Tire size question

[mikey]

Has anyone tried a 235-55 R17 tire on their G6?

It's about 3/4" wider than OEM and 1" larger in dia than OEM.

Your thoughts?

Mikey

[EmersonHart13]

Should ride good and fit fine. Go check http://www.tires.com or http://www.tirerack.com to see if they have that available as an optional size...

Also look at the Miata Tire size calculator that has been stickied in this forum to calculate the difference in circumference.

John

[loblazin06g6]

That much taller tire could cause some abs problems and it will definetly cause your speedo to read slow. I used a 235-45-18 and they are just slightly taller, no problems. Good luck

[mbiker97]

First a 235 is only 10mm wider than a 225 (assuming you have the standard GT tires).

A 235/55-17 is the wrong size. Your speedo would be off ~5.1%. A 235/50-17 or a 245/45-17 would be a lot better. I'm not sure how wide the stock GT wheels are, or what wheels you would be mounting these too, but make sure that they are wide enough for what ever tires you get.

[Ruckmn]

Keep the same tire height (diameter) as stock. ABS and Speedo affected.
Here is a chart of tire heights:
http://www.sstire.com/tireheights.html

Or Calculate the tire diameter yourself:

Tire Diameter = ((width)(.aspect ratio)/25.4)(2) + wheel diameter

Example: 225/50 X 18" Stock on my G6 convert GTP

((245(.50)) / 25.4)(2) + 18 = 27.65"

Later,

[mikey]

My painted rims are the 16s, with 215-60/R16 tires with a profile height of 129mm and an OD of 26 3/16".

I wanted to keep the profile height, and adjust for the difference in the speedo...

Apparently the tire I want is not available in 235-55/R17... but it is available in 225-55R17.

So that'll give me a profile height of 124mm and an OD of 26 3/4". Pretty darn close to original.

I guess it'll have to do!

Mikey

[Toyz]

mikey what wheels are you going to be puttin your tires on?

[mikey]

these... they come from a G6 GT.



Mikey

[Toyz]

these... they come from a G6 GT.

Mikey

how i love those wheels... :smoke:

[BlownGP]

My painted rims are the 16s, with 215-60/R16 tires with a profile height of 129mm and an OD of 26 3/16".

I wanted to keep the profile height, and adjust for the difference in the speedo...

Apparently the tire I want is not available in 235-55/R17... but it is available in 225-55R17.

So that'll give me a profile height of 124mm and an OD of 26 3/4". Pretty darn close to original.

I guess it'll have to do!

Mikey

what are you talking about they dont have 235/55

You got plenty to choose from

http://www.ec-securehost.com/cgi-bin/On ... search.cgi

Your speedo going to be off my 1 MPH,,, big fukin DEAL!!

[BlownGP]

First a 235 is only 10mm wider than a 225 (assuming you have the standard GT tires).

A 235/55-17 is the wrong size. Your speedo would be off ~5.1%. A 235/50-17 or a 245/45-17 would be a lot better. I'm not sure how wide the stock GT wheels are, or what wheels you would be mounting these too, but make sure that they are wide enough for what ever tires you get.

How is a 235/50 better, its even a shorter tire.
A 245/45 is even worse... you need to get a better calculator.

[mbiker97]

How is a 235/50 better, its even a shorter tire.
A 245/45 is even worse... you need to get a better calculator.

Did you notice that he was also going from 16s to 17s?

[mikey]

I'm considering the tires from the Ford 500, 215-60/R17, to give the G6 that lowered look...


or the tires from the Nissan Altima, 215-55/R17



Mikey

[BlownGP]

How is a 235/50 better, its even a shorter tire.
A 245/45 is even worse... you need to get a better calculator.

Did you notice that he was also going from 16s to 17s?

Yes, but that doesnt matter..

I was comparing the stock 17" tire size that comes on the GT

[mbiker97]

I was comparing the stock 17" tire size that comes on the GT

I'm sorry, but you are wrong because you used the wrong size stock tire.

Stock 215/60-16 (which the original poster has) = ((215*.6)/25.4)*2+16= 26.157"

Stock GT tires 225/50-17 = ((225*.5)/25.4)*2+17= 25.858"

235/55-17 = ((235*.55)/25.4)*2+17= 27.177"

my suggestions

235/50-17 = ((235*.50)/25.4)*2+17= 26.252" <---- almost perfect

245/45-17 (which wouldn't fit the wheel anyway) = ((245*.45)/25.4)*2+17= 25.681"

All numbers also reverified using the miata.net tire calculator.

Where again is my math wrong??!