Replacing stock tires - Ford Mustang Forum
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post #1 of 16 (permalink) Old 05-15-2016 Thread Starter
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Replacing stock tires

Hello all. I have a 2014 g t with track pack (9 inch wheels) bought new. It came with the Goodyear eagle f1 "super car" tires in 255/40/19. After 30k miles, it is time to replace them. I would like to get the 255s in the front but try 275s in the back. I just have a couple of questions please:

What do think is the best (not necessarily cheapest) way to get them? 1. Order online (e.g. AM or tire rack), 2. go to a "chain" tire store, 3.Ford dealer ? 4 . Order online and have them delivered to one of these places and pay for installation - if they would do that? Fyi - I do not have a way to get them delivered to my home.

Also, I do like these Goodyear tires and would be fine with getting the same ones - just maybe staggered. Just want to make sure it is done right.

Thanks for any advice on buying - installing process!!!


Last edited by Rogan01; 05-15-2016 at 03:23 PM.
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post #2 of 16 (permalink) Old 05-15-2016
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Get 275/40/19's on all 4 corners, they fit great and you can rotate them.

If you want the "best" place to get them, a local quality tire store is easier to deal with when/if you have problems.

I've had good experience with Discount Tire and they had the best price on the tires I wanted.

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post #3 of 16 (permalink) Old 05-15-2016 Thread Starter
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Thank you firestorm. Much appreciated!
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post #4 of 16 (permalink) Old 05-15-2016
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275/40/19 will be a little taller than your current tires and will thus drop a little overall gearing.

You can cram 285/35/19s on there and they will be a touch shorter than the current set.

The F1 supercar is actually really good. It's much better than the PZeros I had on my BBP 2012 car. I'd definitely buy them again. They don't seem to live too long but, nothing that performs like this does.

Michelin Pilot Supersports are the gold standard here but they are very spendy....as is anything decent in 19" sizes.

2014 Premium GT, SGM, Brembo, Auto, Tech, Comfort, etc. GT500s, Steeda UCA, VMP auto tune, 100 shot on BBR tune, best et: 11.38 at 120.85

2012 GT, Candy Red, Brembo, 3.73, Tech, Comfort, etc. Procal tune, Roush upper, UMI LCAs, Steeda red bracket, GT500s, 28X10X16 Hoosier slicks, best et: 11.91 at 115.23 RIP
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post #5 of 16 (permalink) Old 05-15-2016
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Quote:
Originally Posted by 5LHO View Post
275/40/19 will be a little taller than your current tires and will thus drop a little overall gearing.

You can cram 285/35/19s on there and they will be a touch shorter than the current set.
The 275/40/19's will be .7" taller total. This is around 2mph different than stock at 70mph. The 275/35/19's are .4" shorter. I've seen 275/35 and 275/40 on the same car and the 35 just looks way to small in the wheel well. The total gearing difference would be minimal.


285's would be outside any manufacturers range for a 9" rim, especially with a 35 sidewall.

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post #6 of 16 (permalink) Old 05-15-2016 Thread Starter
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Thanks so much for the the help so quickly! Much appreciated.
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post #7 of 16 (permalink) Old 05-15-2016
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That's why I said 285 and, I've seen 'em on many TP and BBP wheels...it defintely goes...despite being outside the range for a 9.

I'm on an auto myself, so, I ain't looking to soften the gearing any further....even if minimally

2014 Premium GT, SGM, Brembo, Auto, Tech, Comfort, etc. GT500s, Steeda UCA, VMP auto tune, 100 shot on BBR tune, best et: 11.38 at 120.85

2012 GT, Candy Red, Brembo, 3.73, Tech, Comfort, etc. Procal tune, Roush upper, UMI LCAs, Steeda red bracket, GT500s, 28X10X16 Hoosier slicks, best et: 11.91 at 115.23 RIP
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post #8 of 16 (permalink) Old 05-15-2016 Thread Starter
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Quote:
Originally Posted by 5LHO View Post
275/40/19 will be a little taller than your current tires and will thus drop a little overall gearing.

You can cram 285/35/19s on there and they will be a touch shorter than the current set.

The F1 supercar is actually really good. It's much better than the PZeros I had on my BBP 2012 car. I'd definitely buy them again. They don't seem to live too long but, nothing that performs like this does.

Michelin Pilot Supersports are the gold standard here but they are very spendy....as is anything decent in 19" sizes.
I like them also. The car was supposed to come with the p zeros but the dealer that originally had the car swapped them. The p zeros I had on my 2011 Brembo only lasted only about 23k miles. These have gone to 30k. Would need to buy them online and hope I can get a good shop to take delivery and install. Otherwise will check different chains for stock or order but seems I would pay more - however maybe easier to deal with any issues.

Thank you for the feedback.
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post #9 of 16 (permalink) Old 05-16-2016
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My recommendation: check the tire manufacturer's recommended wheel width for the tire you are considering, and don't put wide tires on a wheel that is too narrow for them. You won't get any real benefit from the wider tire on the narrow wheel, it will just cost more and will compromise handling. . . . only benefit is you might like the way it looks better.

You can find the wheel sizes in the "specs" section on Tire Rack.

I'm pretty sure that very few if any manufacturers will recommend a 9" wheel for a 275 or 285 tire, especially the low profile ones.

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I'm pretty sure that very few if any manufacturers will recommend a 9" wheel for a 275 or 285 tire, especially the low profile ones.
For the Pilot Super Sport Michelin recommends
9-11" for 275/40/19 and 275/35/19
9.5-11" on the 285/35/19

http://www.michelin.ca/tire-selector...ails#techspecs
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Just to let everyone know, Continental claims that their 285/35/19 will fit a 9 inch rim. I still think that might be pushing it. 275/40/19 would probably be the best choice. This is what I'm going to do when mine wear out.
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I'm going to go against everyone's recommendation of cramming a bigger tire on a smaller wheel. Do people do it? Yes. It just isn't ideal.
255s fit perfectly on a 9" wheel and the entire tire will contact the ground. Anything bigger and the edges start to curve down and don't touch the ground. You also introduce sidewall slop and a lazier handling feel.
275s fit best on a 9.5. 285s fit best on a 10. You want to be in the MIDDLE of a tire's recommended size range, not on the absolute edge or even outside the range.

Besides, a 255 michelin pilot super sport will do far better than a 275 or 285 in most other tires you'd be looking at.
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I replaced my rears only and upgraded from 255/40r19 o 275/40r19 Michelin Pilot Super Sports. It added about an inch of diameter, but cured all of the traction problems I had with the stock rims. I have the 3.73's in mine as well. Stock Brembo Rim.


I ordered my tires online at America's Tire Co and scheduled the install on a Saturday.

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post #14 of 16 (permalink) Old 05-20-2016 Thread Starter
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After checking around, I actually got a good price from the dealer where I bought the car. They had no issue with the 255/40/r19 in front and 275/40/r19 in the rear. The parts person that helped me said he had that setup on his car. Getting them installed there Tuesday. They are the Goodyear Eagle F1s supercar. Thanks for all the feedback!

Last edited by Rogan01; 05-20-2016 at 10:21 PM.
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Quote:
Originally Posted by Rogan01 View Post
After checking around, I actually got a good price from the dealer where I bought the car. They had no issue with the 255/40/r19 in front and 275/40/r19 in the rear. The parts person that helped me said he had that setup on his car. Getting them installed there Tuesday. They are the Goodyear Eagle F1s. Thanks for all the feedback!
Good luck if you drive in the rain.


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