19" rims width - Ford Mustang Forum
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post #1 of 24 (permalink) Old 03-29-2016 Thread Starter
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19" rims width

I just got a new pair of summer tires for my 2013 GT/CS - I went with with The new Nitto G555 and really like them - I have used 275/40-19 in the past with no issues so went with the same size - When I had this pair installed and balanced they measured the rim and it was 9" not the 8.5 advertised - I have no idea why this was but they are pros and assured me that was the width - this is just FYI - maybe that is the reason I had no problems and the fit looked fine.

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post #2 of 24 (permalink) Old 03-29-2016 Thread Starter
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Forgot to say this was rear only - have the 245/45-19 on front also Nitto but all season performance

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post #3 of 24 (permalink) Old 03-29-2016
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The factory 19 inch wheels from the Brembo/Track Pack cars are 19x9. Not sure what options came on the GT/CS cars. Are your wheels factory?

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post #4 of 24 (permalink) Old 03-29-2016
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You have different tires front & rear?


I'm thinking that's a bad idea.

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post #5 of 24 (permalink) Old 03-29-2016 Thread Starter
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never been a problem works just fine -

and never thought about it but I do have the track pac explains the 19 9 inch
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post #6 of 24 (permalink) Old 03-29-2016
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Quote:
Originally Posted by olehead View Post
never been a problem works just fine -

and never thought about it but I do have the track pac explains the 19 9 inch
C/S or Track Pack.....now I'm confused.

With All-Season tires up front, and Ultra-High Performance tires on the back, you'll have big under-steer.
I'm guessing that isn't a concern for you.

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post #7 of 24 (permalink) Old 03-29-2016
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Originally Posted by NoVa5.0 View Post
. . .you'll have big under-steer.
I'm guessing that isn't a concern for you.
Only happens at 9.9/10ths of maximum cornering grip so pretty much never a concern on the street, as far as I can tell.

I never could understand why people talk about understeer on the street?

Different story on the track . . . gotta have all 4 tires howling pretty good before any significant understeer shows itself . . . I just can't imagine doing that on the street.

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post #8 of 24 (permalink) Old 03-29-2016
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Only happens at 9.9/10ths of maximum cornering grip so pretty much never a concern on the street, as far as I can tell.

I never could understand why people talk about understeer on the street?

Different story on the track . . . gotta have all 4 tires howling pretty good before any significant understeer shows itself . . . I just can't imagine doing that on the street.

The grip levels front to rear will be very different. In the OP's case, what is 7/10s or 6/10ths at the back, well within grip available, will be 11/10ths at the front, past the grip available.

With 4 Ultra High Performance tires, then under-steer is an issue only when pushing very hard. With All-seasons up front and Ultra High Performance in the rear, the rear will grip beautifully, and the front will plow on straight, at a lower than anticipated speed.

Still, I'm thinking it's not a concern for the OP.


And FWIW, I've experienced under-steer and over-steer on the street. Plus there's emergency situations to consider; having all-seasons on the front just kills braking performance.

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post #9 of 24 (permalink) Old 03-29-2016
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Quote:
Originally Posted by JBert View Post
Only happens at 9.9/10ths of maximum cornering grip so pretty much never a concern on the street, as far as I can tell.

I never could understand why people talk about understeer on the street?

Different story on the track . . . gotta have all 4 tires howling pretty good before any significant understeer shows itself . . . I just can't imagine doing that on the street.
Agreed.

Ideally one should have matching tires all around but if circumstances prevent that from happening I don't think there is going to be an issue in most cases.
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Quote:
Originally Posted by NoVa5.0 View Post
. . . . With All-seasons up front and Ultra High Performance in the rear, the rear will grip beautifully, and the front will plow on straight, at a lower than anticipated speed. . . . Plus there's emergency situations to consider; having all-seasons on the front just kills braking performance.
OK I do see those points . . . but still like you say probably not an issue under normal circumstances on the street.

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post #11 of 24 (permalink) Old 03-30-2016 Thread Starter
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Sorry I mislead you guys the tires on the front and rear are the same Nitto tread just different sizes - However before these I
G force on the rear in the summer and the stock P Zero on the front No issue at all -again I do not road race just 1/4 Mile - The one issue that I am sure you all know with staggered tires you get a less miles out of a set.
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I have a 2014 GT California Special....track pack was not an option for 13/14 GT CS package. CS GT's option list was severely limited in scope.....even the optional rear backup sensors weren't available.

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I have a 2014 GT California Special....track pack was not an option for 13/14 GT CS package. CS GT's option list was severely limited in scope.....even the optional rear backup sensors weren't available.

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I had to make my own Brembo CS.

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whats the wheel say on the back. 8.5x19 or 9x19. also when you measure the wheel its not from outside to outside. its where the tire bead sits to the other area where the tire bead sits.

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Quote:
Originally Posted by NoVa5.0 View Post
The grip levels front to rear will be very different. In the OP's case, what is 7/10s or 6/10ths at the back, well within grip available, will be 11/10ths at the front, past the grip available.

With 4 Ultra High Performance tires, then under-steer is an issue only when pushing very hard. With All-seasons up front and Ultra High Performance in the rear, the rear will grip beautifully, and the front will plow on straight, at a lower than anticipated speed.

Still, I'm thinking it's not a concern for the OP.


And FWIW, I've experienced under-steer and over-steer on the street. Plus there's emergency situations to consider; having all-seasons on the front just kills braking performance.
Does this same logic apply to a staggered set up?


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