer, I would put my new tires on within 3 days of meeting a serious buyer.

 

Completely understand, I will be letting the RSA wear down before putting on some nice Yokohamas

The GoodYears are fine tires, my only dislike is I feel certain bumps way more harsher then Yokohamas I have owned, but on my 06 the RSA got me 40k before I opted to put new tires on, I could have went another 10k but the proneness to hydroplane was becoming more frequent, hopefully I can get 30-40k out of these 19's

Im a conservative aggressive driver, I love to drive but Im not one for spinning the tires everytime I take off and screeching the tires around turns

 

You do drive like me then. And for my original 18 that were on this car, I got 32k miles out of them and sold my rims and tires wuth thread still on the rims. So, I know I can get atleast 30k from these 19s too. But that means I have to drive on these tires for a very long time. And I really do not wish to.

Tell me what you think about this deal I got.

4 tires in 255/40/19 Yokohama Advan S4 for $880 drive out. OR
4 tires in 255/40/19 Federal SS595 for $500.00 drive out.

Which would you pick?

 

Right off the top I would go with the Yokos, every replacement tire I have purchased has been a Yoko, every time I go to my tire guy he ask me if Im working for them yet.

My 06 I put Yoko Avid W4S on it and they where great tires, probably drove way harder on them then I should of, the things where great, great tires in the rain, heavy down pour high speed highway driving, things stayed glued to the road like it was dry.

I tend to not skimp on my car especially tires, I searched and the Federals look like track tires, don't know if they would really hold up to 20000 plus of daily driving, or am I looking at the wrong tires.

880 for the yokos is awesome, I would do it, those tires are gonna cost me 950 atleast for me Yokos it is

 

I bet Yokos would be better. And the Yokos I am looking at are all season, while the Federals I am looking at are summer and directional tires.I have never had summer tires on my cars ever in my life. Always loved all seasons. Maybe I should give the summer tire a shot this time.

The yokos have a tread rating of 400, while the federals 240. So, yes, I bet it would give about 20000. But I can make it 30000. But for sure, Yokos would give one 40k plus.

 

Well, I went by a tire warehouse and supplier to tire shops here in houston to have a look at the Federal 255/40/19 SS595. Here are some pics.

 

 

 

Very nice, guess the 500 was too sweat a deal to pass up

I look forward to your short term and long term reviews

 

Got to bump this again to see if someone has ventured and done this. Would be nice to know.

 

I had the 245/40/19 on my SV Sport and wanted to go wider. So I went with the 255/40/19 Hankooks. I was told that you can run these and I also have the Eibachs Pro springs and there is no rubbing. If I had to do it again I would go with a 35 series version as the sidewall on these is a little soft. But they sure fill out the wheel well nice.

 

It is interesting to finally find someone who has done this. I am going to PM you now for pics, lol.

Correct me if I am wrong. You have the 255/40/19 on your stock 19inch (19x8) wheels, right? For I am thinking that is what you mean. And that is exactly what I have been looking for. And I bet a couple of people here would be glad to know for sure.

Share with us a little about ride quality and if any buldge. Compared to the stock tire size of 245/40/19 on the same 19x8 wheel.

 

A 255/40 tire is not supported quite as well laterally as a 245/40 tire when mounted on the same 8" wide rim, so that is to be expected. The bigger tire may also be slightly less responsive (think "softer" cornering behavior here) even if it ultimately generates the same or higher cornering force.

FWIW, it is not recommended to run a 255/40 on 8's by the people who make tires anyway. Nor 255/35's, for that matter. But with 255/45's there is just barely enough sidewall to accommodate being squeezed down onto such a narrow rim (relative to the tire width), so that would be "do-able". Profile matters here.

Of all the factors that go into properly fitting tire sizes to specific rim widths, wanna-be appearance reasons rank right down there at the bottom.


Norm

 

When I went to price these tires I first went to America's Tires. I told him I was interested in the 255/40/19 to replace the 245. He looked it up and on his calculator it showed that these tires fit no problem. I then went to another tire store where I did purchase and the guy there said the same thing, no problem. Like I said, next time I will go with the 35 series as the 40 adds a little more sidewall height and these are a bit softer than the Potenzas I used to have. But you can't beat the price, almost half the price of the RE050's and they get better reviews.

