Truck Tire Partial blowout?

[TonyF]

I have an F700 single axle dump. Today with a heavy load on I pulled out into traffic and was zipping along ~60 trying to keep up with the traffic flow when I heard a loud blowout pop. I figured I lost one of the duals in the rear. I slowed down and limped to my destination and dumped the load. I checked the tires with a hammer, none were flat, they all had air. I got home tonight, and the right outer dual only had 50 psi in it, when I left home it had 120. The other tires had 120 PSI. This tire and the others are physically fine, in fact they are about 80% thread with the normal cuts and gouges.

I put 100 PSI in it and will check it in the morining before I go out.

I forgot to mention that they are one peice steel wheels, not split-rims.

Anyone experience anything like this? Perhaps the bead popped and reseated itself?

Thanks

Tony

 

[Bird]

I've never heard of such a thing. Let us know what you find out. Is it possible the blowout you heard was on another vehicle in the traffic?

 

[TonyF]

I've never heard of such a thing. Let us know what you find out. Is it possible the blowout you heard was on another vehicle in the traffic?

Me neither! But its the only thing I can think of. The was no traffic immediately close by, I suppose it could been someone else, then again no one pulled over.

 

[zzvyb6]

Noise was not from a tire. A backfire maybe???

 

[tommu56]

I had a similar experience with a trailer tire and only figured bead was sealed but not seated till it got warmed up and "POPED" seating it, scaring the bejesus out of me.

tom

 

[Bob Rooks]

Overloaded and/or underinflated tires build up an awful lot of heat resulting in cord separation (delamination) in the carcass and eventual total failure, which closely resembles road kill. What you may have heard was the first stage of the process. If I were you I'd have that tire dismounted and closely inspected. Your insurance adjuster will love you for it.
:thumbsup:

Mathematically speaking:
Overloaded / underinflated + high speed = high heat + accident waiting to happen.

 

[flyingcow]

Overloaded and/or underinflated tires build up an awful lot of heat resulting in cord separation (delamination) in the carcass and eventual total failure, which closely resembles road kill. What you may have heard was the first stage of the process. If I were you I'd have that tire dismounted and closely inspected. Your insurance adjuster will love you for it.
:thumbsup:

Mathematically speaking:
Overloaded / underinflated + high speed = high heat + accident waiting to happen.

A bad will tire(low pressure) will ruin a good tire on a set of duals.

 

[TonyF]

Overloaded and/or underinflated tires build up an awful lot of heat resulting in cord separation (delamination) in the carcass and eventual total failure, which closely resembles road kill. What you may have heard was the first stage of the process. If I were you I'd have that tire dismounted and closely inspected. Your insurance adjuster will love you for it.
:thumbsup:

Mathematically speaking:
Overloaded / underinflated + high speed = high heat + accident waiting to happen.

Bob, I believe you nailed it - a partial separation, I had thought about that, but the tire looks OK. I've had blowouts before, but never anything like this. Anyway, the tire bled down overnight to 50 PSI so there is definitely something wrong with it. Monday it goes to the tire shop.

 

[Bob Rooks]

Carcass delamination usually occurs where the most heat is developed, and in the case of dual wheels it's the sidewalls that are next to each other where there is poor heat dissipation, and if the tires are underinflated/overloaded they will touch and scuff and only exacerbate the problem. The main source of heat build up in a tire, aside from road friction coefficients, is the flexing of the sidewall which, combined with speed, builds heat at a more rapid rate.
The onset of delamination can be witnessed by a subtle bulge in the sidewall, which can be difficult to detect when it's on the inside of the duals.

 

[crazyal]

Did the pressure go any lower? I've had air pockets trapped between the tube and tire that once the air bleeds out the pressure in the tube drops but doesn't go any further. I've never had one pop though. What did the tire shop find?