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Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel - 4 on 4 - Load Range C

Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel - 4 on 4 - Load Range C

Item # AM3S120
Our Price: $123.03
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Trailer Tires and Wheels
Shipping Weight: 29 lbs
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Trailer Tires and Wheels AM3S120 - Bias Ply Tire - Kenda
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Bias tire has a ply rating of 6 and a 1,360-lb maximum load at 50 psi. The 13" diameter x 4-1/2" wide steel trailer wheel features a 4 on 4 bolt pattern and a corrosion-resistant powder coat finish. Great Prices for the best trailer tires and wheels from Kenda. Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel - 4 on 4 - Load Range C part number AM3S120 can be ordered online at or call 1-800-940-8924 for expert service.
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Kenda Trailer Tires and Wheels - AM3S120

  • Tire with Wheel
  • 13 Inch
  • 4 on 4 Inch
  • 175/80-13
  • Load Range C
  • Steel Wheels - Powder Coat
  • Bias Ply Tire
  • M - 81 mph
  • Kenda

Bias tire has a ply rating of 6 and a 1,360-lb maximum load at 50 psi. The 13" diameter x 4-1/2" wide steel trailer wheel features a 4 on 4 bolt pattern and a corrosion-resistant powder coat finish.


  • Loadstar special trailer tire outshines other bias tires
    • Flatter tread offers improved stability for excellent handling
    • Special trailer tire design
      • Couples the strength of a bias tire with the durability and stability of a radial tire
      • Created specifically for trailers and not intended for use on other vehicles
    • Advanced rubber compound
      • Longer tread wear
      • Low rolling resistance for smooth ride
  • Steel wheel has 8-spoke design by Dexstar
    • Resists rust with e-coat and white powder coat finishes
  • Tire-and-wheel assembly meets Department of Transportation specifications


  • Rim dimensions: 13" diameter x 4-1/2" wide
  • Bolt pattern: 4 on 4"
  • Wheel capacity: 1,360 lbs
  • Wheel bolt size: 1/2"-20
  • Pilot diameter: 2.65"
  • Offset: 0
  • Tire size: ST175/80D13
    • Section width: 6.6"
    • Outer diameter: 24"
  • Tire capacity:
    • Load range: C
    • Ply rating: 6
    • Maximum load: 1,360 lbs at 50 psi
  • Maximum speed: 81 mph (speed rating M)
  • Warranty:
    • 5-Year on tire
    • Limited 1-year on wheel

1-Year Worry-Free Guarantee

This tire has a 1-year worry-free guarantee. If within the first 12 months the tire is damaged in any way, it will be replaced at no charge.

Bias Tires vs. Radial Tires

Bias vs. radial tire graphic

Bias ply tires are designed for off-road or agricultural applications. They are built with thick, durable nylon cords that are positioned at a 30- to 45-degree angle to the direction of travel. The layers alternate in a crisscross pattern, making the sidewalls stiffer so that the entire tire is able to flex easily. As a result, the tire provides a smooth ride and improved handling when trailering on uneven surfaces.

Determining the Bolt Pattern

The first number in the bolt pattern is the number of bolt holes. The second number denotes the diameter, in inches, of the circle on which the bolt holes sit.

Bolt Pattern - Odd

To determine the bolt-circle diameter on wheels with an odd number of bolt holes, measure from the center of any bolt hole to the point halfway between the two bolt holes directly across from the first. (Example: "5 on 4-1/2" means 5 bolt holes with 4-1/2" measured to a point halfway between the opposite bolt holes.)

Bolt Pattern - Even

On wheels with an even number of bolt holes, measure from the center of one bolt hole to the center of the hole directly across from it. (Example: "8 on 6-1/2" means 8 bolt holes with 6-1/2" from the center of one hole to the center of another on the opposite side.)

Bolt Pattern - Side

Measuring the distance from the center of one bolt hole on the wheel to the center of a bolt hole right next to it can also help to determine the bolt pattern.

