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Loadstar ST175/80D13 Bias Trailer Tire with 13" Galvanized Wheel - 5 on 4-1/2 - Load Range D

Loadstar ST175/80D13 Bias Trailer Tire with 13" Galvanized Wheel - 5 on 4-1/2 - Load Range D

Item # AM31242
Our Price: $123.00
Trailer Tires and Wheels
Shipping Weight: 29 lbs
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AM31242 - 13 Inch Kenda Tire with Wheel
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Bias tire has a ply rating of 8 and a 1,610-lb maximum load at 65 psi. The 13" diameter x 4-1/2" wide steel trailer wheel features a 5 on 4-1/2 bolt pattern and a corrosion-resistant galvanized finish. Great Prices for the best trailer tires and wheels from Kenda. Loadstar ST175/80D13 Bias Trailer Tire with 13" Galvanized Wheel - 5 on 4-1/2 - Load Range D part number AM31242 can be ordered online at or call 1-800-940-8924 for expert service.
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Kenda Trailer Tires and Wheels - AM31242

  • Tire with Wheel
  • 13 Inch
  • 5 on 4-1/2 Inch
  • 175/80-13
  • Load Range D
  • Steel Wheels - Galvanized
  • Boat Trailer Wheels
  • Bias Ply Tire
  • M - 81 mph
  • Kenda

Bias tire has a ply rating of 8 and a 1,610-lb maximum load at 65 psi. The 13" diameter x 4-1/2" wide steel trailer wheel features a 5 on 4-1/2 bolt pattern and a corrosion-resistant galvanized 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
    • Galvanized to resist rust
  • Tire-and-wheel assembly meets Department of Transportation specifications


  • Rim dimensions: 13" diameter x 4-1/2" wide
  • Bolt pattern: 5 on 4-1/2"
  • Wheel capacity: 1,660 lbs
  • Wheel bolt size: 1/2"-20
  • Offset: 0
  • Pilot diameter: 3.19"
  • Tire size: ST175/80D13
    • Section width: 6.6"
    • Outer diameter: 24"
  • Tire capacity:
    • Load range: D
    • Ply rating: 8
    • Maximum load: 1,610 lbs at 65 psi
  • Maximum speed: 81 mph (speed rating M)
  • Warranty:
    • 5-Year on tire
    • Limited 2-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"

31242 8-Spoke 13" Galvanized Wheel and Loadstar K550 Bias Tire - LR D

Customer Satisfaction Score:

Customer Reviews

Loadstar ST175/80D13 Bias Trailer Tire with 13" Galvanized Wheel - 5 on 4-1/2 - Load Range D - AM31242

Average Customer Rating:  4.8 out of 5 stars   (5971 Customer Reviews)

Bias tire has a ply rating of 8 and a 1,610-lb maximum load at 65 psi. The 13" diameter x 4-1/2" wide steel trailer wheel features a 5 on 4-1/2 bolt pattern and a corrosion-resistant galvanized finish.


The offset tire mount is very well designed…. Tire and rim are nice…. Fit great on my whaler


My two tire and wheel combos arrived today. The tires seem to be decent (time will tell), but the wheels are atrocious. The slag left by the galvanization process has poured into a 1/4 inch thick blob on the edge of the rim and is flaking off. If you are looking for a decent wheel these are not it and you should look elsewhere.

Etrailer Expert

Katrina D.


Yeah, unfortunately this is a common issue with the galvanized rims. The manufacturer dips the rims then hangs them up to air dry, then they are shipped out. I can send you over to our customer service department to see if we can get some other ones sent out to you.


Ordering was a breeze. Shipped and received in a flash. Etrailer has a new long term customer with me! Great tire/rim combo. They spiced up my little boat pretty good.


