12-Inch Trailer Tire with Speed Rating Higher Than 65-MPH

Question

Question:

Hi, I want to purchase a 12inch radial tire 4 bolt 4 but I cant seem to find any above 65mph rating. Im also trying to determine the speed rating of my existing tires in order to verify a good match. Where is the speed information listed on the tires?

asked by: Dan P

0

Expert Reply:

You'll find important information about your trailer tires right on the tire sidewall. This information includes the tire size, of course, as well as the Load Range letter code for weight capacity, the Speed Rating letter code and the inflation pressure.

For a radial tire only with a speed rating higher than 65-mph you might consider the Taskmaster 4.80R12 Radial Trailer Tire # TT48012C which fits 12 x 4-inch wheels and which has a speed code M, which means it is good to 81-mph. This tire has a Load Range C rating, good to 990-lbs when properly inflated to its maximum pressure of 90-psi. This is our only 12-inch radial trailer tire with this high a speed rating. You'll simply choose a mating 4-bolt wheel and have the tire mounted locally.

We have three Kenda ST145/80-12 radial tires pre-mounted to a 4-bolt aluminum wheel and all appear on the linked page. These are all Load Range D tires capable of handling up to 1220-lbs apiece. All are rated for 65-mph maximum speed. If we do not expressly indicate a speed rating in the specs this means the tire's rating is 65-mph.

Please note that 12-inch tire sizes 4.80-12 and 145/80-12 are NOT the same overall diameter; the 4.80-12 is 20.5-inches overall diameter when inflated and the 145/80-12 is 21.3-inches overall. If you wish to tell me your specific tire size and the GVWR of your trailer I will be happy to offer recommendations.

expert reply by: Adam R

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Answer 1

I recommend the Taskmaster 5.30R12 Radial Trailer Tire #TT53012C. It's radial construction is best suited for highway travel. The Dexstar Steel Spoke Trailer Wheel #AM20132 can also be purchased with a 3rd tire to give you a spare wheel and tire…

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Answer 2

I have two tires that fit your needs. The Taskmaster #TTWSF48012C is a 6-ply Bias Ply tire rated for up to 990 pounds per tire (Load range C) and speed rated (M) up to 81 mph. The Taskmaster #TT48012C is a radial trailer tire also load range C and…

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Answer 3

The speed rating is listed at 70 mph for the Malone MegaSport 2 Tier Trailer for Heavy Boats - 2 Storage Containers - 14' Long - 1000 lbs #MPG550-TH. This is rated for 70 mph max due to the tires. Traveling faster is not recommended as the tires…

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Answer 4

Changing a trailer's tire size does not necessarily equal an upgrade. The most useful way to add safety margin to a trailer is to change the Load Range rating of the existing tire size. I will explain why. Heat is a trailer tire's worst…

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Answer 5

All of the 4.80-12 trailer tires are going to be bias ply tires but I have good news for you. A 145/80-12 trailer tire will fit the same size wheel width as the 4.80-12. But the 145 will be approximately 0.8 inches wider and 0.8 inches taller than…

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Answer 6

The experiences we've had with Harbor Freight trailers is that they use standard 5 bolt patterns common on other trailers. The most common being 5 on 4-1/2 inches like what the part #AKIHUB-545-2-1K which fits the common 2,000 lb axle spindle.

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Answer 7

I would be happy to help! I recommend the Kenda 4.80-12 Bias Trailer Tire with 12" White Wheel - 4 on 4 - Load Range C #AM30620 which has the exact 4.80-12 tire you need, and also a wheel with the 4 on 4" bolt pattern to match the hub on…

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Answer 8

The Kenda trailer tire part #AM10130 that you referenced can fit all standard 12-inch trailer wheel sizes so it would work well on the 12-inch wheel you have on your Harbor Freight trailer.

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Answer 9

I cannot recommend going above the 65 mph limit of the load range B Kenda 4.80-12 Bias Trailer Tire with 12" Galvanized Wheel - 4 on 4" Bolt Pattern #AM30550 or 5 on 4-1/2" Bolt Pattern #AM30590. Having said that, going to a…

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Answer 10

You do indeed have a 12 inch rim. When you measure the diameter of the wheel, you'll need to measure the diameter of he wheel where the tire bead meets the wheel. I've provided you a cutaway diagram of a wheel showing where the measurement…

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Answer 11

The closest radial tire size we offer to your 4.80-12 bias ply trailer tire would be the Karrier S-Trail ST145/R12 Radial Trailer Tire #AM10140. This tire will be about an inch taller and wider than what you currently have. You will need to make sure…

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Answer 12

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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