  • If D = 2-5/8", then the bolt pattern is 5 on 4-1/2"
  • If D = 2-3/4", then the bolt pattern is 5 on 4-3/4"
  • If D = 3", then the bolt pattern is 5 on 5"
  • If D = 3-1/4", then the bolt pattern is 5 on 5-1/2"

3S120 Dexstar 8-Spoke 13" White Wheel and Loadstar K550 Bias Tire - LR C

Replaces Americana 3S120DX

Customer Satisfaction Score:

Customer Reviews

Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel - 4 on 4 - Load Range C - AM3S120

Average Customer Rating:  4.9 out of 5 stars   (9695 Customer Reviews)

Bias tire has a ply rating of 6 and a 1,360-lb maximum load at 50 psi. The 13" diameter x 4-1/2" wide steel trailer wheel features a 4 on 4 bolt pattern and a corrosion-resistant powder coat finish.


Nice looking tires and wheels.


Mike was super helpful about guiding me the correct tire/wheel size a making sure I had the correct hub size to match.


They are on my trailer but have not used it yet looking forward though


They processed and shipped the order lightening fast and on a Sunday evening! Check them out if you have any trailer or camper needs.


I ordered these for my 1997 Jayco 1207 KB popup camper. I ordered item K71-723-01 to provide extra clearance for the tires. Everything shipped quickly! I ordered three of these tires and wheels. They are all great and fit perfectly.


Fit and finish were excellent. I couldn't find this ture and wheel size with this bolt pattern anywhere else. Shipping was one day faster that predicted and the item arrived boxed and in perfect condition.


Nice tires


These wheels and tires still look new after a year. The trailer does not get moved often, but just the same, I am confident all will be well when I do move it.


A great business to order parts from. Melissa T is fantastic as well


Order arrived on time and was exactly what I wanted.


Incredibly good product and price. Excellent service.


Went up from 12" to 13" wheels and decided on these because of their speed rating (M 81 mph). Perfect fit onto existing hubs. 2500 miles from Florida to Nova Scotia, Canada at mostly 65 mph. No problems. Tires did not get excessively hot, could always touch with full palm.
Fast delivery from e-trailer.


Always fast service , products are good


I'm very thankful that I found etrailer. Great prices very good product. Very good product information.
Please keep the good work.


Good website, very good product and price, extraordinary service.


Excellent customer service, very fast shipping, would highly recommend your company to anyone needing your products.
Rim and tire will installed on towable cement mixer.


Fast delivery good product


Fast shipping! Just what I needed for a 40 year old trailer.


The tire and rim not only look great but make the refurbished trailer look closer to being new. The service from etrailer was prefect. No problems. The delivery was even earlier than expected. All the products we have purchased have been exceptional.



They have great tires for our small trailer. So good have not gives them a second thought.


I bought this for a spare for my trailer, I haven’t used it yet and I hope that I never will. The pilot diameter hole is 1/8” bigger than I wanted, but it was the closest one that I could find. Thank you for waiting one year before asking me for a review, this makes much more sense. For above reasons, I can’t give you an excellent rating, but for the price, I think it’s great!


Seem great so far! Bought them for a camper I built. Was planning on going from Indiana to Yellowstone last summer with them. But then COVID hit and National Parks closed. We have done some more local trips of 25-100 miles and worked great so far.


Doing a DIY lift on my ancient Jayco pop up trailer to accommodate larger tires with a higher speed rating. Tires arrived very well packed and in perfect condition, very happy with them!



Its a year later and these tires are still going strong. Multiple camping trips with the now lifted popup under our belt and these tires have made pulling the trailer at highway speeds a breeze. The larger diameter combined with the axle lift also means getting the trailer into the back country is easier. Highly recommend these tires if youre doing a lift on your popup!


I was very pleased with the tire ordering process, it was easy to understand. The tires were shipped and received in a timely manner. My only concern is with the age of the tires. The tires were mfg. 51 of 17 since it is now 5 of 19 the tires are already 17 months old. Your website recommends a life expectancy of trailer tires to be 7 years that would be 84 months. So the tires I got have already gone through 20% of their life expectancy. My reference number is107755102

Etrailer Expert

Mike L.