 

Hey Glenn,

What Hankook model did you go with? I'm thinking about the Ventus V12 Evo, read nothing but great reviews about it plus it's at a great price point for a performance tire. Also from reading several reviews Hankook's feel soft but still turn in good numbers, I'm not certain a 35 series would make much difference with Hankook.

http://www.caranddriver.com/reviews/...mparison_tests

http://www.tirerack.com/tires/tires....s+V12+evo+K110

 

Understand that the tire sales guy is out to make a sale, so he'll tend to go outside the tire mfr recommendations out of simple fear that if he doesn't, somebody else will. That doesn't make it right, or even a particularly ethical way to act; it simply happens. If the guy had tire engineering in his recent background, he wouldn't be trying to sell to create "out of spec" combinations.

That said, it's not a pass/fail situation. But you absolutely are sacrificing something out of whatever margine of safety is built into the tire. Do not assume that said margin is so huge that you can ignore giving up any of it.


It gets a little frustrating when people try to argue (or agree) that it's OK to do something that is technically poor practice (at best). Your salesman for starters, in this case.


Norm

 

[quote=Norm Peterson;7880084]Understand that the tire sales guy is out to make a sale, so he'll tend to go outside the tire mfr recommendations out of simple fear that if he doesn't, somebody else will. That doesn't make it right, or even a particularly ethical way to act; it simply happens. If the guy had tire engineering in his recent background, he wouldn't be trying to sell to create "out of spec" combinations.

That said, it's not a pass/fail situation. But you absolutely are sacrificing something out of whatever margine of safety is built into the tire. Do not assume that said margin is so huge that you can ignore giving up any of it.


It gets a little frustrating when people try to argue (or agree) that it's OK to do something that is technically poor practice (at best). Your salesman for starters, in this case.

First of all, I am not taking a tire salesman advice. He showed me the screen showing the compatibility of my rim to this tire on their website. I don't think they would recommend this size on this rim if it was unsafe. Second of all, the place where I bought my tires is a very reputable and the most successful tire shop in southern ca. They don't need my business as I had to stand in line for 30 minutes just to talk to someone. I was told that this size tire works fine and have yet to talk to anyone in the business who say's that it is unsafe. As a final word, the tires look just fine on these rims and don't bulge or look unnatural.

 

Just for grins, Glenn, I looked up the specs for your specific size Hankook tire at Tire Rack. I only found the Ventus V12 evo K110 (Max Performance Summer) model (http://www.tirerack.com/tires/tires....=yes&tab=Specs, so I am assuming that is what you have).

Here are the specs as listed there, reformatted for easier reading.


Size . . . . . . . . . . . . . . . . 255/40ZR19
Max Load . . . . . . . . . . . . 1764 lbs.
Max Inflation Pressure . . . . 50 psi
Tread Depth . . . . . . . . . . 10/32"
Tire Weight . . . . . . . . . . . 29lbs.
RIM WIDTH RANGE . . . . . . 8.5-10"
Measuring Rim Width . . . . . 9"
Section Width . . . . . . . . . 10.2"
Tread Width . . . . . . . . . . 8.7"
Overall Diameter . . . . . . . 27.1"
Revolutions per Mile . . . . . 768



Here is some of the same data, taken straight from Hankook's own site - this is the only tire model that is available in your size at the time the page was posted - I checked all of the performance passenger car tire models (http://www.hankooktireusa.com/Produc...um=2&FnCode=02 . . . you'll have to hover your mouse over the V12 tire and click on the size option in the menu that pops up)

255/40ZR19 XL
8.5-10.0
27.0
10.2
8.7
10.0/32
768
1,764


I have no idea what website your sales guy was using, but it does not match up with Hankook's data. He may (otherwise) be a good salesman, but to my way of thinking it is irresponsible to work outside the mfr guidelines for the product that he is selling in order to make a sale. He's no engineer, which is the background most helpful in understanding this matter, so I'm not holding my breath waiting to hear that he provided any explanation regarding the compromises that are involved.