Perfect replacement wheels/tires for my 1990 Magic Loader boat trailer. Quick free shipping was a plus. My previous tires were installed in 2008 and just started leaking air. These are supposed to be high quality tires from Tawain (Kenda). We'll see how well they last on my tandem axle trailer with a 4800 lb Wellcraft boat


The trailer tires on rims I ordered came to my house in just a few days. Shipping was included for free and they got here fast. Price was the best I could find so I’m very happy with the entire purchase. I highly recommend trailer.


Loadstar ST175/80D13 Bias with Galvanized 5 hole wheels. It has been hard to find a set of 13" tires to take this load weight, but you had them!

Used on a custom built tilt bed trailer that hauls a 1976 "Morrison Trailblazer", one of only 300 built to make trails in the woods as narrow as 24" wide, or up to 6 feet wide. Morrison Trailblazers were the first mechanized trail building machines made, each built one at a time by Jerry Morrison, each one an improvement over the last one built, this one is # 276, his name is "DINO" and this trailer takes him deep into the woods.



No issues with this set of tires and rims


Tire and lock set were in the same box without any filling and the lock set got destroyed. Notified etrailer and they sent a new lock set which was very nice of them. A little filler in the box would have prevented their loss. I have bought from them a few times over the years without issues and will continue to buy in the future. Thank you etrailer!


Great service and fast delivery. We have been using Load Star tires on our boat trailer for years.


These are load range D tires that I needed for my Tritoon. The rims have a good finish that should not rust for a while. etrailer customer service is the best. I called on Thursday to inquire about my order and was told they didn't know when the shipment would arrive. Since I needed the tires quickly, etrailer substituted another tire in stock and I got them the next day with free shipping. Triple AAA plus for customer service.


I'm very impressed with your shipping system: we got our tires/wheels on time as promised and in excellent condition. The real clincher in ordering from you is the free shipping on larger orders. Now that I know that these new wheels fit my homemade trailer (distance between tire sidewall and trailer is critical), I just ordered your 60 inch axle.


I’ve had several purchases and I’ve always had a great experience with etrailer. Shipping is prompt and their products are of high quality. Just received a new set of load rated wheels and tires for my trailer and looking forward to a safe journey. Thanks etrailer!


I was specifically looking for this size wheel and tire assembly in load range D for a Triton trailer. The price was excellent, delivery was quick and as promised. Very satisfied.


This tire and wheel are a spare for my 6 x 12 utility trailer. I mounted it with a mount also purchased from etrailer and secured it with a wheel lock I also purchased from this website. I have made many purchases from etrailer for my boat, utility, and Airstream trailers and have always been very satisfied with every aspect of all my purchases. This business is a KEEPER! Purchase with confidence.


Fast delivery at a fair price. Great product, and I really appreciated the free shipping.


I would like to comment that the wheels purchased look great. Arrived in 4 days from my order. The quality is excellent along with the price. I have attached a picture where I replaced the standard rims, wheels, and hub caps on my Tracker Boat trailer with the new wheels from etrailer. The center piece from my old hub cap set matched perfect with my new galvanized wheels.


The tires are used on my utility trailer and have been used for several trips and performed great. The tires are rated about 81 MPH but I traveled between 65 and 70 mph and had no performance problems. I strongly recommend this tire.


I purchased this tire for my jet ski trailer. Nice tire. I appreciated receiving delivery updates. It arrived on time and in good condition


Best place to get trailer tires


LOVE e-trailer... Thank you...


They seem like excellent tires. Good rims. Fast delivery.


Great service and wheels and tires were as ordered!


bought this as a spare to match my trailer tires. as usual erailer shipped quickly and followed up to make sure everything was received as expected. my go to vendor.


easy ordering and timely delivery. What more could you ask for


Looks great , got here quickly


Excellent product. Tire holder is first class and galvanized. Tire and wheel are also first class. Only suggestion I have is that all the hardware should also be galvanized because many of us use this in a saltwater environment.

