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  • What is the Difference Between Load Range C and D ST175/80D13 Trailer Tires
  • 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 # AM1ST77, the capacity is 1,610 pounds at 65 psi. For a C load range in the same size, like # AM1ST76 , the capacity is 1,360 pounds at 50 psi. Adding the D load range tires of the same size will fit your trailer, but they will not allow...
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  • Recommended Replacement Trailer Tires for a 5th Wheel Trailer with 235/85-16 Tires
  • I recommend using an ST (special trailer) tire, like # AM10501. This is a load range F tire with a capacity of 3,960 pounds at 95 psi for a total capacity for 4 of 15,840 pounds. Another option that is a little less expensive is a load range E tire, # AM10295 that you referenced rated for 3,640 pounds at 95 psi. Four of these tires on a tandem axle trailer will provide a total capacity of 14,560 pounds. These are radial tires which will give you the best ride and longest life. Special...
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  • What is the Difference Between Load Range B and C Trailer Tires of the Same Size
  • Trailer tires that are the same size but with different load ratings will have different capacities. A load range C tire will have a higher capacity than a load range B tire of the same size. The Kenda 4.80-12 Bias Trailer Tire with 12 Inch White Wheel, # AM30660, that you have referenced has a capacity of 990 pounds at 90 psi and it is a load range C. The Kenda 4.80-12 Bias Trailer Tire with 12 Inch White Wheel, # AM30580, has a capacity of 785 pounds at 60 psi and is a load range B.
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  • ST205/75r14 Trailer Tire Vs. a ST205/75D14
  • Long story short, yes you can. But going with the ST205/75R14 would be a better replacement than a ST205/75D14 because the R in the first size means it is a radial tire whereas the D in the second size means it is a bias ply. The main difference between a radial ply and a bias ply tire is how the tire is constructed. The cords inside a bias ply tire run at a 32 degree angle to the direction of travel, and the cords on a radial tire run at a 90 degree angle to the direction of travel,...
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  • Factors to Consider When Adding Larger Tires and Wheels to a Trailer
  • You can add larger wheels and tires to a trailer as long as you have enough room for the larger size. The main clearance issues we find when putting larger tires and wheels on a trailer is from the top of the tire to the fender and from the inside wall of the tire to the trailer wall/frame. The next factor that you will want to consider is the bolt pattern of the wheel. If your current wheels have a 4 on 4 inch bolt pattern, then the new wheels must have a 4 on 4 inch bolt pattern as...
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  • What is Correct Tire Pressure for a 4.80-12 Size Americana Trailer Tire on a Viking Pop Up Camper
  • The amount of tire pressure you need in your 4.80-12 Americana tires depends on the load range of the tire. If it is a load range B, it will need to be at 65 psi like # AM10060. If it is a load range C, it will need to be at 90 psi like # AM10062. The trailer tire should state what load range it is on the side wall. Trailer tires should be inflated to their max psi rating listed on the tire sidewall for best performance and longevity. I have linked an article on trailer tire...
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  • Recommendation for the Best Trailer Wheel and Tire Size for Highway Towing
  • You are correct that many deck over trailers have lower height wheels and tires. The reason for this is to reduce the height of the deck for ease of loading and unloading and to reduce the propensity for the trailer to be top heavy which can be a factor that contributes to trailer sway. Trailer tires are not rated for high speed towing. As a general rule most trailer trailer tires and wheels are rated for 65 miles per hour depending on the manufacturer. The best way to select the...
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  • Recommended Load Range D Radial 14 Inch Tire For Trailer
  • We do offer a 205/75-14 trailer tires and 215/75-14 tires that will work well for you. For a 215/75-14 tire I recommend the Taskmaster ST215/75R14 Radial Trailer Tire, part # TTWTRTM2157514D. This Load Range D tire has an 8 ply rating and has a maximum load capacity of 2,200 lbs at 65 psi. The 205/75-14 tire I recommend is the Karrier Radial Trailer Tire, part # AM10235. This is a load Range D tire with a load capacity of 2,040 lbs at 65 psi. This tire will fit rims that measure...