Of all the fora that I either currently am or have previously been active on (over a dozen), this one (maxima.org) has the highest overall level of insistence about fitting tires to rims that are below the recommended minimum width. It's no different here in 7th Gen now than it was in 5th Gen eight to ten years ago.



Norm

 

Norm is perfectly correct. I have personally done soooooo much research about this. And out of ALL manufacturers websites I have been to, no one carrying 255/40/19 recommends it to be used on a 19x8 rim.

Norm, let me ask you something though. Have you ever gotten a chance to look at these 255/40/19 tires? Yokohama Advan S4, Yokohama S drive, Federal SS595? I have seen all 3 and put side to side, the Federal SS595 "looks wider" than the Yokohoma Advan S4. Seriously. I mean that different manufacturers might label their tires as 255/40/19, but if you put some of them side to side to each other, I promise you, you would see one is wider than another. That is how I figure I could conveniently put the Yokohama Advan S4 on my car with no issues.

BUT, and I say BUT, though we all are not Engineers here, some people do things that are not exactly by the book. They might not be necessarily safe-proof according to the Engineers, but some modifications do work fine. Besides this tire selection, we have people here that totally mod their cars in other ways that an Engineer would say; "That is not safe!"

Glenns25, do you have pics? Post a couple or email pics to me and I would post them. Or if you want to text the pics, text them to me and I will post. How is ride quality compared to stock tire size? Any different?

Oh, and I just thought I should mention that I don't have the full proof, but there is an Audi model that comes from factory with 19x8 wheel and 255/40/19 tires. I found that somewhere on the internet. I will see if I can get proof of this.

 

Thanks for covering my six . . .


Tires do vary somewhat either way from the "advertised size", and there actually is some sort of allowed tolerance. I'd heard 7% before, but couldn't find it. Today, I found this, and while it's not particularly about car tires, it is at least indicative of TRA thinking on the matter of tire dimensional variation.
Just as there are some tire makes/models that tend to "run small", there are also tires that "run big" or "run wide" relative to the nominal sizing.

The bottom line here is that the nominal size is just that - something to call a tire that conforms (approximately) to the numbers being called out. It is not in any way intended to be an exact dimension, whether that be the precise design dimensions (as measured on the "measuring width wheel") or what the tire measures out at when mounted on any particular width wheel.

I will give you that for a tire that "runs small/narrow" it becomes easier to justify dropping down just below min-width. The problem over the internet is that there will be people who will take that mention as being blanket permission to mount anybody's 255/40's on 8's. Even the 255/40's that run wide. And then there will be somebody who thinks that going another half inch narrower on the rim or another 10mm wider on the nominal tire size will still be a "good enough fit" . . .



Yes, some modifications do work fine without being "safe-proof" (and I won't publicly list what some of mine both automotive and non-automotive have been). But for full-time mission-critical parts like tires you should be taking a more conservative approach with respect to function than you would for most other modifications.


I'd be interested.

I looked briefly and found this . . . http://allroadfaq.com/content/wheelstires.shtml . . . which lists one 18 x 8" wheel with 255/40's.
The ???'s are for missing information about offset, bolts, and weight - this is really a wheel site, so it may not have official Audi approval. When you go to the Goodyear site for the GS-D3 in that size, it still lists 8.5" - 10".



Norm

 

even though this is probably a late reply i have 235 40 18" nitto neo gen bouuht 2 new federal 595 and there is a big difference in width they look like a tire size bigger but i like them and the price i couldnt complain there a smooth tire

 

Reviving my thread. Anybody done this yet? I know of one 7thgen owner with the 19x8 stock wheels who went with 255/40/19 to replace the 245/40/19.

I will be replacing my 245/40/19 with 255/40/19 sometime next week on my own 7thgen wheels. Will definitely post pics here. Replacing stock Goodyears with Yokohama Advan S4.

Some interesting reads of cars with stock 245/40/19 who replaced with 255/40/19 and it is working great for them. Interesting read...;

http://forum.grrrr8.net/showthread.php?t=9691&

http://forum.grrrr8.net/showthread.php?t=14876

http://www.g8board.com/forums/showthread.php?t=26214

http://www.g8board.com/forums/showthread.php?t=41349