Show More Reviews

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

  • Tire and Wheel Combo with ST175/80-13 Tire and Wheel with 5 on 4-1/2 Bolt Pattern
    We do have numerous tire and wheel combos in size 175/80-13 ready to go. I have included a link to all of the options with a 5 on 4-1/2 bolt pattern and that come with aluminum wheels (we do not have chrome options). The wheel in tire and wheel combo # AM31242 is galvanized steel.
    view full answer...
  • Modern Tire Size Replacement Recommendation for a B78-13
    I spoke with our in-house tire expert. Your best bet would be a 175-80. The wheel and tire combo, part # AM31242 from Americana, will work well. It is a galvanized wheel, so it should hold up better in your marine application, and the ST175/80-D13 tire is the proper replacement size for your B78x13ST
    view full answer...
  • What Tool to Use for Enlarging 1-7/8 inch Trailer Jack Hole to 2 inch
    When we have to enlarge holes here for the install of trailer hitches we usually use a rotabroach tool but the best tool to use is a reamer. Since you're making a relatively small size increase I would find a 2 inch reamer tool for a power drill and go with that.
    view full answer...
  • Is the Part # AM31242 for a Single Tire and Wheel or a Set of 2 Tires and Wheels
    The part # AM31242 that you referenced includes 1 tire that is mounted on 1 wheel. You will need to change the quantity to 2 before ordering if you are wanting a set.
    view full answer...
  • Best Replacement Wheel and Tire Combination for the B78-13ST Tires on my Boat Trailer
    I spoke with our in-house tire expert. Your best bet would be a 175-80. The wheel and tire combo you were looking at, part # AM31242 from Americana, should do just fine. It is a galvanized wheel, so it should hold up better in your marine application, and the ST175/80-D13 tire is the proper replacement size for your B78x13ST. I am including some links to information that will be helpful when picking out a tire and wheel for your setup.
    view full answer...
  • How To Measure The Bolt Pattern On Trailer Wheel While On The Trailer
    You sure can measure to find the correct bolt pattern on your wheels if you can see the lugs. On a 5-bolt pattern, the easiest way is to measure from the center of one bolt hole center to the center of the bolt hole next to it. If that measurement is 2-5/8 inches - the bolt pattern is 5 on 4-1/2. If 2-3/4inches - the bolt pattern is 5 on 4-3/4. If 3 inches - the bolt pattern is 5 on 5, and if it measures 3-1/4 inches - the bolt pattern is 5 on 5-1/2. I have attached a helpful article...
    view full answer...
  • Comparing Bias Ply and Radial Trailer Tires
    Bias ply trailer tires you see more on agricultural and off-road applications but they still work well on pavement. Radial tires track better and run cooler than bias ply tires and are best suited for pavement. A trailer can sway no matter what type of tires are on the trailer. To prevent sway you would use a friction sway control bar, # 83660, or a weight distribution system with sway control. I have included links to our FAQ article on trailer tires and weight distribution and sway...
    view full answer...
  • John Deere Trailer for Snowmobiles Replacement Wheel
    Since the wheel on the Loadstar ST175/80D13 Bias Trailer Tire with 13" Galvanized Wheel # AM31242 is a lug centric wheel, it won't matter that the pilot diameter of the wheel doesn't match with the hub since the lugs will center the wheel. This wheel has the 5 on 4-1/2" bolt pattern and 1/2" studs that will work with the hubs on your trailer.
    view full answer...
  • Maximum Speed and Load Rating for Kenda Loadstar ST175/80D13 Bias Trailer Tire, Part # AM31233
    The Kenda Loadstar ST175/80D13 Load Range D Bias Trailer Tire, part # AM31233, is a pre-mounted trailer tire and wheel combination that uses a 5 on 4-1/2 inch bolt pattern and has a white powder-coat finish. We also offer a version with a galvanized steel wheel, part # AM31242. This tire/wheel is rated for a maximum speed of 65 mph, but local speed limit laws should always be observed. It is rated for a maximum load of 1610 pounds at 65 lbs psi inflation. It is vital that your trailer...
