19" rims width - Page 2 - Ford Mustang Forum
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Originally Posted by LosAngelesGT View Post
Does this same logic apply to a staggered set up?

Staggered in width? Or in height?


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Originally Posted by LosAngelesGT View Post
Does this same logic apply to a staggered set up?
It's not always as simple as square vs staggered. Various items like sway bars, spring rates, shock settings, weight balance, tire pressures, driving habits, etc can all have a significant effect on understeer and oversteer.


There is also a whole list of reasons why a car would come from the manufacturer like that.

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Originally Posted by NoVa5.0 View Post
Staggered in width? Or in height?
Width

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Originally Posted by Blazin72 View Post
It's not always as simple as square vs staggered. Various items like sway bars, spring rates, shock settings, weight balance, tire pressures, driving habits, etc can all have a significant effect on understeer and oversteer.


There is also a whole list of reasons why a car would come from the manufacturer like that.
I see

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Quote:
Originally Posted by LosAngelesGT View Post
Does this same logic apply to a staggered set up?


Yeah there is more too it, but yes this is the same logic that leads to "staggered tires (wider in the back) will induce more understeer." Which is a fancy way of saying, the front tires will break loose before the rear in a corner; because the front has less traction becasue the tires are narrower. Plus these cars are set up for understeer from the factory because it is a more "natural" reaction (when going too fast aroud a corner, car wants to go straight . . . instead of swapping ends)

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Originally Posted by LosAngelesGT View Post
Width.

Yeah, there would be some under-steer, more or less depending on how big the difference in contact patch is front-to-rear.


My biggest personal concern is braking and front-end grip. I don't like under-steer, and I can deal with the back end losing grip before the front. But I do want the damn car to stop as quickly as possible.

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Plus these cars are set up for understeer from the factory because it is a more "natural" reaction (when going too fast aroud a corner, car wants to go straight . . . instead of swapping ends)
This is the case for most street cars- as is brakes being overly biased toward the front.

http://homepage.ntlworld.com/terry.c.../handling.html
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Jesus....lol, blah blah blah. Bunch a ladies. Lol. To actually answer the OP question.

11-14 GT/CS wheels are 19" X 8.5"

YES, 275/40/19's fit!
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Originally Posted by zinc03svt View Post
Jesus....lol, blah blah blah. Bunch a ladies. Lol. To actually answer the OP question.

11-14 GT/CS wheels are 19" X 8.5"

YES, 275/40/19's fit!
They may well physically mount to the wheel and hold air, but it is a fitment outside industry recommendations. On the low side, which can lead to slightly greater sidewall heating in use and less precise handling. There may be ABS and/or AdvanceTrak consequences, as those systems are calibrated with the OE tires and any differences between OE front and OE rear in mind.

On the matter of understeer, it's there all the time and can even be expressed in terms of the difference between front and rear tire slip angles. More slip angle up front (narrower tires or less cornering-performance-oriented tires) is the definition of understeer. And vice-versa for oversteer. Maybe you don't notice this at normal cornering levels - the difference might only be a fraction of a degree - but as cornering g's increase so does this difference in slip angle. You may never plan on cornering at 0.8g, but occasionally poo happens and you might find yourself way up there, Think about it, and ask yourself if you really want to piggyback a second surprise on top of the one that's provoking the emergency maneuver in the first place.

You can crutch a tire stagger understeer with less understeerish suspension tuning, though this puts the tires and the suspension working at cross purposes as you approach the limits. Doesn't make a lot of sense to me.


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Quote:
Originally Posted by zinc03svt View Post
Jesus....lol, blah blah blah. Bunch a ladies. Lol. To actually answer the OP question.

11-14 GT/CS wheels are 19" X 8.5"

YES, 275/40/19's fit!

Why settle for a skinny little 275? Go 315, those will "fit" too!

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