Speed Rating of Load Star 5.30-12 Load Range C Tires

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Question:

Hi, I would like to know if I am driving at 70 to 75 miles an hour will I be ok when trailering my motorcycle that weight 750+ pounds on a trailer tires max weight is 1,045 tires Load star 530-12 high speed load range C Pleas advise. Thank you

asked by: Orlando

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Expert Reply:

The Kenda K353 Bias Trailer Tire - 5.30-12 - Load Range C # AM10066 has a speed rating of 65 mph and like you mentioned a max load capacity of 1,045 lbs at 80 psi. However you should make sure that the combined maximum load rating is higher than the weight of your loaded trailer. With that being said, I can not recommend that you drive 70-75 mph and go over the speed rating of the tire. Excessive weight and speed can cause premature wear, heat build up, and potential tire blow outs.

For a tire that's the same size and has a higher speed rating I recommend Taskmaster 5.30R12 Radial Trailer Tire # TT53012C. It's still a load range C and has a Maximum load limit of 1,050 lbs at 80 psi. It's also has a M speed rating, so it's rated up to 81 mph. The Taskmaster are radial tires compared to the Bias Ply Kenda tires above. The radial tires have less heat build up because of how they are constructed and typically ride smoother on the highway. Bias ply tires are typically used in off road or agricultural applications.

I linked the parts above, attached a few review videos and an article with a ton of useful information about trailer tires.

expert reply by: Robert C

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Answer 1

I highly recommend the Taskmaster 5.30R12 Radial Trailer Tire #TT53012C for your trailer. This is an excellent, radial ply trailer tire that features a maximum load of 1,050 pounds at 80 psi along with a maximum speed of 81 mph. You will just need…

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Answer 2

To verify if you will be able to switch to the Karrier ST175/80R13 Radial Trailer Tire with 13" Galvanized Wheel #AM31994 on your Harbor Freight Super Duty folding trailer you are going to need to take some measurements. This tire is…

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Answer 3

From my research on the Harbor Freight 4x8 folding trailer uses 4.80-12 tires on a 12 inch wheel for the 1195 lb capacity trailer and a 5.30-12 for the 1720 lbs capacity trailer. It is a good idea to check your existing tires to see which size they…

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Answer 4

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 5

The 12 inch tires that we carry are rated for 65 miles per hour. Any faster than that for extended periods and the excessive heat build up will cause tire failure. To get a tire with a higher speed rating you would have to go up in size. That also…

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Answer 6

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 7

You are correct, the 5.30x12 is the SAE nomenclature, while the 145/80-12 is the closest metric equivalent. The two are approximately the same size with the 5.3x12 being about a tenth of an inch narrower and a quarter of an inch taller than the…

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Answer 8

After you've packed the bearings and assembled everything, carefully slide the hub assembly onto the spindle and install the outer bearing. Install the spindle and tang washer and run the spindle nut down finger tight, then rotate the hub back…

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Answer 9

That's a good question, and the answer is that your current 5.30-12 tires are not safe for traveling at highway speeds. What you likely have on your trailer now is a bias ply tire, which is not good for highway use because they are stiffer and…

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Answer 10

It sounds like you have a pretty nice trip planned! Bias trailer tires do not have a set range you can travel as they meet DOT standards for a tire. With that said before you start your trip I would make sure to check your tires for any dry rot or…

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Answer 11

The nut on the spindle should be tightened until snug, with no side-to-side play in the hub and then backed off slightly, about maybe a 1/8 of a turn. If the spindle uses a castle nut and cotter pin or tang nut, tighten the nut finger tight until it…

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Answer 12

The Kenda 4.80-12 Bias Trailer Tire with 12" Galvanized Wheel - 5 on 4-1/2 - Load Range B #AM30590 have a max speed of 65 mph. When trailer tires are not speed rated with a letter, the default is 65 mph max. I've attached an article to…

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Speed Rating of Load Star 5.30-12 Load Range C Tires

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