You have gotta see this .

[20 20]

When I was in the military we would work on split rims all the time. Watched a guy get shot about 12' straight up one day because the metal rim blew off. He would replace the rim, turn the tire over, sit on it and start filling. That was the last time he did that, after he allways used the cage. I have seen many results of what a split rim can do. Even with the protection of a cage they can be a terror.

 

[Cidertom]

Yes, under inflated can cause it. As can brakes, fire and bad bearings. On the fire protection side I teach the only way to approch a suspect vehicle is from the corners. The tires can blow at any time. On cars and light trucks the shock absorbers in bumpers can fail and blow the bumper out. Both tires and bumpers have seriously hurt firefighters I have known.

Didn't know about the 22 hour delayed explosion risk though. WOW.

Training material for the next safety class.

 

[/pine]

I've seen lots of brake rotors glowing so hot you could see through them...I wonder why it never has the same effect on the tires?...some of that (rotor) heat has to radiate into the wheel ???

 

[hitekcountry]

Ever run over a road gator?

Most people think those are caused by failed retreads. Not true.

Had a tire come apart on me at 70 mph, it was the right rear on an 87 GMC Jimmy. It was not a retread. I was in the fast lane and two thing stood out in that experience, first there was no noticeable lose of stability and the second thing was I was amazed at how fast the cars behind me dropped back away from me, one second there were cars behind me and the next second they were gone.

Whether the tire was under inflated or not, I don’t know. But it didn’t just loose some tread, this tire ruptured as if it had exploded.

 

[JB4310]

Had a tire come apart on me at 70 mph, it was the right rear on an 87 GMC Jimmy. It was not a retread. I was in the fast lane and two thing stood out in that experience, first there was no noticeable lose of stability and the second thing was I was amazed at how fast the cars behind me dropped back away from me, one second there were cars behind me and the next second they were gone.

Whether the tire was under inflated or not, I don稚 know. But it didn稚 just loose some tread, this tire ruptured as if it had exploded.

Wonder how bad the control issue would be, had it been a front?

Always feared a front high speed blow out, figured a rear would not be near as bad, but you're saying you hardly noticed it?

JB

 

[Eagleview]

Did it deflate or did it just throw the tread off is the question ?

 

[Matt_Jr]

That's some scary stuff!! Just today I had to use gum cutter to bead up 4 pick up truck tires for a customer... I've done it several times. I'll probably do it again, but I'll never heat up a rim, or weld on one while the tires on it.
I read an article in a magazine 10 or so years ago about retreaded tires being much less likely to be a problem than new tires. All tire treads found on the side of the road were studied, and 90% of the treads were from tires that were not retreaded.
All blowouts on tires happen from the tire being under inflated. The blowouts happen because lack of tire pressure causes the tire to flatten(duh) and causes excessive sidewall flex while rolling at high speeds. This causes friction within the sidewall with the nylon and rubber, and increases the temperature of the tire, and air inside the tire. This in turn raises the pressure inside the tire until the structure fails causing a blowout. This is the reason you should check your tire pressure at least once a month. Not only will it help you find out if you have a nail in your tire, but also, when the temps change outside, so does the pressure in your tires. If you've been driving until your tire is warmed up before you check your air pressure, you should add 4 psi to the pressure written in your owner's manual, or on the door.

 

[hitekcountry]

Did it deflate or did it just throw the tread off is the question ?

No it didn't just lose some tread, this tire exploded, I came apart, you could see inside the tire.

 

[Taylortractornut]

I ve used either and also welded on a rim. But always when welding broke the bead and put in a 1 by 4 to keep and air space for cooling there. I was between jobs and worked for a friend servicing trucks and trailers. He was the tire man. He was gonna bend down to pu take the valve stem out of a log trailer tire and it blew out. We smelled hot brake and I went to get the spotter truck before it happened I saw him leaning over when it went out. I figured it had killed him, He was alright after a good fit.
Low tire pressure and bearing and brake failure are the usual causes Ive seen in tire failures.

 

[EE_Bota]

Ever run over a road gator?

Most people think those are caused by failed retreads. Not true. Take an up-close look some time. You'll note that they generally include the wire as well as the tread material.

Most (possibly all) blowouts on truck tires are caused by running under inflated and overheating the tire.

I look at every "road gator" I see. I have been doing this for 18 yrs. If I ever see one that does not have cords, I will stop and pick it up for analysis. To date, I have never seen a tread without cords. Many people think that road gators are caused by the retread industry. This is simply not true.

I am not familiar with the exact mechanism of pyrolysis of tires, but it should be remembered that there is more than one design on the books for rocket boosters made from nothing by rubber, with a hollow tube down the middle to introduce oxygen.