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  • What Size Trailer Tires Will Replace B78-13 Trailer Tires
  • A trailer tire size 175/80-13 will replace either an A78-13 or B78-13 trailer tire. A 175/80-13 is going to have 3 load ratings: B at 1,100 pounds at 35 psi, C at 1,360 pounds at 50 psi, and D at 1,610 pounds at 65 psi. This size will have a diameter of 24.1 inches. This tire size will fit on a 4-1/2, 5, or 5-1/2 inch wide wheel. If you choose tires rated higher than your axle, you still have to go by the axle weight capacity. If you choose tires rated lower than the axle capacity,...
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  • What is the Difference Between ST175/80D13 Tires and ST175/80R13 Trailer Tires
  • The D in 175/80D-13 indicates that it is a bias ply tire where as the R in 175/80r-13 indicates that it is a radial tire. The difference is how the steel belts inside are oriented. Bias ply tires are generally better in off road types of situations. Radial tires track better and run cooler. You do not want to mix the different construction types because that can lead to uneven wear and decreased ride quality. Each type of tire will have a load range such as # AM10210 which is a radial...
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  • Comparing Radial Trailer Tires and Bias Ply Trailer Tires
  • We actually have an FAQ article on trailer tires, part of which covers bias ply tires versus radial tires. I have posted the section below and I have also included a link to the whole FAQ article for you. The main difference between a radial ply and bias ply tire is how the tire is constructed. The cords underneath the tire are run in different directions. On a bias tire, the cords run at a 32 degree angle from the direction of travel and on a radial tire, the cords will run at 90 degrees...
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  • What is the Difference Between Load Range E and F Trailer Tires in the Same Size
  • The difference between a load range E and load range F tire of the same size, 235/85-16, is the weight capacity and pressure. The Karrier Radial Tire, Load Range E, # AM10295, has a capacity of 3,640 pounds at 95 psi. The Load Range F Tire, # AM10501, has a capacity of 3,960 pounds at 95 psi. Trailer tires should always be inflated to the maximum psi rating indicated on the tire. If a tire is under inflated, it will cause the side wall to build up more heat faster and cause the tire...
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  • Tire and Wheel Recommendation To Replace 20.5x8x10 Trailer Tires and Wheels
  • For the 20.5x8x10, the new size is a 205/65-10. This would be the better tire for the long drives you plan on because it is a wider tire that will offer more stability. You can also get higher load capacities with the wider tire in this case if needed. I recommend the Loadstar K399 Bias Trailer Tire, # AM1HP56, for just a tire. This tire has a load capacity of 1,650 pounds at 90 psi. It is designed to fit on 10 by 6 inch rims. Trailer tires should be inflated to their maximum psi rating...
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  • What Do The Letters Mean in the ST205/75D15 C Tire Size on My Camping Trailer
  • On a trailer tire labeled ST205/75D15 C, the ST stands for Special Trailer which means it is designed for use on boat and utility trailers. The 205 is the section width of the tire in millimeters. The 75 is the aspect ratio (or section height). It means the section height of the tire is 75% of the 205 mm section width. The D is the designation for the internal construction of the tire. The D stands for diagonal or bias ply construction. That means the tire body plies inside the tire...
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  • Recommendation for 4.80 x 12 Trailer Tire and Wheel Combo for Highway Speeds
  • We have numerous 4.8-12 tire/wheel combos available depending on the bolt pattern you need. For a 4 on 4 bolt pattern, I recommend Kenda 4.80-12 Bias Trailer Tire with 12 inch White Wheel, # AM30620. This is a load range C tire with a 6 ply rating and 990 pound capacity at 90 psi. It comes with a 12 inch white rim. This tire/wheel combo is rated for a maximum speed of 65 miles per hour. For a 5 on 4-1/2 bolt pattern, I recommend Kenda 4.80-12 Bias Trailer Tire with 12 inch White Wheel,...