Its not unheard of for tires to arrive at our location that were manufactured a year or more before we received them. These tires are manufactured overseas. After they are manufactured, they can sit in a warehouse for months until theyre packed in a shipping container and ultimately loaded on a container ship and shipped to the US. The trip here and entry through US Customs can take a month or even more. The tires then sit in a warehouse in the US until we order and receive them. Tires that are stored in a warehouse under controlled conditions dont age or dry rot like tires that are exposed to the elements and UV radiation do. The fact that your tires were older than a year when you received them will not have any effect on their lifespan or durability. They should be good for up to 6-7 years, assuming theyre not stored in direct sunlight, not overloaded, kept properly inflated and their speed rating isnt being exceeded. The product warranty begins at the date of purchase, not the date of manufacture.


These tires are fantastic after 1 year and 2600 miles the tires still look brand new. I believe that these tires will last another year and 2600 more miles. For the last 15 years I have been getting around 1200 miles out of a set of tires, I love to fish so my trailer goes everywhere. yes I will buy these again.



the tires still look new and have 4100 miles on them fantastic


Put LoadStar tires and wheels on my 32 foot sailplane trailer last year. Currently have about 1600 miles of combined highway and off-road on them with no problems. So far they have held up better than other tires I have tried in the past., Stable trailer handling. negligible air loss, and no sidewall checking in desert conditions. I'm happy