    view full answer...
  • What is Best Replacement 175/D13 Trailer Tire: Loadstar ST175/D13, Part # AM31233, or Carlisle
    All other things being equal, it is always preferable to have matching tires on your trailer. Different tire brands may have different tread depths and may wear at different rates due to variances in the formula used in their rubber compound. However, you can use the two different tires if you wish. As we do not offer the Carlisle tires, I suggest you use a second Kenda Loadstar ST175/80D13, part # AM31233, and keep the Carlisle as your spare.
    view full answer...
  • Replacement Trailer Tire for Size B78-13 of Magic Tilt Trailer
    The B78-13 is the same as the modern tire size 175/80-13 so for a tire in this size I would recommend the Karrier part # AM10210 which is a Load Range D and has a higher speed rating of 81 mph.
    view full answer...
  • What Is the Difference Between Tire With Wheel Combo Item # AM3S334 And Item # AM31242
    The Loadstar ST185/80D13 Tire With Wheel, Item # AM3S334, and the Loadstar ST175/80D13 Tire With Wheel, Item # AM31242, are very similar. Both are galvanized steel wheels with bias trailer tires and have a maximum speed of 81 mph. The Loadstar Item # AM31242 is slightly smaller with a section width of 6.6 inches and an outer diameter of 24 inches. It also has a lower load capacity of 1,610-lbs at 65 psi which is determined by the lowest rated component. Between these two options,...
    view full answer...
  • Recommended Tire Size Upgrade From Current 205/65-10 Tires
    I have a solution for you, but your 205/65-10 tires similar to the # AM3H390 are going to be the largest size we have available in tire that fits on 10" wheels. In order to get larger tires you would need to go up to a 13" wheel. If you've got a 5 on 4-1/2" bolt pattern currently, the Kenda Loadstar ST175/80-13 # AM31242 would be a good choice. These tires are 24" tall as opposed to the 20.5" tires you've currently got and are a Load Range D tire with a capacity of 1610-lbs. These also...
    view full answer...
  • Should I Get Higher Load Range Tires Than Needed
    The higher load range tires, part # AM31242 that you looked at, really won't help or hurt you. They don't protect any better against nails or anything else that can damage them compared to lower rated tires like part # AM3S060 and you certainly don't need the extra capacity. On the other hand the flexing of a tire doesn't have much bearing on the quality of your ride. Sure it'll have some but your suspension should take up most of that. If it were me I'd likely go with the D rated tires...
    view full answer...
  • Replacement Wheel and Tire for Car Hauler with B78-13ST
    The modern equivalent to the B78-13ST is the 175/80-13 like what is on the part # AM31242 that you referenced. You would just need to verify the bolt pattern of your current wheels to know if this would fit. This rim has a 5 on 4-1/2 inch bolt pattern. I attached a help article on determining bolt pattern for you to check out as well. A better option would be the part # ATTWA13RWS though as it has a radial tire which rides and wears better than a bias-ply and it has a speed rating of 81...
    view full answer...
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  • Tire Recommendation to Replace 155R13 on a 1988 Coleman Chesapeake
    The closest trailer tire size to the 155r x 13 that we carry is the 175/80-13 like the part # TTWTRTM1758013C. This would fit your current trailer rims and would work well. You should note that these tires are 24.1 inches tall so you may need to consider that if your current tires are considerable smaller than that.
    view full answer...
  • Can a Mix of Bias Ply and Radial Trailer Tires be Used at the Same Time
