Proper Air Pressure for Kenda Karrier S-Trail ST145/R12 Tire

Question

Question:

what is the recommended air pressure for a Karrier S-Trail ST145 R12 tire. Using the on a single PWC trailer. PWC is about 900 pounds. Your help is appreciated. Thank you

asked by: Kevin S

0

Expert Reply:

Unlike passenger car tires that have a certain range the tire needs to be inflated to, trailer tires should always be kept inflated to the maximum air pressure listed on the sidewall of the tire.

We offer the Kenda Karrier 145/80-12 (aka 145/R12) in a load range D or E. A load range D tire like # AM10130 has a capacity 1220 lbs when inflated to its max pressure of 65 psi. The load range E tire, part # AM10140 has a capacity of 1520 when correctly inflated to its max pressure of 80 psi.

I've linked you to our Trailer Tire FAQ article.

expert reply by: Mike L

0

Answer 1

Yes, so long as it is just a temporary spare for an emergency you can use the 5.30-12 tire when switching to the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire #AM10130. But in the event you have to use the spare you will want to switch to the…

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Answer 2

Yes, a 5.30 x 12 tire will fit the same rim as a 4.80 x 12 tire. Both tire sizes fit on a 4 inch wide rim. There are a couple of things to consider when changing tire sizes. First, the larger 5.30 will be approximately 1.4 inches taller than the 4.80…

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Answer 3

The torque spec depends on the lug nut type, wheel size, and material. For the Kenda Karrier S-Trail ST145/R12 Radial Tire w/ 12" Galvanized Spoke Wheel #AM31202 the torque spec would be 75-85 ft-lbs. I have attached a chart below for your…

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Answer 4

Thank you very much for the information and photos! The best replacement we have for that axle is the Timbren Axle-Less Trailer Suspension System #A35RS545 which is rated for 3,500 lbs and comes with idler hubs that have a 5 on 4-1/2" bolt…

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Answer 5

Since both a ST145/R12 size tire, like the Kenda Karrier S-Trail #AM10130, and a 5.30-12 size tire, like the Kenda K353 #AM10068, fit a 12 inch wheel, a ST145/R12 size tire can replace a 5.30-12 size tire. Keep in mind that these tires do have…

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Answer 6

Yes, the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire #AM10140 referenced in your question will fit the same 12 inch wheel with a 4 inch width that your existing 4.80-12 size tires are mounted to. Just note that the ST145/R12 tire will be…

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Answer 7

The 5.30-12 tires, being wider, are going to make more contact with the road. This means that the noise, and heat build up will be higher than a 4.80-12 tire but the rolling resistance will actually be less because the tire is larger diameter. The…

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Answer 8

I can end this debate for you real fast! Trailer tires, which will have an ST in front of the size, should always be inflated to the maximum psi indicated on the tire. Trailer tires usually do not have a recommended and maximum psi indication so I am…

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Answer 9

This is a question we get pretty frequently as there is definitely some opposing ideas and incorrect information out there in the world of the interwebs. That said, unless otherwise stated by the tire manufacturer*, you always want to run your tires…

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Answer 10

The max tire pressure rating isn't the same for all 145R12 trailer tires so you'll need to look on the actual tire sidewall for the load range which should also state the max tire pressure rating. We recommend filling the trailer tires to the…

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Answer 11

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 12

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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Proper Air Pressure for Kenda Karrier S-Trail ST145/R12 Tire

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