Show More Reviews

See what our Experts say about this Kenda Trailer Tires and Wheels

  • Availability of Wheel and Tire to Replace B78-13 that Has 4 Bolt Mounting Pattern
    B78-13 is an old tire size designation that isn't used much anymore. The modern trailer tire equivalent size is ST175/80-13. For that tire size mounted on a 4 bolt wheel you would want the part # AM3S120.
    view full answer...
  • Is Loadstar 175/80-13 Bias Tire & Wheel With 4 on 4 Bolt Pattern OK For Highway Speed
    Yes, the Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel - 4 on 4 # AM3S120 has an 81 mph speed rating and will work well for highway use. In regards to the bearings, you'll need to inspect them and if they are in good condtion they do not need to be replaced.
    view full answer...
  • Can you Replace 15 Inch Trailer Wheels and Tires With Smaller 13 Inch Wheels and Tires?
    There are still a couple issues to consider when moving from a 15" wheel to a 13" wheel on your trailer. First you will need to ensure the smaller wheels will fit on your hub. If you know what hub you have you can verify it is rated for your size wheels. Otherwise you will need to measure the pilot hole size for the hub and if it is a braking hub you will need to measure to ensure the diameter of the brake drum will fit inside the smaller wheel. Also you will need to verify your trailer...
    view full answer...
  • Why Are Wheel Pilot Hole Measurements Taken in Decimals and Not Fractions.
    The wheel pilot hole will only matter if A) the wheel centers on the hub and uses wheel bolts, nut lug nuts, to secure to the hub or B) if the hole is too small on a hub that uses lug nuts. If your wheels secure to the hub using lug nuts then the pilot hole can be larger than the part of the hub it fits on. Why we use decimals and not fractions is because when a wheel does install with wheel bolts, the pilot hole has to be exact. Fractions are not accurate enough and someone can easily...
    view full answer...
  • Wheel Bolts and Lug Centric Wheel Installation
    If the Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel # AM3S120 is most commonly centered on the hub using the lug studs and lug nuts then there is no issue with the pilot hole diameter as long as it fits over the hub. The wheel will fit the hub and won't wander because it is held firmly in place at the 4 hole locations. It is very similar for the wheel bolts you referenced. The wheel bolts when started and tightened evenly will also allow you center the wheel using the...
    view full answer...
  • How to Determine if a Trailer has a 13 inch Rim with a 4 on 4 inch Bolt Pattern
    It sounds like you have a bolt pattern of 4 on 4 inch, but the dimension you listed is slightly off from what this bolt pattern is. What you will want to do is measure from one hole center straight across to the hole center opposite of it. If this dimension is right at 4 inches then you do have a 4 on 4 inch bolt pattern and all of the rims at the attached link will fit.
    view full answer...
  • 13 inch Rim with 4 on 4 in Bolt Pattern and ST175/80D13 Tire Recommendation
    We don't carry the specific brand rim and tire you are looking for. The closest we have would be the Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel # AM3S120 that you referenced which is a 13 inch wheel with a 4 on 4 inch bolt pattern and has a 175/80D13 trailer tire installed on it. Most likely this rim and tire would work for you, but if you need the specific brand you requested we can't help you unfortunately.
    view full answer...
  • Largest Wheel/Tire For a Trailer Hub with 4 on 4 Inch Bolt Pattern
    The largest tire/wheel combo you can use on a trailer hub with 4 on 4" bolt pattern is a 175/80-13 like the Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel part # AM3S120 you were looking at. The reason for this is because the hub face on a trailer hub with 4 on 4" bolt pattern is not large enough to properly support a wheel larger than 13" diameter. I have attached a list of our wheel/tire sizes for this size below.
    view full answer...
  • Tire and Wheel Recommendation for a 1973 Boat Trailer with 13 Inch Wheels and 4 Hole Bolt Pattern
    We do carry 13 inch wheels with a 4 hole bolt pattern, but there are a few other factors that we will need to look at to make sure we can get you a wheel that will work with your trailer. First, we carry two different 4 hole bolt patterns for a 13 inch wheel. The bolt patterns are 4 on 4 inches and 4 on 9.44. You will want to measure from the center of one bolt hole to the center of the bolt hole directly opposite of that hole to find what bolt pattern your wheels have. I have attached...
    view full answer...
  • Recommended Tire Size To Replace 165R13 Tires Currently On Trailer
    The closest replacement tire to your older 165R13 tires is going to be the Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel - 4 on 4 - Load Range C # AM3S120 you were looking at. This tire will be slightly larger at 5/8" taller and 5/16" wider, but this is close enough that you should have no fitment issues. In addition to the tires being what you need, this 4 lug bolt pattern should also match but you will want to measure the bolt pattern of your current wheels just to be...
    view full answer...
  • Is Going to a Bigger Trailer Tire Than Stock Recommended
    If you arent overloading your current wheel/tire combo then I wouldnt necessarily recommend going with a different setup. If you have the clearance for a larger setup then it technically would work, as long as the motives for going to a different setup is not to try and carry more weight than the trailer is rated for. A larger tire might build less heat, but if you are within capacity for the wheels and tires this shouldnt be an issue. Higher rated wheels and tires will not increase the...
    view full answer...
  • Will the Loadstar ST175/80D13 Bias Trailer Tire # AM3S120 Work Well in Grassy/Muddy Areas
    If you haul your trailer off of the road fairly often then Bias trailer tires like the Loadstar ST175/80D13 Bias Trailer Tire # AM3S120 that you referenced are the way to go. We mainly see Bias tires used for agricultural purposes so they should do very well. You will need to compare the 6.6" section width and the 24" outer diameter of this tire as compared to what you currently have to make sure it fits properly. This tie also has a max load capacity of 1,360 lbs at 50 psi so it should...
