dilligaf13
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I'm 99% sure they didn't but does anyone know if the military ran run flat 14.00R20 tires on any of its standard M939A2 trucks?
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Use the 3 piece Hutchinson runflats that bolt together. Much easier to install. Rubber ones are too much work unless you have heavy equipment or the ratchet tool. Feltz tire has the 3 piece inserts.Yeah, I knew the gun trucks ran run flats but they weren't exactly a standard truck. I've never dealt with any of the Frankenstein ROPS trucks so I was unaware they had them but it makes sense. Anyone every retro-fit their trucks with them or is the PITA mounting and balancing them too big of a turn off?
It reduces heat without it it'll blow in the hot summerI was able to pick some 3 piece run flats from Feltz. Seems like there’s some sort of lube on some of them. Is this lubricant necessary for anything (heat dissipation like the rubber 1 piece run flats) or is it just aid in ease of installation?
.What I saw was without the lubrication, in a run flat (emergency situation) the tires will last 1 mile. With lubrication, in the same situation the tires will last 30 miles. I don’t remember what size tires/vehicles this applied to but I’ll try to find the literature again and post it on here.
I’m looking to start by putting the runflats in the 2 steering tires I’m already replacing as an added layer of safety in the event of a blow out, not to drive on, so I’m not worried about driving for 30 miles on a flat tire. I just want to make sure that failing to add lube won’t cause heat during normal operation.
If I have to drive on a flat tire I’m replacing it regardless of run flats or how far I drive on it. I’ve seen too many blowouts from broken sidewall belts and the results ain’t pretty.
Does anyone know where I can purchase the run flat lubricant or an inexpensive alternative?
thanks
When using sand or any other low pressure settings on the ctis, the tire and runflat can and do connect especially with flexing sidewalls in offroad environmentsIt should be noted that the runflat inserts (all versions) are always much smaller in diameter than the inner tire. So, for the 395s and 14.00s it takes about 5" for the tire to actually touch the RF, so that would only occur after much deflation, e.g. during emergency use; or a mayor air leak, after a tire puncture.
In normal use there is no contact between tire and RF, ever.
The only reason for that "grease" layer to be there is to reduce heat due to friction, once the tire inside started "rubbing" on the RF.
(to Wes: I know you are talking from your own experience, but I've yet to find any technical literature confirming that it also keeps tire temps lower, in normal conditions...)
So, in case of a blow-out or sudden loss of air AND with the proper lubricant in place, a safe slowdown run from 60mph to stop - and/or driving in limp-home mode (for a few miles) is still possible.
Without any lube the tire would probably catch on fire, pretty soon.
Sure, but that would be more like momentary contacts only, at low speed (<15mph). And it is clear that with extreme low TP the increased flexing work alone will create a lot of heat in the tires. Not exactly what I was referring to as "normal use".When using sand or any other low pressure settings on the ctis, the tire and runflat can and do connect especially with flexing sidewalls in offroad environments
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