runflats, run flats, run-flats, HOW do I know if I have 'em?

[NormB]

Bought an M998 HMMWV in early October and the seller told me he thought the tires had run-flats/runflats/run flats in them, maybe.

Why the variations? Because I've looked around on this site and others trying to figure out how I figure out if I do or don't have the things short of deflating, disassembling, looking around and reassembling all of 'em.

IS there a "simple"(r) way of doing this?

Thanks in advance.

Norm

 

[Jbulach]

Let the air out of the tire and see how far it squats


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[gimpyrobb]

Let the air out of the tire and see how far it squats


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This.

 

[Action]

you either let the air out or remove the assembly and weigh it. if it weighs about 150#. it has a runflat.

 

[fllaw1]

that is correct with a Goodyear MT AND A 12 bolt wheel should weigh in at 152 - 153 lbs with a runflat

you either let the air out or remove the assembly and weigh it. if it weighs about 150#. it has a runflat.

 

[doghead]

X-ray

 

[NormB]

Let the air out of the tire and see how far it squats


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I thought of that, but wasn't sure how much air I could let out safely before I notice the truck not "sinking" anymore or the bead separates.

Weighing, THAT I can do while I take the wheels off one at a time to check/drain/fill the geared hubs.

Thanks everyone.

Norm

 

[Retiredwarhorses]

Take the tire off and split the rim...look inside, lol that's one way to be sure.
deflate them....if the rim hits the ground, it ain't got RF's

 

[fllaw1]

Had some messages, as it wasn't believed the run flats weighed as much as I said. So I used a brand new tire this time which weighs more.
12 bolt 16.5 in wheel with new Goodyear Wrangler M/T and runflat comes in at 164 LBS.

 

[StackJ]

so while we're on the topic of tires, what is the correct pressure for highway travel?

 

[Action]

so while we're on the topic of tires, what is the correct pressure for highway travel?

What do you want?
smoother ride?
more miles per gallon?
slower tread wear?

 

[StackJ]

How about what is recommended for _normal_ highway driving. Is there such a spec?

 

[Videris]

How about what is recommended for _normal_ highway driving. Is there such a spec?

40 psi

 

[Action]

psi data is in the TM....
all options listed have different pressures front and rear.

from 20 - 50 for load range D tires
from 18 to 50 for load range E tires
higher pressures used with more weight.

 

[juanprado]

ps magazine chart for tire pressure on newer models