    view full answer...
  • Replacement Tire And Wheel Combination For Trailer Tires Size 155/80R13 With 4 On 4 Bolt Pattern
    Based on your information, I have a tire and wheel combo that might work for you that is similar to but not the same size as your tires. The Loadstar ST175/80D13 Bias Trailer Tire with 13 inch White Wheel, Item # AM3S120, is designed for great handling even at high speeds. It has an outer diameter when inflated of 24 inches and a width of 6.6 inches. It has a maximum weight capacity of 1,360-lbs at 50 psi and a top speed of 81 mph. Your 155/80R13 tires have an outer diameter of 22.8...
    view full answer...
  • Loadstar ST175/80D13 Bias Trailer Tire # AM3S120 Recommendation to Replace P185/80-13
    Since your current trailer tire size starts with the letter P that means it's a vehicle tire and shouldn't be used on a trailer. You'd want a trailer tire size that starts with ST like the # AM3S120 which is a tire size ST175/80D13. There isn't a larger size with a 4 lug bolt pattern so this would be your best option. It would only be .3 of an inch shorter than what you currently have.
    view full answer...
  • Picking Out Replacement Wheel/Tire and for Haulmaster 66771 Trailer
    The wheel of the Loadstar # AM3S120 that you referenced will fit on the HaulMaster 66771 trailer that you have now. The problem you'd have though is that this is a much taller setup since it's a 13 inch wheel instead of what you have now that is 8 inch. So there could be fender clearance issues. So what I would do is check is check the sidewall of your current tires to get the size you have and then check out the link I attached to this page that has all of the 8 inch wheel and tire options...
    view full answer...
  • Is The Loadstar ST175/80D13 AM3S1230 Sold In A Quantity Of Two?
    The Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel - 4 on 4 - Load Range C # AM3S120 you were looking at is sold as a quantity of one. If you are needing two wheels and tires you will need to order a quantity of two. I included a video of the # AM3S120 for you to take a look at.
    view full answer...
  • How to Pick Out Replacement 14 inch Trailer Rim for Trailer
    First we need to figure out exactly what bolt pattern you trailer has in order to pick out the correct replacement rim. I attached a help article that details how this would be done. The dimensions you listed are pretty close to a few different options we have it is hard to say exactly what you have. Most likely it's 4 on 4 inch, but you would need to verify this. Once you do check out the link I attached that will take you to a page that has all of the 14 inch rims we carry.
    view full answer...
  • Identifying Trailer Wheel Bolt Pattern
    There is a 5 on 4-1/2 inch bolt pattern, but I'm not familiar with a 5 on 4-1/4. If the center to center distance between two adjacent holes is 2-5/8 inches, you have a 5 on 4-1/2. If you click the provided link, you can see an FAQ article that describes how to determine your wheel bolt pattern.
    view full answer...
  • Aloha Trailer Tire Replacement for Size P185/80R13
    The Loadstar Wheel and Tire part # AM3S120 that you referenced is a great solution for your trailer that has a passenger vehicle tire size of 185/70R13. The sizes are very similar and the bolt pattern is the same. Passenger vehicle tires should also never be used on trailers. The sidewall isn't reinforced the same as what a trailer would need. I attached a review video for more info for you to check out as well.
    view full answer...
  • Backspacing of Trailer Wheel and Tire part # AM3S120
    The backspacing of the trailer wheel part # AM3S120 that you referenced is 2-3/4 inches. This is calculated by taking the width of the rim (4.5 inches) adding an inch for the lips and then dividing by two since this is a zero offset rim.
    view full answer...
  • Spare Tire and Rim Needed for 1998 Jayco Eagle 30 FT Travel Trailer with ST205/75R15 Tires
    The first thing that you will want to do is to determine your bolt pattern. We know that there are 5 lugs but we will also need to know the diameter of the circle the lugs sit on. I have included an article which covers this. It is always recommended that your tires should match, meaning the same size, load range, and construction of tire on a trailer. If you use tires that don't match, you could experience problems of overloading and overheating, which can lead to tire failure but since...
    view full answer...
  • Availability of 13 inch Wheel for Trailer that has 4 on 4 inch Bolt Pattern
    Sounds like you have a 13 inch wheel with a 4 on 4 inch bolt pattern. You can verify this by checking out the help article I attached that details how to determine bolt pattern. The part # AM3S120 is a 13 inch wheel that has a 4 on 4 bolt pattern that has a tire size of ST175/80D13 on it as well. I attached an review video for you to check out too.
    view full answer...
  • Replacement Tire and Wheel Recommendation for 35 Year Old Trailer With ST175/80D13 Tires
    Even though your trailer is 35 years old, tire sizing has not changed. The Kenda ST175/80D13 Bias Trailer Tire # AM3S120 is the correct tire for your trailer. The 13 inch measurement comes from the diameter distance on the inside of the tire. The outside of the rim will measure approximately 14 inches because the tire fits inside of the rim/wheel. I went out to our warehouse and measured the # AM3S120 that you referenced and the outside diameter is 14 inches, however it fits a 13 inch...
    view full answer...
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  • Will Going to a Higher Capacity Trailer Tire Increase the Weight Capacity of the Trailer
    No, adding a higher capacity trailer tire does not increase the capacity of the trailer UNLESS the tires you have are rated lower than the axle capacity. A trailers weight capacity is set by the axle so that is what you will be limited to. If you check the trailer tongue or frame, somewhere there should be a plate or sticker that lists the axle capacity. If you cannot find this information then it may be on the axle itself. If you still cannot find it there then you will need to pull off...
    view full answer...

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