    For a short distance, you can use radial and bias tires at the same time, but you would not want to have the mix for long distances or periods of time. The problem is that the 2 different tires track and perform differently and this can affect ride quality and increase wear on the tires. For a bias ply tire, load range D, 175/80-13, use # AM1ST77. For the same tire on a 5 on 4-1/2 inch galvanized 13 inch wheel use # AM31242. I have included a link to our tire FAQ article for you.
    view full answer...
  • Recommend Replacement Spare Tire and Galvanized Wheel For Karavan Trailer Tire ST 175/80D13
    If you have a 5 on 4-1/2 inch bolt pattern you would want a Karrier ST175/80D13 Tire and Wheel part # AM31242, if you have a 4 on 4 inch bolt pattern you would want a Loadstar ST175/80D13 Bias Trailer Tire with 13 inch Galvanized Wheel part # AM3S130.
    view full answer...
  • Speed Rating of Karrier ST175/80R13 Radial Trailer Tire AM10199
    The Karrier ST175/80R13 Radial Trailer Tire part # AM10199 has a 65 mph speed rating. If you need a higher speed rating then you can use the Provider ST175/80R13 Radial Trailer Tire part # TTWTRTM1758013C which is rated for 81 mph. This option also has automotive-grade tread which provides better contact with the road. The Provider is a much better choice than the Karrier in my opinion.
    view full answer...
  • What Size Radial Tires to Replace Existing B78-13ST Load Range B Tires on Boat Trailer
    The B78-13 tire you have corresponds to a ST175/80-13 tire size. Radial tires are an excellent choice. They tend to run cooler than bias-ply tires, which will lead to longer tire life. If you are needing the tire only, we offer that size in a radial load range D (1610 lb capacity @ 65 psi) or a load range C (1360 lbs @ 50 psi). The load D tire is part # AM10210, the load range C tire is part # AM10199. If your present wheels have a 5 lug on 4-1/2 inch bolt circle, we offer a load range...
    view full answer...
  • Can 4.80-12 Trailer Tires and Wheels be Replaced by 175/80-13 Tires and Wheels
    The radial tires at size 175/80-13, are going to be 7 inches wide; too wide to be able to fit without incident on your trailer, so you will need to go with a bias ply tire. The wheels that we carry, unless otherwise noted, have a zero offset. This means that the extra width will be split evenly on each side of the tire. However, there will be very little room if you just have 1-3/4 inches of clearance. Make sure you double and triple check the measurements before ordering. As you are aware,...
    view full answer...
  • Replacement Tire/Wheel Combo Recommendation for 20.5x8x10 Tires on 1991 Coleman Shenandoah
    Your current 20.5x8x10 size tire is equivalent to the current tire size of 205/65-10 which has an overall diameter of 20.5" and a rim width of 6". Since your wheel has a 5-bolt pattern it should be the 5 on 4-1/2" bolt pattern which is the most common. I took a look at the specs for your 1991 Coleman Shenandoah and it looks like this pop-up camper came with a 2,000 lb axle. With that being said, I recommend going with the Kenda S-Trail ST145R12 Radial Trailer Tire with 12" Galvanized Spoke...
    view full answer...
  • Need a 13 Inch Trailer Tire and Wheel, Load Range D, 5 on 4-1/2 Bolt Pattern, With Metal Valve Stem
    The Loadstar Americana Tire and Wheel, # AM3S331, does not come with a metal valve stem. I have found a few tires and wheels, load range D, 13 inch, 5 on 4-1/2 bolt pattern that do have metal valve stems. They use a galvanized wheel to prevent corrosion. Check out Americana Tires and Wheels, # AM3S334 and # AM31242.
    view full answer...
  • What is Speed Rating for Kenda 205/65-10 Bias Trailer Tire and Wheel AM3H410
    The Kenda 205/65-10 Bias Trailer Tire with 10" White Wheel # AM3H410 has a speed rating of 65 mph. This is definitely the most common speed rating for this size trailer tire, but it's not a hard rule that all tires in this size carry the same rating. We don't have anything in this Load Range D or higher that features a higher speed rating, but we do have the Load Range C Kenda 205/65-10 Bias Trailer Tire w/ 10" White Wheel # AM3H370 that has an 81 mph speed limit (speed rating M). This...
    view full answer...

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