2005-2009 Mustang Information on The S197 {Gen1}

optional tire sizes

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Old 7/19/04, 01:24 AM
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Discount tires web site is advertising wheel & tire combos for the 2005 mustang. They also listed optional tire sizes for the car.
245/55/17
255/50/17
255/55/17
275/50/17
Here is my list of questions:
What optional tire do you think will look best?
What optional tire do you think will be best for handling?
Possible mix-matching tire sizes on front and back?

Thanks 2005 muzzy

tire height stock 235/55/17 - 27.18

opt. 245/55/17 - 27.61
255/50/17 - 27.04
255/55/17 - 28.04
275/50/17 27.83
Old 7/19/04, 02:39 AM
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Hey there Muzzy. I am looking into the same thing. I like the look of bigger rims. The important thing to remember is what the tires do. The tires on your car are the proverbial rubber that meets the road. That means that the tires are what contacts the concrete and makes the car stick to the road. The numbers on tires are important as they will let you how much of the tire is actually meeting the road surface at any one time. Let me explain. 235/55/17 The 235 is how wide the tire contact is so a larger number means a wider and larger amount of tire that contacts the road surface. The 55 is the percentage of the width number that is the sidewall or height of the tire. So 55% of 235 is the sidewall. A smaller number here is desirable when using a wider tire in maintaining your overall tire height. The 17 is the rim diameter. So for performance reasons you should look at what kind of performance you want and at what application you are going to be using it. For drag racing I would stay with the 17 in. rim but definitly get the wider tire. IE: 275/50/17. This will give you more tire on the road with the same sidewall that the stock tire has for sidewall flex on those hard launches. If you are into road racing like I am. Then you are going to want a larger diameter rim. IE: 20in. I am looking at 245/40/20 front, and 275/35/20 rear. The reason is that the rear rim width is going to be 9.5 in and I want to use all the available width for tire contact and the smaller sidewall will reduce flexion for better cornering and handling. So I hope that takes the mystery out of tires and sizes for you.


Clint B.
Old 7/19/04, 04:43 AM
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Originally posted by Lanchpd@July 19, 2004, 2:42 AM
Hey there Muzzy. I am looking into the same thing. I like the look of bigger rims. The important thing to remember is what the tires do. The tires on your car are the proverbial rubber that meets the road. That means that the tires are what contacts the concrete and makes the car stick to the road. The numbers on tires are important as they will let you how much of the tire is actually meeting the road surface at any one time. Let me explain. 235/55/17 The 235 is how wide the tire contact is so a larger number means a wider and larger amount of tire that contacts the road surface. The 55 is the percentage of the width number that is the sidewall or height of the tire. So 55% of 235 is the sidewall. A smaller number here is desirable when using a wider tire in maintaining your overall tire height. The 17 is the rim diameter. So for performance reasons you should look at what kind of performance you want and at what application you are going to be using it. For drag racing I would stay with the 17 in. rim but definitly get the wider tire. IE: 275/50/17. This will give you more tire on the road with the same sidewall that the stock tire has for sidewall flex on those hard launches. If you are into road racing like I am. Then you are going to want a larger diameter rim. IE: 20in. I am looking at 245/40/20 front, and 275/35/20 rear. The reason is that the rear rim width is going to be 9.5 in and I want to use all the available width for tire contact and the smaller sidewall will reduce flexion for better cornering and handling. So I hope that takes the mystery out of tires and sizes for you.


Clint B.
What about this!! using the stock rims for now.Thinkin about 275/50/17 on the back and 245/55/17 on the front. Using these tire sizes shouldn't throw the speedometer off much. The look will improve for sure. Any coments or opinions on this tire set up.
Old 7/19/04, 05:42 AM
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this web site is great to match up sizes .It will even tell you the speddometer differences
Old 7/19/04, 06:17 AM
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I think the 255/45R18 will look just fine.
Old 7/19/04, 05:15 PM
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different tire sizes front and rear I mean on size front another rear might confuse the traction control if they differ to much.
Old 7/19/04, 05:29 PM
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Originally posted by Greywolf@July 19, 2004, 5:18 PM
different tire sizes front and rear I mean on size front another rear might confuse the traction control if they differ to much.
They are only .22 mm off in height. and 30cm off in width . would that matter?
Old 7/19/04, 06:49 PM
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I'm just going to keep my stock wheels and tires. When the tires wear down and it's time for new ones, I'm gonna get 255/55 rubber on my stock rims. And keep 255's on the car from then on. Make those tires wider, and the diameter about an inch more to fill the wheel wells out a bit more.
Old 7/19/04, 08:29 PM
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if I were to upgrade I would go with 255/45...55's look too tall; 45's look just right
Old 7/19/04, 10:06 PM
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Originally posted by 00StangGT@July 19, 2004, 8:32 PM
if I were to upgrade I would go with 255/45...55's look too tall; 45's look just right
actually the 255/45/17 will be too small in height throwing the speedometer off almost 3.5mph.
I think this set up will work nice.
Front 255/50/17
rear 275/55/17
these sizes almost match with the speedometer off by 1.5 mph or so

