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Old 02-09-2007, 04:49 PM   #1
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what size

i have a 2001 v6 with eibach springs, 4 wheels american racing 17 x 9.5( bullit replica), and tires 285/40/17 in the banck and 245/40/17 front

i'm planning put a cobra 2003 wheels in it(17 x 9) can i use the same size of the tires that i m running right now???
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Old 02-09-2007, 04:50 PM   #2
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Re: what size

03 Cobra Wheels FTW
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Old 02-09-2007, 06:35 PM   #3
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Re: what size

first off, this thread might help you out http://www.mustangevolution.com/forum/t25784

personally, i think with a 17x9 wheel, you should have a MINIMUM of 255 on the front, if not more. 275 would probably be ideal.

i have 275/40/17 in the back on mine (17x9 steeda ultralites I) and 255/40/17 in the back and have had no problems from them, but i would not go any smaller than 255...honestly i should have gone 275 up front as well and just got spacers
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Old 02-09-2007, 11:40 PM   #4
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Re: what size

right now i have 285/40/17 in the back on 17 x 9.5 wheels and 245/40/17 in the front, i like how it looks, but why u dont use i tire minimun of 255 ???
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Old 02-10-2007, 09:37 AM   #5
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Re: what size

cause the smaller the tire, the more likely you are going to get some major curb rash on your wheels, if you want any sort of protection for them, expecially a 9.5 wide wheel, get some 275s on them and keep them nice
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Old 02-10-2007, 10:17 AM   #6
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Re: what size

if i put a 255 , this size protect the wheel???
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Old 02-10-2007, 10:29 AM   #7
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Re: what size

Quote:
Originally Posted by carlosc View Post
if i put a 255 , this size protect the wheel???
No. Thats too skinny. Go with a 275/40-17 and you should be good.
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Old 02-10-2007, 10:33 AM   #8
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Re: what size

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No. Thats too skinny. Go with a 275/40-17 and you should be good.
i was sayin that was a minimum, but like zim said, 275 is the best to go
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Old 02-10-2007, 10:33 AM   #9
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Re: what size

the wide of a tire 275 is the same that a tire 245???

and if i put 275 in the front , what size can i use for the back, ???
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Old 02-10-2007, 10:52 AM   #10
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Re: what size

If you're getting the cobra wheels, just get the same size for all 4 tires that way you can still rotate them. And no, a 275 wide tire is not the same as a 245 (if thats what you're asking... hard to understand)
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Old 02-10-2007, 11:09 AM   #11
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Re: what size

right now i have americang racing wheels, is like a bullit wheels but 17 x 9.5, i like the cobra wheels but i saw some pics of the cobra and go to the garage to saw my wheels, and i stay with the americang racing, for now..

i like the way it looks with a bigger tires in the back(285), front (245)

but.. this wheels (17 x 9.5) rub in the anti roll bar when a take a curve in 180 , (U)

i noticed that the tire 285 is wider than the wheel, the 245 is the same,

the question
if i put 275 in the front the rubbing still the same or can make a major rub issues

pd rub only when i take a curve in 180 degrees , just when i rotate the steering wheel all thw way
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Old 02-10-2007, 11:31 AM   #12
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Re: what size

Yeah you'll have the rubbing with wider tires, just dont go into full lock and you'll be ok. You could do like a 295 on the rear if you wanted and get that staggered look.
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Old 02-10-2007, 11:47 AM   #13
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Re: what size

do you have any pic of wheels with 275 tires, just to see how it looks?
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Old 02-10-2007, 11:48 AM   #14
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Re: what size

...and thanks for the info zim, and meteora, like the color orange of your car
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Old 02-10-2007, 11:19 PM   #15
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Re: what size

can i use 245 / 45 / 17 on a 17x 9.5 rim??
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Old 02-10-2007, 11:28 PM   #16
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Re: what size

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can i use 245 / 45 / 17 on a 17x 9.5 rim??
Yes.
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Old 02-11-2007, 12:08 AM   #17
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Re: what size

what the differnce between a 285 /40 /17 and 245 /45/17,

my question is because i saw a mustang with 285 40 17 in the back and a 245 45 17 in the front an looks like the same size

what the difference??
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Old 02-11-2007, 12:43 AM   #18
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Re: what size

I will try to explain how to read tire sizes to you, but it may be hard to understand it over the internet.

