Can Trailer Tire Size 5.30-12 be Replaced with 145/80-12

Question

Question:

I currently have ST530-12 on my trailer and they wear alot, can I change these to a 145/80-12 Radial for improved wear

asked by: David K

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Expert Reply:

The tire size of 145/80-12 fits on the same wheel size as the 5.30-12 so yes you could go to the 145 size. It's actually a tiny bit shorter in diameter too so there would be no need to check for clearance either. For a radial in the size you want we have the part # AM10130 which has a Load Range of D and has a higher speed rating of 81 mph.

Normally tire wear is due to alignment issues or the trailer being overloaded so you might check that on your current setup as well.

expert reply by: Jameson C

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Answer 1

Yes, but not by much. The ST145R12 tire size is 5.7 inches in width whereas the 5.30-12 is 5.6 inches wide.

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Answer 2

For a single axle trailer, you want the shackle strap to be able to move so that you have the spring deflection needed for your suspension. Angled like the photo or even almost vertical is fine you just don't want the shackle strap to bind…

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Answer 3

The proper tire psi for trailer tires (ST) is listed on the tire as the max psi. Trailer tires are always to be inflated before a trip to the their max psi. Overfilling or underinflation will lead to premature wear or failure. I was able to confirm…

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Answer 4

There is a diameter difference of approximately 1 inch between our 5.30-12 trailer tires and 4.80-12 trailer tires. Our 5.30-12 tire have an outer diameter of 21.9 inches. Our load range C 4.80-12 trailer tire has an outer diameter of 20.7 inches…

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Answer 5

Great question! This is something that has been slowly shifting in the past couple of years (since about 2020). It used to be a hard "no" when it came to changing the amount of pressure to put in the tires and even as of now (January 2023)…

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Answer 6

The best trailer tire to replace your 4.80x12C would be the Kenda Karrier part #AM10130 which has a higher weight capacity, is a radial, and has the higher speed rating of 81 mph instead of the usual speed rating for this size of 65 mph. The higher…

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Answer 7

Yes, in the event you need to use the spare you can mix the construction types (bias and radial). But you will want to get them matched up again sooner rather than later or the trailer will not track properly and you will end up with uneven wear. But…

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Answer 8

The Kenda Karrier S-Trail ST145/R12 #AM10130 that you referenced is slightly smaller in diameter and slightly wider than your original 5.30-12 tire size, so the 145/80-12 tires will take up nearly the same amount of space and work well on your…

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Answer 9

Yes. A 4.80-12 tire and a 5.30-12 tire will both use a 12x4 inch wheel. For your tires, I recommend the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range D #AM10130. This is the only radial tire we carry in this size and it has a rated…

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Answer 10

Bias ply and radial tires are good at doing different things. Bias ply tires have a sturdier sidewall and are thus better for off-road and agricultural applications but still work just fine on pavement. Radial tires track better and run cooler than…

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Answer 11

Trailer tire selection needs to take into account the required tire weight load range for the loaded trailer's weight and also your driving speed. Both the weight load on the tire and your driving speed affect the tire's operating…

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Answer 12

The difference between the two trailer sizes you referenced is that the 5.30-12 will be about 1-1/2 inches taller than the 4.80-12 and would have more capacity. As long as your trailer has the clearance for a slightly taller and wider tire a 5.30-12…

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Can Trailer Tire Size 5.30-12 be Replaced with 145/80-12

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