rear Bridgestone and front GY?


E

enrico

GT Owner
Jul 20, 2010
70
London, UK
not a tire expert unf and have not found the answer by searching the forum. My rears are a little worn out (see pic attached, they need to be changed, don't they?) and are def much more worn than the front ones.

Was wondering if there is anything against using the potenzas on the back and keeping the oem at the front?

Also, do you reconfigure the SVT to get accurate speedo and odometer reading with a smaller diameter?


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I would not mix tires - it's never a good idea to be honest. We all drive our cars fast, it's better to spend a few extra bucks and have the same boots in every corner.
 
If you look at the tire thread, the rolling diameter of the GY and the BS are very little and don't account for much variation in the speedometer. You can, if you have an SCT tuner, adjust the aspect ratio. I have not noticed much difference when driving at 80-85 - the tach reads about the same.
 
 
Take it from an old tire lawyer--don't mix tires. There are lots of horror stories involving cars not nearly as powerful /fast as GTs.
 
Gotcha, thanks guys for the insight, very very helpful. But just to be the devil's lawyer, wouldn't the same reasoning apply if we install a "rear" porsche tire in front (the 265 pole position XL)?

Anyways, 4 Bridgestone is gonna be sometimes soon then! Neil did you get them as well? If so would you reccomend somebody for install etc etc?

Thx
 
enrico said:
Gotcha, thanks guys for the insight, very very helpful. But just to be the devil's lawyer, wouldn't the same reasoning apply if we install a "rear" porsche tire in front (the 265 pole position XL)?

Anyways, 4 Bridgestone is gonna be sometimes soon then! Neil did you get them as well? If so would you reccomend somebody for install etc etc?

Thx
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I have the Goodyears on mine and they were fitted by Revolve (Roush). As my car (and yours no doubt) is unmarked, I wouldn't have anyone else in the UK touch it. I imagine they use a supplier to fit the tires, but they clearly use someone very careful!

I've heard here that the Goodyears are OK but not brilliant, and at some stage I'll switch, but up until now they've been fine for me - they last around 4,500 miles by the way...... :)
 
Just had a quick flash while reading this thread, front steering tires do a totally different job than rear drive tires. Why shouldn't their engineering be different. It would seem to follow some tires would be better for steering and others better for pushing the vehicle. Finding the best compromise should be the goal which might mean mix and matching.
 
I also dont recommend mixing tires. Why risk it to save a few bucks?
 
Agree Neil, in fact I had already spoken to David at Roush on Friday about it. I was just hoping to save the 300 quids of transport to brentwood by finding a qualified shop in town, knowing me it could be another opportunity to spend money on an upgrade (read pulley) by convincing myself that I would "save" the money of a trip.

Have a couple of other friends with a GT in town, i ll ask them as well if they had positive experiences outside Roush, otherwise i ll call the transporter.
 
enrico said:
not a tire expert unf and have not found the answer by searching the forum. My rears are a little worn out (see pic attached, they need to be changed, don't they?) and are def much more worn than the front ones.

Was wondering if there is anything against using the potenzas on the back and keeping the oem at the front?

Also, do you reconfigure the SVT to get accurate speedo and odometer reading with a smaller diameter?


View attachment 17038View attachment 17039
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Enrico
I just faced the same issue rears gone fronts fine. The goodyears are currently not in production and back ordered everywhere. the good year web site lists the price on the F-1 supercar tires at $770 us each for the rears. The cost from the Tire Rack for the Bridgtones were $1362 including shipping for all 4 tires. You can either wait up to 6 months for the goodyears on the rear or buy a set of bridgestones for all 4 and enjoy the drive. Never a good idea to run a different tires brands and compound on the front and rear.
 
In my searches, The Goodyear warehouse in TN had 6 rears in stock. I have confirmed their inventory. But I went for the Bridgestones.

Mike
 
paul b said:
Just had a quick flash while reading this thread, front steering tires do a totally different job than rear drive tires. Why shouldn't their engineering be different. It would seem to follow some tires would be better for steering and others better for pushing the vehicle. Finding the best compromise should be the goal which might mean mix and matching.
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I'm not so sure. Different rubber compounds between front and back and differing tread patterns, no matter how subtle, could be a risk. When a GT lets go, it lets go big time with no electronic nanny to help out. I think sticking with the same tire front and back is the best possible advice.
 
I was just on the tire rack website, they make mention of using slightly different tires front and rear in the Pirelli P-zero system.
 
I'm sure I'll be scolded for this, but I ran Goodyear race slicks on the front & the oe Goodyear F1's on the rear at Miller Motorsports Park a few years ago - no issues at all. It acted just like you would expect with sticky tires up front & not-so-sticky tires out back. No crazy handling weirdness... not even a little bit.
 
Team Jeff said:
I'm sure I'll be scolded for this, but I ran Goodyear race slicks on the front & the oe Goodyear F1's on the rear at Miller Motorsports Park a few years ago - no issues at all. It acted just like you would expect with sticky tires up front & not-so-sticky tires out back. No crazy handling weirdness... not even a little bit.
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Did work out as a net gain, loss, or no real difference?
 
I think you will be fine....

Put it this way..... you have 4 bad tyres with little grip.... You have the chance to swap the rears for 2 better tyres. Do you turn it down because they are not the same brand/compound/pattern?

Let's be serious....

The Goodyear are so hard it is difficult to get them up to temp, even on track. I don't care what the sidewall says about the wear. I found the Bridgestones so much better at the rear.

And for us here in the UK with the cold weather approaching I would do anything to swap the Goodyears out.

I have done 5k miles with the combo you are suggesting, with 1 track day at Silverstone and our outing at LeMans. I had absolutely no problems.

As Neil says the GT is a bit tricky without any electronic gizmos.... but the problem is at the back, not at the front....
 
Nice to hear your views Matteo, I assume you also changed them at Roush did you? If not and you can suggest a trusted place closer to london it would be great
 
I had them done at Roush/Mountune.
 
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