Take a 275/40/17 tire for example. The first number (275) represents how wide the tire is in Millimeters, so a 275/40/17 tire is 275 Millimeters wide. The second number on a 275/40/17 tire (40) represents the height of the sidewall on the tire, but its does not mean that the sidewall is 40 Millimeters tall, it is the percentage of the wideth of the tire, so a 275/40/17 tires sidewall thickness is 40% of 275 in Millimeters. (You will have to do the math to find the exact #) The third number of course represents the size/diameter of the rim in inches that the tire is made to fit on.

I'm pretty sure this formula applies to all street tire, but not to drag or offroad tires. Somebody corect me if I'm wrong.

BTW you do not want to put a 245/45/17 on a 9.5" wide wheel. I miss read what you wrote, and thought you were asking if a 275/45/17 tire would fit on a 9.5" wide wheel.

I hope this helps you.
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Old 02-11-2007, 01:10 AM   #19
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Re: what size

thank for the info , i understand very well what this number means, but just curious, why u said "you do not want to put a 245/45/17 on a 9.5" wide wheel"??
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Old 02-11-2007, 03:52 AM   #20
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Re: what size

Because the wheel is 9.5 inches wide, a 245 tire is 9.653 inches wide. Therefore you will have .153 inches of tire over the wheels (if the tires are even an actual 245 mm) and divide this by two because of two sides to a tire and you have .0765 inches of tire to protect your wheels from a curb or anything else that might get close to the wheel. To give you a better view of this, that's about the thickness of a penny of protection for the wheel.
To me and 99% of the people who spend money on wheels, that is not near enough protection for a wheel, especially considering how much money it will cost to fix a wheel that has curb rash or a chunk taken out of it because of a curb or anything else in the roadway.
Me personally, I'm running a 275 width tire on my 18x9 wheels. This gives me approximately a 10.862 inch tire, giving me .931 inches of protection on the tire to protect against the wheel hitting something or anything causing damage to it.

It's all a matter of what you think is more important though. Would you rather save a little money and get a smaller, cheaper tire and the risk the fact that you could damage the wheel causing several hundred dollars to either repair the wheel or buy a new one.
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Old 02-11-2007, 09:23 AM   #21
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Re: what size

thank for the info, and your white stang is awsome , a just curious , your wheels (17x9) with the tire you're using, cause rubbing issues when you full lock the steering wheel??
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Old 02-11-2007, 02:16 PM   #22
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Re: what size

My wheels are 18x9, and I am running the 275/35-18 inch tires.

If I turn the steering wheel all the way, depending on the angle of the ground around me, sometimes it slightly rubs. I've noticed it doesn't do this all the time however. I'll have to check my sway bar sometime soon, since that's where they usually are rubbing.
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Old 02-11-2007, 03:37 PM   #23
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Re: what size

Quote:
Originally Posted by lowflyn View Post
My wheels are 18x9, and I am running the 275/35-18 inch tires.

If I turn the steering wheel all the way, depending on the angle of the ground around me, sometimes it slightly rubs. I've noticed it doesn't do this all the time however. I'll have to check my sway bar sometime soon, since that's where they usually are rubbing.
+1 for the sometimes rubbing, but its only when i make a really hard left or right
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Old 02-11-2007, 05:35 PM   #24
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Re: what size

thanx, mine sometines rubbing in the sway bar, but only when i take a left or right that i need to full lock, but i can liv with that , and my stang has 17 x 9.5 i think the rubbingin the ful lock is normal with 9.5, but later i will try spacers. soon i'll post some pics of my black stang 2001, but there is some mod: eibach spring, americang racing wheels 17 x 9.5 (bullit style), true dual flowmaster, painted mirrors, bbk cold air intake, fog lights ( mine is a v6 so dont came with it)
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