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Old 08-02-2012, 09:24 AM   #31
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Originally Posted by boubou View Post
Hey! On the road now and TPMS decided
To show correct pressure /)
Are you texting and driving!!!!!!

Eyes on the road; hands on the wheel!
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Old 08-02-2012, 09:29 AM   #32
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Originally Posted by Mickeetwo View Post
Load Range Ply Rating Max Load Pressure
B 4 35psi
C 6 50psi
D 8 65psi
E 10 80psi
F 12 95psi
Load range and plies are not accurate anymore. The number of plies depends on the material used to construct the ply. New materials allow manufacturers to keep the load range with less plies.
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Old 08-02-2012, 09:42 AM   #33
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Originally Posted by herk7769 View Post
Load range and plies are not accurate anymore. The number of plies depends on the material used to construct the ply. New materials allow manufacturers to keep the load range with less plies.

I have to respectfully disagree with you on this one. The load range is still the same as posted by the manufacturer and those numbers are current.

Today's load range/ply ratings do not count the actual number of body ply layers used to make up the tire's internal structure, but indicate an equivalent strength compared to early bias ply tires. Most radial passenger tires have one or two body plies, and light truck tires, even those with heavy-duty ratings (10-, 12- or 14-ply rated), actually have only two or three fabric plies, or one steel body ply.
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Old 08-02-2012, 10:08 AM   #34
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Originally Posted by herk7769

Are you texting and driving!!!!!!

Eyes on the road; hands on the wheel!
Hahahah! No way! I am the Co-Pilot
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Old 08-02-2012, 12:19 PM   #35
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Originally Posted by Mickeetwo View Post
I have to respectfully disagree with you on this one. The load range is still the same as posted by the manufacturer and those numbers are current.

Today's load range/ply ratings do not count the actual number of body ply layers used to make up the tire's internal structure, but indicate an equivalent strength compared to early bias ply tires. Most radial passenger tires have one or two body plies, and light truck tires, even those with heavy-duty ratings (10-, 12- or 14-ply rated), actually have only two or three fabric plies, or one steel body ply.
Oops. What I meant to say; but it came out wrong; is that plies and load range are not implicit.

For example your list implied that a load range D tire has 8 plies.
No question that a load range D tire will handle 56PSI.
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Old 08-06-2012, 12:20 AM   #36
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Originally Posted by herk7769 View Post
That is a very good question. The rims should be stamped with their maximum PSI.
Had the wheels off today. Detailed inspection revealed nothing that would indicate a max tire pressure. Lot's of manufacturer data, "made in China" and a cute little pentastar (but of course), but no inflation data. The wheels are OE upgrades and come equipped with direct TPMS and aluminum valve stem. Safe max pressure? Again, good question and likely a crap shoot without a peek into the original engineering.
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