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  • Trailer Tire Recommendation for a 15 Inch Tire Size 7.00 x 15
  • The only 7.00 x 15 tire we carry is a light truck tire, # AM10414, that you referenced. The closest size to a 7.00x15 tire would be a 225/75-15. These tires can fit on a 6 to 7 inch wide rim. But they are a little taller at 28.1 inches versus 27.88 for a 7.00x15. Make sure to use ST trailer tires. The ST in front of the tire sizes indicates Special Trailer. Trailer tires are designed with a thicker side wall to handle more vertical load. An LT is a light truck tire and light truck tires...
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  • How to Determine the Right Air Pressure to Fill a Trailer Tire
  • 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 curious if the tries on the camper are ST tires or regular passenger vehicle tires. On a regular trailer tire you would inflate it to the max psi indicated on the tire because trailer tires are built with a thicker sidewall to handle more vertical...
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  • What does the D15 Mean in Tire Size ST205/75-D15
  • I think you are confusing the tire size numbers with load range. This size tire is available as a ST205/75-D15 or as a ST205/75-R15. The D indicates that the tire is a diagonal bias ply construction and the R indicates that the tire is a radial tire construction. Beyond the size and type, there are load ranges for tires. Most trailer tires are load range B, C or D. This number indicates how much weight the tire can bear at a certain inflation pressure. The tire and wheel combo you...
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  • Trailer Tire Recommendation in ST235/80R16 Load Range E
  • A lot people use the Goodyear tires. We also hear a lot of problems with them but that usually is a result of under inflation which is a problem for any trailer tire. Carlisle makes a good tire too. And Taskmaster, # TTWTRTM2358016E, which we do carry is a solid performer as well. There are some trailer manufacturers that use Taskmaster as their OEM tires. Taskmaster tire # TTWTRTM2358016E is a 235/80-16 load range E tire rated for 3,520 pounds at 80 psi. It also has an M speed rating...
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  • Trailer Tires are Wearing On the Inside Tread with Low Miles on the Tires
  • You may be experiencing some wear in the suspension components that can cause tire wear and also be a symptom or cause the axle to be misaligned. Inspect your suspension components and if any of the holes where hardware goes is egg-shaped, that indicates wear. To determine if the axle is not properly aligned, pull in straight on a level surface and stop. Measure from the center of the axle on one end to the center of the ball hole on the coupler. Then do the same on the other side. Even...
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  • Which is Better for Highway Use 4.80-12 or 5.30-12 Trailer TIres
  • The 5.30-12 tires, being wider, are going to make more contact with the road. This means that the roll resistance, noise, and heat build up will be higher than a 4.80-12 tire. The wider a tire is the more contact it makes with the road and the more contact with the road the more you are going to feel bumps as you travel. A 4.80-12 tire will be 20.5 inches in diameter whereas a 5.30-12 tire will be 21.9 inches. You would need to make sure that the is more than 3/4 of an inch above the...
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  • Will Tire Size 225/75-15 Replace a Size 7.00-15 Tire
  • Based on my research, 7.00-15 tires typically fit a 15 x 5-1/2 inch wheel. The ST225/75R15 tire size will fit on 15 inch diameter rims that are 6, 6-1/2, or 7 inches wide. They will not fit on rims narrower than 6 inches. I recommend checking the width of your rims to determine if the new tires will fit. Another thing to note when moving to a different tire size is fender and frame clearance. The 225/75-15 tires are going to be slightly shorter and wider than your current tires. A 7.00-15...
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  • How Much Air Pressure Should be In a Trailer Tire
  • Trailer tires should always be inflated to the maximum psi as indicated on the tire regardless of the load on the trailer. The reason for this is because of how trailer tires are constructed. Trailer tires are made with a thicker sidewall than passenger vehicle tires to handle more vertical load. If they are under inflated, the thicker sidewall will then generate excessive heat and cause the tire to fail. Trailer tire # AM1HP52 for example would need to be inflated to 50 psi. I have included...
