Hi, I have a 2000 Fleetwood Terry 26' trailer camper and only used 4 times in four years i had a blowout on each trip! My camper has a tandem axle.The factory sticker on the camper states: GVWR: 8300 lbsGAWR: 4300 lbsTires: ST225/75R/15CTire pressure; Cold/50 lbsI installed 4 new tires when I bought the trailer and are the size shown on the sticker and are ST with load range D. Of course since then an additional 4 new tires.I always felt 50 lbs was far less psi than proper but when I had the tires installed the tire man said he filled them up to the factory recommended specs. I looked at the tires and told him that on the tires its states 65 psi cold. Could this be my problem with blowouts? Too little psi? I've never pulled the trailer with any appreciable extra load. All water and waste water tanks empty, just clothes and food. I tow the trailer level, and use load leveling bars and anti-sway bar, I rarely exceed 65pmh and have never traveled mor than 350 miles to a destination but had blowouts after as few as 70 miles. Thanks

If the tires are LR D and you are only inflating them to 50psi, I would say that this is your main problem. Lots of reasons why tires blow out...tons of discussion about this. But, one of the primary reasons is under inflation.

I can't understand why the factory lable would give a 50psi tire pressure and slap myself for knowing better but blindly accepting the factory tire inflation specs.thanks

Pretty much a rule of thumb (in my opinion) is to always run at the max pressure indicated on the sidewall of any ST series tire on a trailer. Not doing so, you risk overheating them and having them blowout.

Terry26 wrote:I always felt 50 lbs was far less psi than proper but when I had the tires installed the tire man said he filled them up to the factory recommended specs. I looked at the tires and told him that on the tires its states 65 psi cold. Could this be my problem with blowouts?Definitely! You should not be running tires 15 psi under.

Also they rot out from the inside. We had four 3.5 year old tires go in one trip that looked perfectly fine... Including the spare that lived in the front compartment.

Tire pressure & too many blowouts | Good Sam Community

20 Replies

Terry26
Explorer
Mar 30, 2017
Jerry,

You are correct.
Thanks.
MFL
Nomad II
Mar 30, 2017
The 50 psi on factory label, is for load range C. When going up in load range using ST tires, it is best to use tire sidewall max psi. In this case 65 psi. If going to load E, your wheels may not be rated for 80 psi.

Jerry
rockhillmanor
Explorer II
Mar 30, 2017
Check the valve stems!
Some are rubber, some are plastic. There are regulations as to what vehicles need which valve stem.

Old story everyone is tired of hearing but I had one blow out and 2 more flat tires on ONE trip thru the hot hot weather of Houston!

Last flat, tow truck driver showed me they were leaking right thru the failing RUBBER valve stems.

Yup the idiot tire center put rubber valve stems on my MH tires. :R

I replaced them all with "stainless steel" valve stems.

IMHO the majority of these blowout incidents are nothing more than the tire going low while driving and ultimately ending up in a blow out like mine did. Not that the tire is bad.

REPLACE all the valve stems with stainless steel or equal. They are available at all tire stores.
the_bear_II
Explorer
Mar 30, 2017
I always go by the pressure shown on the side of the tire or the chart on the tire manufacturer's website if available.

I always keep my tires at the maximum cold pressure shown on the sidewall. No blowouts.
Terry26
Explorer
Mar 30, 2017
yes, That I knew but.. I'll crank up the psi and hope that does it as I'm certain that was the issue. I'm lucky the blowouts didn't cause me nor anyone else a wreck. Live & learn but for me I'll always trust my experience rather than a label
Thanks
.
eluwak
Explorer
Mar 30, 2017
Also they rot out from the inside. We had four 3.5 year old tires go in one trip that looked perfectly fine... Including the spare that lived in the front compartment.
Boon_Docker
Explorer III
Mar 30, 2017
Terry26 wrote:

I always felt 50 lbs was far less psi than proper but when I had the tires installed the tire man said he filled them up to the factory recommended specs. I looked at the tires and told him that on the tires its states 65 psi cold. Could this be my problem with blowouts?

Definitely! You should not be running tires 15 psi under.
Community Alumni
Mar 30, 2017
Pretty much a rule of thumb (in my opinion) is to always run at the max pressure indicated on the sidewall of any ST series tire on a trailer. Not doing so, you risk overheating them and having them blowout.
Terry26
Explorer
Mar 30, 2017
I can't understand why the factory lable would give a 50psi tire pressure and slap myself for knowing better but blindly accepting the factory tire inflation specs.

thanks
downtheroad
Explorer
Mar 30, 2017
If the tires are LR D and you are only inflating them to 50psi, I would say that this is your main problem.

Lots of reasons why tires blow out...tons of discussion about this. But, one of the primary reasons is under inflation.

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Tire pressure & too many blowouts

20 Replies

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