look for your self. Go to yahoo. type in search tire size calculator and it will give you visuals of tire comparisons and how much the speedometer will be off your original tire size.
Old 7/19/04, 10:35 PM
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I would personally prefer the 255/55, simply because the tire diameter is larger, filling out the wheel wells better. The size of the sidewall doesn't have to be so small. I don't see the fascination with this. This is a Mustang. It's a muscle car, not one of those imports. Having a larger sidewall is a good thing, IMO. Works much better on a RWD muscle car like this. That's why I'm sticking with the stock 17's. No need for all that metal for me. More rubber is the way to go.
Old 7/19/04, 10:57 PM
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Originally posted by acadian@July 19, 2004, 9:38 PM
I would personally prefer the 255/55, simply because the tire diameter is larger, filling out the wheel wells better. The size of the sidewall doesn't have to be so small. I don't see the fascination with this. This is a Mustang. It's a muscle car, not one of those imports. Having a larger sidewall is a good thing, IMO. Works much better on a RWD muscle car like this. That's why I'm sticking with the stock 17's. No need for all that metal for me. More rubber is the way to go.
well said, thats how I feel. Im a sidewall man. Not too exxagerated either. 17's with a 28 or so overall diameter would be good in gap fillness.
Old 7/20/04, 07:06 AM
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Originally posted by 2005muzzy+July 19, 2004, 6:32 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (2005muzzy @ July 19, 2004, 6:32 PM)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-Greywolf@July 19, 2004, 5:18 PM
different tire sizes front and rear I mean on size front another rear might confuse the traction control if they differ to much.
They are only .22 mm off in height. and 30cm off in width . would that matter? [/b][/quote]
thats .22" = 5.588mm

and the width diff is 30mm = 3cm

Old 7/20/04, 07:44 AM
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Originally posted by 2005muzzy@July 19, 2004, 10:09 PM
I think this set up will work nice.
Front 255/50/17
rear 275/55/17
these sizes almost match with the speedometer off by 1.5 mph or so

((255 * .5) * 2)/25.4 + 17" = 27.04" Diameter, 84.95" traveled per revolution

((275 * .55) * 2)/25.4 + 17" = 28.91" Diameter, 90.8" traveled per revolution.

Front to rear height difference of 1.87"

Stock:
((235 * .55) * 2)/25.4 + 17" = 27.18" Diameter, 85.34" traveled per revolution.



A 275/45-17 would be a better choice for the rear.
Old 7/20/04, 08:00 AM
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I think you could put 275's all around.

Correct me if I'm wrong but it seems most people will go with the same tire on all four corners up to 275 and then they make the rears wider (ie. 315)
Old 7/20/04, 08:16 AM
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Something like 275/45-18 in front and 315/40-18 in back!
Old 7/20/04, 08:29 AM
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I want to get 18" Chrome Bullitts and the only ones I can find have the +26mm offset, and according to posts, the 05's have a +45mm offset. With an 18x9 wheel, does anyone think the tire will stick out past the fender lip? I don't want my 05 to ride ghetto. thanks.
Old 7/20/04, 09:34 AM
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Originally posted by Dan@July 20, 2004, 8:03 AM
I think you could put 275's all around.

Correct me if I'm wrong but it seems most people will go with the same tire on all four corners up to 275 and then they make the rears wider (ie. 315)
will 315's fit on the stock rim?
Old 7/20/04, 09:48 AM
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Originally posted by 2005muzzy+July 20, 2004, 10:37 AM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (2005muzzy @ July 20, 2004, 10:37 AM)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-Dan@July 20, 2004, 8:03 AM
I think you could put 275's all around.

Correct me if I'm wrong but it seems most people will go with the same tire on all four corners up to 275 and then they make the rears wider (ie. 315)
will 315's fit on the stock rim? [/b][/quote]
no

stock 05 being 17x8
Old 7/20/04, 11:46 AM
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Originally posted by 2005muzzy+July 20, 2004, 11:37 AM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (2005muzzy @ July 20, 2004, 11:37 AM)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-Dan@July 20, 2004, 8:03 AM
I think you could put 275's all around.

Correct me if I'm wrong but it seems most people will go with the same tire on all four corners up to 275 and then they make the rears wider (ie. 315)
will 315's fit on the stock rim? [/b][/quote]
Arbocs right...
the stock 17x8...the widest would be 275 probably...

If its a 17x9 or 18x9....
I'm not sure the widest, but the 'normal' tire on that is a 275 and the lowest you'd want on that is a 255 (some guys have put 245s on but I wouldn't want to risk that)


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