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  • Difference Between Bias Ply And Radial Ply Trailer Tires And What Does Load Range Mean
  • The main difference between bias ply and radial ply tire is how the tire is constructed. The cords underneath the tire are run in different directions. On a bias tire, the cords run at a 32 degree angle from the direction of travel and on a radial tire, the cords will run at 90 degrees from direction of travel, or across the tire from wheel lip to wheel lip. Because of the construction of a radial tire, the tire has more flex and will allow for more ground contact. That will improve...
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  • Radial vs Bias Trailer Tires and Can the Same Wheels Be Used for Both Types of Tires
  • The same wheels can be used for both bias and radial tires. You do not need different wheels for radial tires. The tire you have now that is labeled ST205/75D14 is a bias tire because the D inside the tire size means diagonal or bias ply construction. A radial trailer tire will be labeled as ST205/75R14. The R inside the tire size meaning radial construction. The trailer specification of ST205/75C14 is meaning you can use a bias or radial with a Load Range C rating. Normally on a...
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  • Tire/Wheel Combo to Replace 18.5 x 8.5-8 Tires on Snowmobile Trailer
  • The 18.5x8.5-8 is actually an old tire size that is not used much anymore. The closest metric size to your existing tire would be 215/60-8, which is what I would recommend. Your wheel most likely has a 5-on 4-1/4 inch bolt pattern (see link below), you will want to make sure that the bolt pattern of your existing wheels matches that of the replacement wheel. We offer a 215/60-8 load range C, 935 lb capacity tire on a white painted rim as part # AM3H200. When inflated to its 50 psi maximum...
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  • Replacement Trailer Tires for 15 Inch Wheels to replace 7.00-15 Tire Size On A 15X5.5 Wheel
  • The Karrier ST205/75R15 Radial Trailer Tire, # AM10244, will fit on a 15x5.5 inch wheel. It has a maximum load rating of 1,820 lbs. at 50 psi and an overall diameter of 27.3 inches. The overall width is 8.1 inches. I would not recommend installing the Karrier ST225/75R15 Radial Trailer Tire, # AM10256, on a rim width of 5.5 inches. The minimum rim width for that size tire is 6 inches. If you try to squeeze that size tire on a narrower wheel than what is recommended, it will cause the...
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  • Recommended Tire Pressure for ST225/75-15 Trailer Tires
  • Trailer tires should be kept inflated to the maximum pressure listed on the tire sidewall, as opposed to passenger vehicle tires that will have a certain acceptable range. If a trailer tire is inflated to a lower air pressure than the recommended maximum, the amount of weight that the tire can carry will be lowered. If a heavier load is put on the trailer tire than what is recommended for that air pressure, the sidewall of the tire could heat up and cause the tire to fail. I'll link...
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  • Causes of Uneven Trailer Tire Wear
  • Do you mean that the inside of the tread (the half closest to the trailer) is wearing unevenly? Or are you speaking of the inside sidewall? Many things can cause uneven tire wear, including a bent axle, an overloaded trailer and worn or broken suspension components. A trailer axle should be slightly arched, with the high spot in the center of the trailer and the spindles on either end being slightly lower. When the trailer is loaded the arch will flatten, placing the trailer tire...
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  • Can an ST205/75-15 Trailer Tire Be Replaced with a 225/75-15 Tire Size
  • A load range D tire in the 205/75-15 size is not available. You would have to go up in size in order to get a load range D tire. Your existing tires have a width of 7.7 to 8.1 inches and a diameter of 27.4 inches. They fit on 15 by 5-1/2 inch wheels. The next closest size with a load range D tire is 225/75-15. These tires range in width from 8.4 inches to 8.9 inches and could have a diameter between 28.1 and 28.4 inches. They fit on 15 inch by 6 inch rims so new rims would be required....
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