What Tire Pressure Does Trailer Tire Need, PSI Listed on Tire or on Trailer Frame

Question

Question:

my Flagstaff says 55 psi cold, but the tires I just bought from etrailer says 95psi. Whats correct?

asked by: Dan S

1

Helpful Expert Reply:

With tire pressure you have to go by the pressure rating that's listed on the tire sidewall. Most likely your old tires were of a different size or Load Range and that's where the 55 psi rating came from.

If you don't inflate your trailer tires to the max figure listed on the sidewall they won't have the full capacity and they most likely will get hot and fail as well.

expert reply by: Jameson C

1

Answer 1

Congrats on the new trailer! However you need to know the loaded tongue weight of your trailer, as the dry weight is not a useful figure. With your trailer fully loaded like you'll be towing it use either the scale method in the below help…

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Answer 2

An underslung trailer coupler is one that attaches to the bottom of the trailer frame and an overslung one is one that attaches to the top of the frame. Measuring is not required if you just take a look at your coupler and see where it attaches to…

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Answer 3

When determining the correct spring bars for your trailer you will need to take into account the weight of gear loaded behind the rear axle of the truck and the additional tongue weight loaded in the trailer. I believe bigger is better and safer so I…

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Answer 4

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 5

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

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Answer 6

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 7

Load range B trailer tires are going to have a lower capacity than C load range tires. Basically that, psi rating, and the ply rating are the only differences. A higher load range tire would last a little longer than lower load ranges of the same…

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Answer 8

To get the B&W Patriot #BWRVK3200 to work with your 2006 Dodge Ram you're going to need a set of 5th wheel rails #DM8552016-71. These rails are custom fit to your vehicle so they'll just bolt right up to the frame. It is worth mentioning…

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Answer 9

Your math is correct in your trailer weight load example. If a fully-loaded tandem axle trailer weighs 4000-lbs then each of the 4 tires will bear 1/4th of that load, or 1000-lbs. In this case a tire rated for 1300-lbs would provide a good safety…

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Answer 10

The three most common lug stud sizes for a trailer are 1/2"-20, 9/16"-18, and 5/8"-18. In order to make sure you get the correct lug nuts you need to measure the lug studs on the trailer now as we have no way to look this up for…

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Answer 11

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 12

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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