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Tire talk

juanprado

juanprado

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that is expressed in the ratings.
the higher the number, the harder the rubber and lasts longer hence more mileage.
Tires are rated for example 500/A/A
The letter grades are temperature and traction.
 
thoner7

thoner7

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juanprado said:
that is expressed in the ratings.
the higher the number, the harder the rubber and lasts longer hence more mileage.
Tires are rated for example 500/A/A
The letter grades are temperature and traction.
Click to expand...
Interesting. I’ve never heard of such a thing and researching it, I can’t find any info on the tires I was considering at all
 
V

vmaxmike

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thoner7 said:
Interesting. I’ve never heard of such a thing and researching it, I can’t find any info on the tires I was considering at all
Click to expand...

Google UTQG

you'll get an explanation

Tread wear is mainly about the tires durometer measurement ( hardness of the compound )

This measurement also changes with heat cycles.

M.
 
V

vmaxmike

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It short the lower the UTQG number the softer the rubber ( think sticky good for high speed cornering ) but they don't last.

The Higher the number the harder the rubber ( They wear much slower ) but they don't stick.


M.
 
8

87cr250r

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I think the rating requirements only apply to P series tires, P315/85R17 and not LT series, LT12.5/37R17 for example.
 
G

GTUnit

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Just a PSA on tires with old date codes. On the trail in the dirt you can get away with almost whatever as long as its stays together and holds air.

On pavement is when things really change and it gets serious.
Old date tires on pavement at moderate to highway speeds are Dangerous. (speaking from research AND experience.. bad ones)
Rubber is always drying and breaking down (at different rates in different environments but this basic fact does not change)
In most cases it becomes Harder and less pliable/stiffer with age.
So in older tires all the factory engineered tire dynamics and performance change to where they the tire no longer performs as intended.
This may be a mild change (depending on age and chemical composition) like tire that used to grip from a standing start that now breaks loose and spins on acceleration. It may also be a more serious performance degradation where all the tires will break loose on a basic lane change or change in road elevtion that unsettles the vehicle and you will go spinning across the road into oncoming traffic at 50mph.

This will be worse on road cars. I haven't experienced it in a truck with offroad tires but the rubber issue is the same. Maybe a light rain or snow and you get wrapped around a tree.

Bottom line is if you plan on travelling on paved roads at speeds above say 40 mph I would not use old tires. It creates a pretty significant risk to you, family, other valued occupants. Truck is replicable but still not worth rolling those dice after all the effort that went into it.
 
gringeltaube

gringeltaube

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rolling18 said:
interesting.. What has happened that makes them universally "garbage"? ..........
Click to expand...
HMMWV MT/R tires: Some go, some blow....

Goodyear MT/R Tires Safety Message

I received a Safety of Use Message reference Goodyear MT/R tires older than 5 years. Govt has directed any of these tires over 5 years old (specifically Goodyear MT/R) get removed before operating due to sidewall blowouts. At least two accidents involving injury are attributed to this in...
www.steelsoldiers.com

From my own experience: out of about 50 tires sold (all are LR "E" and dated 2008/2009) only ~10% of them have failed, so far.
They all start to develop cracks right here, just like this one:
IMG-20190203-WA0008.jpg IMG-20190204-WA0006.jpg

I'm convinced that this happens mainly with the LR E tires (which have a stiffer carcass than LR D), when people put them on heavy vehicles, run them at highway speeds, at relatively low TP's. Plus the fact that old rubber just doesn't flex like when fresh out of the mold.

Besides that we don't know the history of these surplus tires. At the time when GL still used to sell these (by the hundreds of lots, each week) most of them came from HMMWVs which were cut up in pieces. Who knows for how long (maybe years) these vehicles had been standing stationary awaiting their fate, possibly even deflated some.
 
fuzzytoaster

fuzzytoaster

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gringeltaube said:
HMMWV MT/R tires: Some go, some blow....

Goodyear MT/R Tires Safety Message

I received a Safety of Use Message reference Goodyear MT/R tires older than 5 years. Govt has directed any of these tires over 5 years old (specifically Goodyear MT/R) get removed before operating due to sidewall blowouts. At least two accidents involving injury are attributed to this in...
www.steelsoldiers.com

From my own experience: out of about 50 tires sold (all are LR "E" and dated 2008/2009) only ~10% of them have failed, so far.
They all start to develop cracks right here, just like this one:
View attachment 890299 View attachment 890300

I'm convinced that this happens mainly with the LR E tires (which have a stiffer carcass than LR D), when people put them on heavy vehicles, run them at highway speeds, at relatively low TP's. Plus the fact that old rubber just doesn't flex like when fresh out of the mold.

Besides that we don't know the history of these surplus tires. At the time when GL still used to sell these (by the hundreds of lots, each week) most of them came from HMMWVs which were cut up in pieces. Who knows for how long (maybe years) these vehicles had been standing stationary awaiting their fate, possibly even deflated some.
Click to expand...
Agreed. It helps that we don't carry around all the armor package weight and etc too. I have several hundred of the MT/Rs on rim dated 2016/2017 that are NOS. About half have never seen the ground until I rolled them around for inspection. I'm not afraid to use them and tire on rim with run flat is hard to beat for the buy.
 
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M

mgFray

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jake-cutter said:
So where is the best place to get a full set of tires and wheels?
Click to expand...
Can't help you with the wheels, but if you want _NEW_ original Goodyear Wrangler MT (not R), any commercial goodyear dealer can now request them. My understanding is they are not directly orderable, but their rep can get them. (I ordered mine through my local Discount Tire. They would NOT mount them, but ordering was no problem. Took about 3 weeks for them to arrive. They were manufactured about a month before I ordered them.)

I don't know if the MT/R are available or not. They have a new 'enforcer' tire, it might be the replacement for the MT/R.

I wasn't able to find any place for the BFG Baja's new, only surplus.
 
Gcelevator

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mgFray said:
Can't help you with the wheels, but if you want _NEW_ original Goodyear Wrangler MT (not R), any commercial goodyear dealer can now request them. My understanding is they are not directly orderable, but their rep can get them. (I ordered mine through my local Discount Tire. They would NOT mount them, but ordering was no problem. Took about 3 weeks for them to arrive. They were manufactured about a month before I ordered them.)

I don't know if the MT/R are available or not. They have a new 'enforcer' tire, it might be the replacement for the MT/R.

I wasn't able to find any place for the BFG Baja's new, only surplus.
Click to expand...
I asked my tire place/friend that takes care of all my commercial trucks to check them for me. He called me 3 days later and said they are not available from the manufacturer or any place. Supply is dry, i ended up ordering new aftermarket rims and tires. I wanted to keep the original look but to no available.
 
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