Tire availability 2005/2006 GT


dreimer

GT Owner
Mark II Lifetime
Feb 8, 2018
179
Ponte Vedra Beach, FL
Hello everybody… I’m a proud new owner of a 2005 Red Ford GT with 878 miles. I put 100 miles on my car last week. I’m in heaven. Great car!

My local tire store manager found a GT owner that said these tires fit:

Bridestone Potenza
F: 265/40R18
R: 345/35R19

I ordered them. I will confirm when I get them installed.

Does anybody have experience and know if they will fit?
They fit perfectly.
 
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2112

Blue/white 06'
Mark II Lifetime
Yes, they fit. No, they won't rub. Yes, they ride better than the Goodyears. Yes they are quieter and have better grip.

Until something better comes along, they are the tire to use.
.
 

Justin

GT Owner
Jun 30, 2013
27
Massachusetts
Yup, fit perfect. Ordered mine from Amazon… arrived and had local mobile installer do the work.
 

MontanaMoose

GT Owner
May 31, 2016
11
South West Montana
Hello everybody… I’m a proud new owner of a 2005 Red Ford GT with 878 miles. I put 100 miles on my car last week. I’m in heaven. Great car!

My local tire store manager found a GT owner that said these tires fit:

Bridestone Potenza
F: 265/40R18
R: 345/35R19

I ordered them. I will confirm when I get them installed.

Does anybody have experience and know if they will fit?
Am I wrong with this, but I think this will mean your odometer is going to show about 5% more miles than you have actually driven based on the rear tires being 11 mm (about 0.4 inches) smaller than the original tires.
 

SYCO GT

GT Owner
Mark II Lifetime
Sep 9, 2006
5,043
California
Since I think most all of us that are driving their '05/'06 GTs are running the Potenza's, then all our mileage will be relatively equal.

And yes, have enjoyed a couple sets of these. I think they are better in all respects than the OEM option.
 
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extrap

GT Owner
Mark II Lifetime
Jul 16, 2020
1,898
Gainesville FL
I don't think there are any other choices anyway, at least we never see any on this forum ... unless you're willing to change wheel sizes.
 

2112

Blue/white 06'
Mark II Lifetime
Couldn’t pay me to go back to the GoodYears. Yes, the Bridgestones are that much better.

extra miles (4%) are a small price to pay for a tire better in every regard.

4% is calculated using published revolutions per mile. 728 for the Bridgestone, 699 for the Goodyear.
 
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MontanaMoose

GT Owner
May 31, 2016
11
South West Montana
Is there a way to recalibrate the speedometer?
 

2112

Blue/white 06'
Mark II Lifetime
@tmcphail should know the answer to that.

I know you can do that in a 2006 F350
 

nota4re

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Feb 15, 2006
4,281
The diameter of the 315/40-19 OEM Goodyear tire is 28.92".
The diameter of the 345/35-19 Bridgestone tire is 28.51".

That's a speedometer error of about 1.4%.... nothing to worry about.
 

fjpikul

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Jan 4, 2006
11,680
Belleville, IL
The GT Guy Rich Brooks can recalibrate the tire diameter in the cars computer. But as Kendall says,it really is within the margin of error.
 

PeteK

GT Owner
Mark II Lifetime
Apr 18, 2014
2,470
Kalama, Free part of WA State
Keep it in perspective. I run the Bridgestones, and when my speedo says I'm going 80, I'm really around 78. The speedos had a slight positive error even with the Goodyears.
 

Shark01

GT Owner
Jul 22, 2012
599
Houston Texas
All speedometers have a margin of 2-3 mph designed into them.
 

GT@50

GT Owner
Mark II Lifetime
Dec 14, 2019
941
Issaquah
And sometimes my speedo says 60 but I'm only doing 2.
 

2112

Blue/white 06'
Mark II Lifetime
All speedometers have a margin of 2-3 mph designed into them.

In every vehicle we have, it shows faster than the actual speed.
 
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PL510*Jeff

Well-known member
Mark IV Lifetime
Le Mans 2010 Supporter
Nov 3, 2005
4,900
Renton, Washington
I put the GT on chassis dyne and with hand held reader made the adjustments to be spot on accurate.
 

MontanaMoose

GT Owner
May 31, 2016
11
South West Montana
Thanks for the insights and help.
 

roketman

GT Owner
Mark IV Lifetime
Oct 24, 2005
8,086
ma.
I just ordered a new set of Bridgestone’s tires from Bill at Radial tire +1 (703) 554-4803
He stated he just got all fresh build codes
 
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MTV8

GT Owner
Mark II Lifetime
Jul 24, 2010
1,021
Houston Texas
Looks like a new option for rear tires will be available soon.

 

2112

Blue/white 06'
Mark II Lifetime
Interesting that they would jump in the game at this juncture.