Tire pressure

Since the label on the trailer states 50 psi, that indicates the trailer came with load range C tires. Either you or someone else ( perhaps even the manufacturer ) installed a higher load range D tire.

Max inflation pressure for LR C is 50 psi
Max inflation pressure for LR D is 65 psi

If it were mine, I would ensure there are snap in metal valve stems, and run 65 in them.

Someone is about to come on here though, and pick a fight with my statement ;)

Let the debate begin. It's gonna run the gamut from, "your wheels are going to explode", to "you should bought a one ton dually, and put load range G tires on it". Or something like that.

Actually the label on the trailer reads load range D 50 PSI. I just bought this rig and all others I've had I ran 65 PSI.

The tire has no clue as to the weight of your trailer and max tire pressure is just that, max for the tire. Weigh the trailer and use that to find the right PSI. I bet the sticker on the TT is close.

That's strange, I have not heard of a D range tire at 50 psi.

My ST 205's are rated C at 55 psi and D at 65 psi. I would definitely check with the tire maker.

Steel valves are used with 85 psi. tires so the 65 psi is a piece of cake. I still have the plain rubber one for my D rated tires.

I just now read the inspection sheet from the dealer we got it from and they filled them to 65, so 65 it is. Thanks all.

LOFAT36, I think you got it right, but I would look on the tire for max lbs. just to make sure.

rbpru wrote:
That's strange, I have not heard of a D range tire at 50 psi.

My ST 205's are rated C at 55 psi and D at 65 psi. I would definitely check with the tire maker.

Steel valves are used with 85 psi. tires so the 65 psi is a piece of cake. I still have the plain rubber one for my D rated tires.

Our friend from Indiana is in fact correct that rubber snap in valve stems are rated for up to 65 psi. That is their upper limit though, so I go up to the next higher rated stems, call it, just for peace of mind.

Here is a description of the different stems we are dealing with:

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=208

ps, here is an interesting little back story on all this. Earlier this year, I bought another new horse trailer. The sticker on the trailer and the factory sales brochure stated the trailer comes with load range D ( 65 psi ) tires. Oddly enough, when I got the trailer home to the barn, I noticed the factory had installed load range E ( 80 psi ) tires on it. And yet, it had "65 psi rubber valve stems".

Go figure.

Alabama Jim wrote:
LOFAT36, I think you got it right, but I would look on the tire for max lbs. just to make sure.

Yes I checked the tires and they require 65 cold. Thanks, Marty