Hello all! I purchased a new Living quarters horse trailer. Total length I beleive is about 35 foot with a 12 ft short wall living space... VERY COOL!!! I noticed today it has Load range G tires I believe are called "Road Boss" . Cold PSI is a max of 110 PSI. What would you run the trailer tires at. I haul 3 horses and have all the water etc on board... Thanks!!

 

i have always set my pressures by the tire wear. take a large ( carpenters type) crayon or grease pencil and draw a line across the tread. drive a couple of hundred yards on flat smooth pavement. if the middle of the line wears away then too much pressure if the edges go away then not enough. repeat until you get an even amount of wear across the entire tread patch. i have done this with all of my vehicles and tend to get better than average tire life. just remember to write it down. you can also do this to the truck empty and when pulling the trailer to make the necessary adjustments for the load you carry.

your tire when inflated to the max of 50 psi on an unloaded truck should only hit in the middle. when loaded to the max it should flatten out to the correct contact patch. i used to see alot of this with guys and their lifted trucks on huge "swamper style" tires ... lots of tread around the edge but bald as a baby's butt in the middle. tire sidewall and vehicle door jamb ratings are only an average and a place to start. i have never gotten flat wear on a set of truck tires running the same psi in front and rear tires when empty.

 

Thanks, these tires are called " Load boss" tires. I need to search the internet and see what I find... Never heard of them.... One has 75 pounds in it, one has 85, the other 2 have 90!!! SO whomever mounted them needs to go back to math class. I will researcha nd find the correct pressure and set them all the same! LOLOLOL

 

Thirty-five foot of trailer is a lot of wagon.

Those 14-ply/LR-G tires were put on there for a reason.

I would run them at 110 PSI at all times.

Any less and you may as well just run 10-plys.

Heavy-duty tires will accumulate tremendous amounts of heat at lower inflation pressures.

You can't govern trailer tire pressures in the same manner that you govern truck tire pressures.

On a trailer that long, you will be lucky to wear all the tread off a tire before it fails for other reasons.

I would keep plenty of air in them.

 

OR, the tires were bought in bulk, pre-mounted, and have laid in some trailer-manufacturer's ware-house for a couple years.

The place where you bought the trailer should have checked the pressures, before they let you leave with it.

Most fancy trailer sales places know so little about what they are selling that it is a joke.

If I were buying a trailer, the first things I would want to know are "how big are the axles, does it have vacuum-over-hydraulic brakes, and what size/ply are the tires??"

The walk-away factors are:
any kind of electric brakes = walk away
too small axle ratings = walk away
too small/light tires/wheels = walk away

Any decent trailer, even small trailers, will at least have 8-lug 16" wheels.

 

OK, the tires are 235/85/16's and are mounted on DEXTER brand 8,000 pound axles. I will put them to 110 PSI tomorrow. We shall see! Thanks for all the advice guys!

 

Most websites for a company will have a weight to pressure chart. Figure what your highest weight will be in the trailer. Add to that the trailer weight minus the pin/hitch weight and divide by four. That is the weight on each individual tire. Pump it to the recommended pressure from that chart.

Bob

 

I would take them off & throw the dang things away, we have a sundowner that's very similar & couldn't keep the "G" rated 14 ply tires on it at 110psi. started running "E" range 10ply light truck tires at 80psi. & haven't blown a tire yet! the Sundowner rep at the CMSA Eastern US Champoinships in Murfreesboro Tn told me that the "G" rated tires were only speed rated to 62 mph or so?? don't quote me on that it was less than 65mph, but don't remember exactly what he said?? & he claimed that that was the reason we were having so much trouble? ours is a 4-horse & I think 32ft. has a 10 ft. shortwall,full living quarters, so it's a rather healthy load too, in the first 6 times I used it I blew 4 of the 5 original 14 ply tires, theres still one left on it & the other 3 on the axles & the spare are all 10 ply, so far so good, no probles with any of the "E" rated tires & it's been pulled from SW va to Murefreesboro Tn, Harriman Tn, Gainsville Ga. twice, & several miles here close to home with no problems???? I just lost all faith in the "G" rated tires after having to change out 4 of them on the side of the interstate in the wee hrs. of the a.m.! just my experience, but if you're gonna run them, I'd gauge all of them up to teh 110psi. that's called for! too much or too little pressure will cause problems too! good luck & enjoy that beast of a trailer!!! Dusty

 

110 psi for a tire is starting to get up there, of course it's low pressure for a commercial jet tire. The lowest jet tire I can think of is a DC9/MD80 front (nose gear) tire and it's 145-155 psi. An Airbus A320 nose tire is 178 psi and is about the same size as the ones on your trailer. These tires generate a lot of heat plus there is the heat from the brakes on the main gear tires. My point is these tires ALL use nitrogen in them, it's much more stable than compressed air and maybe that's the reason Dusty had problems with his.... The air expanded due to the higher speeds and blew the tires apart. Also if you plan on using compressed air Good luck getting them to 110 psi, I run my compressor at 125 psi cut off and I hate taking my truck and 5ver up to just 80 psi.

 

Nitrogen vs. air in truck tires is basically a gimmick. Some very minor theoretical benefits that are... even theoretically, minor - unless your compressor lives in a lake, heh. Even if you filled entirely with pure nitrogen, with a freshly mounted tire - nobody sucks out all the air that started in there, at sea level, you'd still have 14.7 psi of regular air. Regular air is 78% nitrogen, regardless.

I'd run them at 110, unless you're travelling empty.

The commercial tire service guys pull the valve core to fill faster.

 

My 30 foot 4 horse has had Load range E on it since I've owned it. They will dry rot before I could ever wear them out and I ride somewhere every weekend. I run 65 pounds in mine year round.

 

Na... my compressor hides under the stairs in my garage However I'm sure most would agree it's not the cut off pressure it's the cut in pressure that's the problem when inflating to higher pressures with an air compressor. I find as the tire gets up in pressure the filling slows to almost a stop and I have to bleed off air from the tank to get it to cut in. (80psi). I agree with the fact that nitrogen is a waste (in most cases) but in commercial aircraft and maybe in Dusty's case nitrogen might just be the answer.

 

Very well spoken.


I have been thinking of painting one of our air tanks green and sticking some nitrogen stickers on it, then offering to fill the customers tires with it for free, if they so desire.

After a few have tried my "nitrogen", and word gets out, I bet I will have them lined up at the door, waiting to try some in their tires.

John Q. Public is, for the most part, pretty gullible.

 

My LQ horse trailer also has G rated tires. The only issue is the rims only support E rated pressures (80 PSI). So I run mine at 80 PSI. They will still out perform a E rated tire at 80 PSI. If you want to run 110 PSI you will need to upgrade the rims with a nice set of ALCOA trailer rims.

 

The new Goodyear RST G rating tire is a workhorse. It is far superior from all construction data than an LT. Much stronger sidewall, rounded tread design to reduce dragging in tight turns and is designed for running straight. It's recommended high end speed is 75 mph. I have almost 50K on mine and they still look new and they are regroovable if I ever wear them down far enough to think about that. Low speeds on the new Goodyear G rated ST's is old thinking - - I can't speak for some other manufacturers. Pick one up, then pick up the same size tire by the same manufacturer in an LT and you will become a believer on how much more "stuff" is in that ST.
Bob