How much of a difference is there???

I know a place where i can get a full set for $400 all seasons, NEW..

I have had these tires on just about every car I have ever owned and love them...

Once I get an answer I will let you know...

About an inch shorter than stock...25.8" vs. 26.7" for stock.

any downsides?

The tires i have used quite a bit and absolutely love!! are the nexens N3000. I get them from a guy on ebay and he has always come through really well!!

How much of a difference is there???

I know a place where i can get a full set for $400 all seasons, NEW..

I have had these tires on just about every car I have ever owned and love them...

Once I get an answer I will let you know...

Those are about an inch shorter then what is on your car. You will throw off your speedometer and odometer on your car. This will also show that you did more miles then you actually did. Not to mention look funny with extra wheel well gap..

I like to use this website to checkout those answers.

http://www.miata.net/garage/tirecalc.html

When changing from the original tire size, the rule of thumb is no more than 2% smaller or 3% larger than the original diameter. Going outside these parameters could have adverse effects on the ABS, stability control and other electronic systems that base their algorithms on the tire rolling about 755 times per mile. Not to mention the speedo/odo will be off (will read 60 when actual speed is 58). Transmission shift points may be off, etc. you get the point.

In your case, the 245/35R19 is 3.5% smaller than the original tire, thus it is outside the accepted rule. In other words, it is advised not to use that size.

It's nothing a computer tune wouldn't fix for the different tire height.

It's nothing a computer tune wouldn't fix for the different tire height.

Even if you can do that (it's not possible on many cars), it doesn't change the fact that you've changed the rear diff ratio, and you'll be running higher rpms all the time, thus putting more wear on the engine and increasing fuel consumption. So the money saved on the tires, you pay for later with increased wear on the drivetrain and higher fuel costs. Nothing is free. If it were me, it's still cheaper to replace tires than engines. I wouldn't do it.

Even if you can do that (it's not possible on many cars), it doesn't change the fact that you've changed the rear diff ratio, and you'll be running higher rpms all the time, thus putting more wear on the engine and increasing fuel consumption. So the money saved on the tires, you pay for later with increased wear on the drivetrain and higher fuel costs. Nothing is free. If it were me, it's still cheaper to replace tires than engines. I wouldn't do it.

OMG are you serious? You think cruising at 2000 RPM instead of 1800 RPM is going to kill a motor? Hahahahaha.........:nuts:

i just don't know why you would want to create more wheel gap.

OMG are you serious? You think cruising at 2000 RPM instead of 1800 RPM is going to kill a motor? Hahahahaha.........:nuts:

Yes, I am serious. Are you saying increasing revs all the time doesn't wear an engine faster? Your engine never turns more than 2000 rpm? :nuts:

I'll concede that most of my experience has been with Japanese imports, which already tend to run higher rpms to begin with, so it would likely take much longer for any adverse effects to manifest on an 8 cylinder.

Regardless, if you have to pay for a tune to compensate for the new overall diameter and your fuel costs increase, where's the benefit of going with the cheaper, smaller tires? Overall, there is no cost savings. And there certainly is no performance gain with all seasons!

Main concern is that the 245/35R19 tire carries 1,433 lbs (max), assuming the tire is XL or reinforced. The rear axle is rated for 2,815 lbs, so the tire technically can be used safely but its really close. For safety, you'd have to be very diligent abount maintaining 36 PSI (cold) or higher ALL THE TIME to make sure the tire does not get to the point where it is overloaded and blows. The diameter is only 3.3% lower than stock, so ABS and traction control still should be OK (normally if the change is more than 5%, those systems may be affected).

If the tire does not have an "XL" or "reinforced" on the sidewall, you can't use it.

Main concern is that the 245/35R19 tire carries 1,433 lbs (max), assuming the tire is XL or reinforced. The rear axle is rated for 2,815 lbs, so the tire technically can be used safely but its really close. For safety, you'd have to be very diligent abount maintaining 36 PSI (cold) or higher ALL THE TIME to make sure the tire does not get to the point where it is overloaded and blows. The diameter is only 3.3% lower than stock, so ABS and traction control still should be OK (normally if the change is more than 5%, those systems may be affected).

If the tire does not have an "XL" or "reinforced" on the sidewall, you can't use it.

Interesting....thanks for this input.

What if a 245/35-19 were used in the front, but a 275/30-19 were used in the back, would that be better?

Interesting....thanks for this input.

What if a 245/35-19 were used in the front, but a 275/30-19 were used in the back, would that be better?

In a reinforced load rating, you'd have enough load capacity, but it's 4.4% shorter than stock. :nono:

Why not just go with the proper 275/35R19?

In a reinforced load rating, you'd have enough load capacity, but it's 4.4% shorter than stock. :nono:

Why not just go with the proper 275/35R19?

Actually, in case you didn't notice, I asked the professional from the Tire Rack, not you. But I will answer your question anyway, for the benefit of the board.

If I move forward with a G8 purchase, I will have a separate set of 4 wheels & tires specific for road course racing, with yet another set of drag-specific rears. The OD (outside diameter) of the racing tires I am looking at are closer to 26" than the stock 26.7 inches. So, I will likely lower the suspension to accommodate the shorter racing setup. Since I will not want to be constantly playing with ride height, I was looking at a lower profile street setup as well.

Actually, in case you didn't notice, I asked the professional from the Tire Rack, not you. But I will answer your question anyway, for the benefit of the board.


Jeez, what a dick. I guess 18 years in the tire business doesn't make me a professional. Have a nice day. :fawkdance:

Jeez, what a dick. I guess 18 years in the tire business doesn't make me a professional. Have a nice day. :fawkdance:

Professionalism has much more to do with behavior than knowledge, and with this post, I think we all know where you stand.

Professionalism has much more to do with behavior than knowledge, and with this post, I think we all know where you stand.

No, that's not what you insinuated when you referred to Tire Doc as the "professional." And based on many of your previous posts, I think we all know where you are lacking. I wasn't unprofessional to you in any way until you decided to insult me. Again, have a nice day. You'll find out on your own how your setup won't work.

No, that's not what you insinuated when you referred to Tire Doc as the "professional." And based on many of your previous posts, I think we all know where you are lacking. I wasn't unprofessional to you in any way until you decided to insult me. Again, have a nice day. You'll find out on your own how your setup won't work.

If you think that a 1" shorter tire "won't work" just because it's one inch shorter, then I seriously question your 18 years of experience.

If you think that a 1" shorter tire "won't work" just because it's one inch shorter, then I seriously question your 18 years of experience.

Did I say that was the (only) reason? Stop putting words in my mouth. You can question my experience all you want, I don't care. I question your ability to reason like a sane person. Do what you want, it's your car.

Probably the biggest issue will be with the computer. I ran a 1" taller tire on my 300c, it did affect the performance somewhat. If you think a couple hundred r's is bad, wait til the gxp comes out with a 370 gear. I would say about 2500 rpm at 75, mine now runs about 1800 at 70 with a 291 gear. These motor are the best small block gm has ever built, it is practically bullit proof. It will increase your fuel consumption going from 1800 to 2000, proabably very little over the long haul. You won't hurt this motor with 200 r's. I turn mine 6 grand all the time. Its hammer time. see ya

Holy Crap i didnt think it would spark that much of a debate!! lol

Thanks for the help fellas!