Kenda Karrier S-Trail ST145/R12 Radial Tire w/ 12" Aluminum Wheel - 5 on 4-1/2 - Load Range E

Kenda Karrier S-Trail ST145/R12 Radial Tire w/ 12" Aluminum Wheel - 5 on 4-1/2 - Load Range E

Item # AM31215

lowest price pledge

Retail:$148.08

Our Price: $135.67

You Save: $12.41
Tires and Wheels

This item qualifies for Free Shipping

Shipping Weight: 24 lbs

Quantity: 
In Stock, Ships Today
Kenda Tires and Wheels - AM31215
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
Please enter a valid email address.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

pop out icon replay 360 icon
horizontal rotate icon

Product Images

Customer Photos

Videos


  • Tire with Wheel
  • 12 Inch
  • 5 on 4-1/2 Inch
  • 145/80-12
  • Load Range E
  • Aluminum Wheels
  • Boat Trailer Wheels
  • Radial Tire
  • Best Rust Resistance
  • Kenda
Radial tire with automotive-grade tread has a 10-ply rating and a 1,520-lb max load at 80 psi. 12" x 4" Aluminum wheel has a 5 on 4-1/2 bolt pattern and a star spoke pattern. Improved clamp force technology ensures the wheel stays in place. Lowest Prices for the best tires and wheels from Kenda. Kenda Karrier S-Trail ST145/R12 Radial Tire w/ 12" Aluminum Wheel - 5 on 4-1/2 - Load Range E part number AM31215 can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (195)
  • Q & A (50)
  • Videos (1)
  • Photos
  • Why etrailer?

Kenda Tires and Wheels - AM31215

Radial tire with automotive-grade tread has a 10-ply rating and a 1,520-lb max load at 80 psi. 12" x 4" Aluminum wheel has a 5 on 4-1/2 bolt pattern and a star spoke pattern. Improved clamp force technology ensures the wheel stays in place.


Features:

  • Tire-and-wheel assembly is ideal for boat trailers, stock trailers, utility trailers, and campers
  • Aluminum wheel is durable, lightweight, and rustproof
    • Hi-Spec Series 04 star spoke pattern is unique and attractive
    • Front and back of wheel are clear coated
  • Improved clamp force (ICF) technology helps to keep wheel securely in place
    • Bulletproof joint created between wheel and hub when properly installed
    • Eliminate the need for constant retightening of lug nuts
  • Karrier S-Trail radial tire
    • Double steel belts and full nylon plies combine for superior function and long life
    • Premium rubber compound materials help disperse heat
    • Radial ply tire is great for highway use
  • Automotive-grade, computer-generated tread has sipes that channel water away from the tire to improve traction during wet, snowy, or icy conditions
  • Special trailer (ST) tire has sturdy sidewalls so that it can handle heavy loads
    • Created specifically for trailers and not intended for use on other vehicles
  • Assembly meets DOT specifications


Specs:

  • Rim dimensions: 12" diameter x 4" wide
  • Bolt pattern: 5 on 4-1/2"
  • Wheel bolt size: 1/2"-20
  • Wheel capacity: 1,520 lbs
  • Pilot diameter: 3.19"
  • Offset: 0
  • Tire size: ST145/R12
    • Section width: 5.7"
    • Outer diameter: 21.3"
  • Tire capacity:
    • Load range: E
    • Ply rating: 10
    • Maximum load: 1,520 lbs at 80 psi
  • Limited 2-year warranty on tire
  • Lifetime warranty against structural defects on wheel


Karrier S-Trail Radials with Automotive-Grade Tread

Kenda Karrier S-Trail Tread Vs Standard Tread

Unlike standard trailer tire tread, which has solid, continuous ribs, the automotive-grade, computer-generated tread on these Karrier S-Trail radials has ribs with breaks. These breaks allow water to run off to the sides. The Karrier S-Trail tread also has sipes. Siping is a process in which thin grooves (or sipes) are cut into the rubber of the tire. The grooves channel water away from the tread so that the tire makes better contact with the road. Both of these features greatly improve traction during wet, snowy, or icy conditions.


Karrier S-Trail radials are constructed with double steel belts and full nylon plies for increased durability and endurance. The premium rubber compound materials of this tire help disperse heat.


