What the tire says. And why. I have a bumper pull and the trailer says 65psi, but the tires say 50psi.
Thanks!
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We aired up my trailer tires recently. My tires call for the same as the tag in my trailer.
I would be cautious filling tires beyond the what is recommended on the tire itself
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Usually what is written on the tire is the MAXIMUM that is safe for that tire.
If that is less than what the trailer manufacturer specifies, it my be that you have the wrong tire for that trailer.
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We always go by the recommended PSI on the tire itself. And, always be aware of the date on the tire itself.
I would fill based on the tire mfr’s recommendation - they know best. I have an imported trailer and couldn’t get the same brand of tire in the USA that the trailer came with. It’s a very close replacement, but the PSI is slightly different (higher) than the originals. You bet I’m going to go with the tire mfr reccs.
why do trailer manufacturers even put a sticker with tire psi’s on the trailer?
Regulations ?
So you know what tires you need to buy?
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To answer your question: do not inflate a tire beyond the maximum printed on the tire sidewall. And usually that is ‘cold’ so if you check the pressure after driving a while it will be higher as they heat up – that’s fine.
BUT… if your tire says max 50 psi cold on the side, that is a load range C tire.
That your horse trailer says 65 psi says they intend for you to be using load range D tires.
How big is your trailer / what is the GVWR on the plate on the trailer? The tires you have may not be the right ones for your trailer.
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