Tire Pressure (Trailer stamp vs tire info)

[gonzo628]

So, my 3124 has Carlisle Radial Trail tires (225 75/R15 LRE) on it. Their max pressure is 80psi. The trailer stamp says the trailer was spec'ed with 225 75/R15 LRD (max pressure is 65psi. My question is... Which do I adhere to?

How do I tell what the rim was spec'ed for? (Another member mentioned the rim -in his situation - being insufficient for the tire rating).

[Kidkraz]

Go by the current tiremarkings on the side wall, not what the trailer sticker shows.

[gonzo628]

Originally Posted by Kidkraz

Go by the current tiremarkings on the side wall, not what the trailer sticker shows.

I get that. If the trailer were LRE, but the tires were only LRD, I would not surpass the 65psi. I guess I am just not sure of 2 things:

1) Should I run at max pressure?

2) Does the stamp in any way correlate with rim limitation? Another member indicated he had problems because his tires were LRE and the rim (spec'ed for LRD) could not hold the pressure (allowing the tire to fail).

[Craigrrr]

Originally Posted by gonzo628

I get that. If the trailer were LRE, but the tires were only LRD, I would not surpass the 65psi. I guess I am just not sure of 2 things:

1) Should I run at max pressure?

2) Does the stamp in any way correlate with rim limitation? Another member indicated he had problems because his tires were LRE and the rim (spec'ed for LRD) could not hold the pressure (allowing the tire to fail).

If you really load the TM with a lot weight I would run at 75-80

otherwise I think 65 would be fine and not mess up the tires

[TrailManorMan]

Most rims do have a psi rating, I'd be sure to know what it is before putting to much pressure on the rim. The old weakest link theory need to be known.

[Padgett]

New trailer wheels have a sticker or can check model number which should be stamped in the wheel. I would use at least a 15x6.

These were returned when I saw the wheel sticker.

ps I would not run over 65 psi, trailer would bounce. Check the rating of the LRD tire at 65 then take the weight of the trailer, subtract the tongue weight if not a WDH, divide by two. If the max load of a LRD is more, run 65. LRE is just stronger, not bigger.

[Bill]

I think we are mixing up a number of things here.

The label on the trailer tells you how it was equipped when it left the factory. If you want to change to more capable tires, so much the better. The factory sticker is no barrier to that.

As Padgett has pointed out in another thread, tires labelled Load Range E are only Load Range E if they are inflated to 80 psi. If they are inflated to 65 psi, their load-carrying capacity is still Load Range D. And by the way, LR-D is plenty for a TM.

I run my LR-Ds at 60 psi instead of the max 65 psi. At 65 psi, they are too hard and shake things apart. At 60 psi they still have plenty of load-carrying capacity, but are a bit softer.

The wheels (aka rims) are stamped with a max pressure rating, but in my limited experience, the stamp is on the inside of the wheel - the part you can't see when the tire is mounted. But you need to know this rating before you start putting high-pressure air into them. We have had some forum members who were surprised when their wheels were stamped 50 psi.

Bill

[gonzo628]

Originally Posted by Bill

I think we are mixing up a number of things here.

The label on the trailer tells you how it was equipped when it left the factory. If you want to change to more capable tires, so much the better. The factory sticker is no barrier to that.

As Padgett has pointed out in another thread, tires labelled Load Range E are only Load Range E if they are inflated to 80 psi. If they are inflated to 65 psi, their load-carrying capacity is still Load Range D. And by the way, LR-D is plenty for a TM.

I run my LR-Ds at 60 psi instead of the max 65 psi. At 65 psi, they are too hard and shake things apart. At 60 psi they still have plenty of load-carrying capacity, but are a bit softer.

The wheels (aka rims) are stamped with a max pressure rating, but in my limited experience, the stamp is on the inside of the wheel - the part you can't see when the tire is mounted. But you need to know this rating before you start putting high-pressure air into them. We have had some forum members who were surprised when their wheels were stamped 50 psi.

Bill

thanks for the replies. I think the confusion came in regards to the as built (stamp) rating vs the on rim tire rating. As you mentioned, other people have been surprised by the rim being the weakest link. does it stand to reason that if "as-built" (trailer stamp) says LRD, the rim is LRD?

[Bill]

In my mind, yes, it stands to reason, assuming the trailer is still equipped with the OEM wheels. Doles the trailer stamp also say 65 psi?

I wasn't aware that TM was putting LR-D tires on any TMs in the 2006 time frame.

Bill

[gonzo628]

Originally Posted by Bill

In my mind, yes, it stands to reason, assuming the trailer is still equipped with the OEM wheels. Doles the trailer stamp also say 65 psi?

I wasn't aware that TM was putting LR-D tires on any TMs in the 2006 time frame.

Bill

The stamp does say 65psi. If I have time, I'll edit and upload the picture I took...