Hi I have a Edge CTS, my stock wheels are P275/45R22 When I program the tire/wheels size, would I use those values for metric size?

 

Calculate the diameter and multiply by .97 (3% squish).

That's your starting point. Adjust from there using a known distance or GPS.

Now that I think about it, actually your starting point should be one of the 10000000000000000000000000 threads discussing tire sizing.

 

If we searched for every question we have chances are it has been covered at one time before. Does this mean we cant make any new posts because someone has already covered it? Its a forum and the same information will keep going around and around for years to come. Its much easier to post up a question than it is to sit there and read through pages of information.

 

Which way are you trying to program in your tire size?
Through the user menu or custom options?
The user menu uses the tire size as it appears on the side wall of the tire...
The custom option way uses height of tire in inches.....

 

In other words, you're too impatient to wait for .23 seconds for 250 similar threads?

Or are you just too lazy to type "tire size" and hit search?





Is there a reason noticed you never answered the question...

 

OK, folks, calm down - we don't really need to belabor this. Yes - SEARCH, but sometimes you don't find exactly what you're looking for.

One of the problems with the new CS/CTS platforms is that there are two different places where you can enter the Tire Size (TS). One is the "Options Menu", and if you do it there, using the "English" or P-metric size on the sidewall, it will not account for "squish", as shotgunz has pointed out. However, you CAN use the "Options" Menu and enter the size as a "circumference" or as a "diameter", and these, I think, can be adjusted for "squish" by multiplying the unloaded diameter or circumference by 0.97 as a starting point. As far as I can tell, this sets your "stock" tire size.

I've always used the "Custom Options" menu though, which you are offered as you load a tune. Here, as 88Racing says, you enter the diameter in inches - again, adjust it for "squish".

- Jack

 

Shotgunz, relax buddy. Simma down na. I molest the hell out of the search feature when I need to know something because I see 100000 other posts by people like you who complain about not using the search feature. Oh well its not the end of the world.

Thanks for the input everyone. I used the menu option to change tire size. I was putting in the tire/wheel size in the metric option because the 275/45/22 values seems to fit in perfect with the metric. So I was basically I was doing the tire sizing all wrong?

 

My Metric to English conversion for my wheel/tire is

275/45/22 = 31.7x10.8/22

http://www.redrock4x4.com/tireconver...Name=Calculate

 

Come on Shotgun you have a excel spread sheet on this?

This is what I found when I used the search feature:

 

Yes I do.

IIRC I offered to anyone that wanted it (and sent it to several members).

 

Mods you can lock this thread. I did more of the "search" feature and found many answers. Actually the search feature on yahoo was more helpful then the search feature on this forum.

Could you send me the excel print out of mine? 275/45/22

Thanks!

 

There is no need to close it. It may help someone else in the future, if they use the search feature.

 

In another thread I started I mentioned a website called www.powerdog.com put your numbers in and out comes your results in metric or US but you have to choose and then you apply the squish and walah you've got your starting number.....

 

That excel sheet should get you pretty close. After you set it I would go on the open road with a GPS unit like someone else mentioned above to make sure its to your liking. I was surprised to see that my speedo was a few mph off from the factory.