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GT@50

GT Owner
Mark II Lifetime
Dec 14, 2019
941
Issaquah
One dot will be for the heavy spot. Sometimes another dot is for a high spot. Rims are marked too. I can never remember what's what and neither can the tire guys
 
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jammer

GT Owner
Mark II Lifetime
Apr 19, 2016
187
Long time ago my 1990 Miata had red dots on the tires lined up exactly with black dots on the wheels. That's how the car was delivered new. The tech told me the tire dot marks the lowest point on the tire because tires can almost never be perfectly round and so are the wheels. So the two dots need to correspond with each other for a perfectly balanced tire/wheel comnination or something along those lines. Never confirmed that because it sounded like a good explanation until today when I heard unconvincing explanations from the shop that installed my tires.
 

Pettyfan43

GT Owner
Mar 29, 2022
76
Patterson Ca.
A new topic for Hudson1234 on BaT instead of tire date codes what’s the dot?
 

drilling

GT Owner
Sep 13, 2018
394
A new topic for Hudson1234 on BaT instead of tire date codes what’s the dot?

That guys has some weird obsession.
 
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fjpikul

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Jan 4, 2006
11,680
Belleville, IL
Did they high speed balance? The tires are supposed to be good in excess of 200 mph if high speed balanced. Mom and pop may not have the right equipment. As I remember. the two dots indicate the heavy spot on the tire and the light spot on the wheel (or vice versa). and just give a general alignment for the mounting staff. It does save time and extra lead weights. The Bridgestones are pretty equally balanced straight from the plant. I will send the Grey Ghost a note so he can chime in.
 

2112

Blue/white 06'
Mark II Lifetime
The Bridgestones are pretty equally balanced straight from the plant.

I have never had tires balance with less weight.

BBS wheels help a lot, I am sure.
 
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Kpgarage

GT Owner
Mar 17, 2019
91
When we were at Saleen SSV the tire wheel station guys were mounting and balancing. They were applying to
the little dot stickers. I presumed they were weight points. I still have them on my original set of tires wheels from my car and my sons. I will look when in shop today.
 

PeteK

GT Owner
Mark II Lifetime
Apr 18, 2014
2,469
Kalama, Free part of WA State
See this information from Tire Rack:

tire-wheel-uniformity-and-match-mountings-role
 

reiner

New member
Dec 31, 2019
4
With due respect. What ever you like is ok by me
But I’m sticking with what I know
The bad news MUST be true!
 

reiner

New member
Dec 31, 2019
4
have Nitrogen in the tires for my CJ3 and it's use in aircraft tires. 1. high altitude freezing 2. disipates through rubber slower than oxygen. 3. No moisture so not as much rubber degradation. 4. On landings tremendous heat can build up.
No one fills tires with oxygen.
 

PeteK

GT Owner
Mark II Lifetime
Apr 18, 2014
2,469
Kalama, Free part of WA State
The reason for using nitrogen in aircraft tires has to do with high pressure. Except for light aircraft (think Cessna, Piper, etc.), aircraft tires operate at very high pressures—hundreds of psi. It’s much more practical to use a high pressure gas cylinder/regulator to fill them than an air pump, and if you’re gonna choose a gas that is readily available in high pressure cylinders, cheap and relatively inert, nitrogen is the most practical choice. The kinetic diameters of N2 and O2 are so close that there’s no appreciable difference in permeability through rubber, but pure O2 would probably break down rubber faster due to it’s much higher chemical reactivity.
 

GT@50

GT Owner
Mark II Lifetime
Dec 14, 2019
941
Issaquah
The reason for using nitrogen in aircraft tires has to do with high pressure. Except for light aircraft (think Cessna, Piper, etc.), aircraft tires operate at very high pressures—hundreds of psi. It’s much more practical to use a high pressure gas cylinder/regulator to fill them than an air pump, and if you’re gonna choose a gas that is readily available in high pressure cylinders, cheap and relatively inert, nitrogen is the most practical choice. The kinetic diameters of N2 and O2 are so close that there’s no appreciable difference in permeability through rubber, but pure O2 would probably break down rubber faster due to it’s much higher chemical reactivity.
And blow up when heated
 

2112

Blue/white 06'
Mark II Lifetime
I guess this isn’t new news, but Discount Tire bought Tire Rack a couple years back.

 
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Pettyfan43

GT Owner
Mar 29, 2022
76
Patterson Ca.
I guess this isn’t new news, but Discount Tire bought Tire Rack a couple years back.

Hopefully Bridgestone keeps making our tires for Ferrari so we can continue to add miles to our GT’s getting close to needing a set of rears guess there’s no better time than now to order
 

GKW05GT

GT Owner
Mark II Lifetime
May 28, 2011
2,785
Fayetteville, Ga.
I have one new rear I bought as a backup in 2022 if anyone just needs one. Think 2022 build date
 

Pettyfan43

GT Owner
Mar 29, 2022
76
Patterson Ca.
Ready for tires that’s a good thing made a call to Bill at Radial Tire next day service they are amazing and great to deal with. Thanks Ferrari for making the tires we need available through Bridgestone
 

roketman

GT Owner
Mark IV Lifetime
Oct 24, 2005
8,086
ma.
Ready for tires that’s a good thing made a call to Bill at Radial Tire next day service they are amazing and great to deal with. Thanks Ferrari for making the tires we need available through Bridgestone
Bill Is the best ! Also the best prices and build dates!
 
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jnunberg

New member
Jan 10, 2019
1
Ordered a set of Bridgestone tires from Bill a few weeks ago. Tires arrived promptly and had them installed today at a local family owned tire shop (not chain) which has been in business for decades. Had the tires mounted on the standard wheels so I can preserve the option wheels that came with the car. Plus I like the standard wheels more. After the tires were mounted I noticed the little yellow dots on the tires didn't line up with the valve or the with black markers on the wheels. Asked the tech mounting the tires if he knew the significance of the dots on the tires and wheels, he had no idea what they represent or what to do with them. His senior supervisor said they are there just to let the factory know "they're done". The store owner knew vaguely what the markers represent but said he never paid any attention to them for as long as he's been in business. Question to the experts here, what do you think? Shouldn't these markers be used in mounting and balancing the tires or can they be totally ignored?
It is my understanding that the yellow dot should be lined up with the valve stem. Would you mind sharing the sizes and model number he sold to you as i have called Radial Tire and they seem to be in the dark. Bill is not there.
 

fjpikul

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Jan 4, 2006
11,680
Belleville, IL
There is plenty of info on this Forum. Just do a search.
 

jammer

GT Owner
Mark II Lifetime
Apr 19, 2016
187
It is my understanding that the yellow dot should be lined up with the valve stem. Would you mind sharing the sizes and model number he sold to you as i have called Radial Tire and they seem to be in the dark. Bill is not there.
P265/40ZR18 101(Y), Potenza RE050A N1
P345/35ZR19 110(Y), Potenza RE050A Scuderia