Radial Tires vs. Bias Ply Tires

The cords on this radial ply tire are positioned at a 90-degree angle to the direction of travel so that they lay across the width of the tire from wheel lip to wheel lip. This construction prevents the cords from rubbing against one another when the tire flexes, unlike the cords on a bias ply tire. As a result, radial tires have less rolling resistance, which leads to a longer tread life and improved steering.


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"


31215 Kenda Karrier KR25 S-Trail ST145/R12 Radial Tire with 12" Aluminum HWT Hi-Spec Series 04 Star Spoke Rim - LR E






Video of Kenda Karrier S-Trail ST145/R12 Radial Tire w/ 12" Aluminum Wheel - 5 on 4-1/2 - Load Range E


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Kenda Tires and Wheels - Tire with Wheel - AM31215 Review

Today we'll be reviewing part number AM31215. This is the Kenda ST145R12 radial trailer tire with a 12" aluminum wheel. The special trailer tire design is going to couple the strength of a bias tire with the durability and stability of a radial tire. It is created specifically for trailers, so it's not intended for use on other types of vehicles. It's going to feature the double steel belts and full nylon plys that are going to combine for superior function and long life. It's also going to feature the computer-generated tread design and premium rubber compound materials that are going to offer superior traction in wet or dry conditions. The aluminum wheel is by Americana.

It's going to be very durable and rust-proof, featuring an attractive star spoke pattern. The tire and wheel assembly meets Department of Transportation specifications. Now when it comes to the rim dimensions it's going to give us a diameter of 12", with a width of 4". The bolt pattern's going to be 5 on 4-1/2 so that means that we're going to have 5 bolt holes. The distance measuring from the center of one bolt hole directly across to the area between the two bolt holes on the other side at a straight line measurement is going to measure 4-1/2", so 5 on 4-1/2".

The lug size is 1/2". The pilot diameter is going to measure 3.19". That's measuring the diameter of the larger hole here at the center of the wheel. Now the wheel's going to offer a capacity of 1,520 pounds. The tire size is ST145R12. It's going to give us a section width from edge to edge of 5.7" and an outer diameter of edge to edge right at 21.3".

It's going to feature a load range of E with a 10-ply rating. Maximum load of the tire is 1,520 pounds at 80 psi. It does have a maximum speed rating of 65 miles per hour. It's going to feature all the indicators listed here on the outer wall of the tire. That way you can always use that as a quick reference guide if you ever need any of that information. That's going to do it for today's review of part number AM31215.

This is the Kenda radial trailer tire with a 12" aluminum wheel. .


Customer Reviews

Kenda Karrier S-Trail ST145/R12 Radial Tire w/ 12" Aluminum Wheel - 5 on 4-1/2 - Load Range E - AM31215

Average Customer Rating:  4.9 out of 5 stars   (195 Customer Reviews)

Radial tire with automotive-grade tread has a 10-ply rating and a 1,520-lb max load at 80 psi. 12" x 4" Aluminum wheel has a 5 on 4-1/2 bolt pattern and a star spoke pattern. Improved clamp force technology ensures the wheel stays in place.

- AM31215
by:

I was looking for an alternative to my bias ply 12 inch utility trailer tires. almost upgraded to 13 inch rims when I found these tires recommended by etrailer as an alternative. The tires and wheels arrived in just a couple days and work like a charm. they look awesome also! 451009



- AM31215
by:

The taillight lens was an exact fit. It looks just like the factory one. The tire and wheel are to be used for a spare for my Load Rite tandem jet ski trailer & the tire is exactly the same as what came on the trailer. The Dutton-Lainson trailer spare tire carrier was easy to install and is very secure. etrailer.com had everything I needed and the shipping speed was excellent. I'll definitely be ordering from them again when I need similar products. 218467



- AM31215
by:

Great tire and rims look good too. Use them for mostly short local fishing trips but used them a 1,000 mile round trip to Canada this past summer. Much better and smoother ride than the factory bias ply tires. Looking for something reliable give these a shot. Spend a little extra money you won't be disappointed. Picture is right after installation 356573



- AM31215
by:

Purchase this set to replace my old rusted wheels. I cannot be more happy with the service and the items itself. I had emailed trailer to order the center caps the following day and got everything delivered together at the same time in a quick manner. They look awesome and gave more stability to my trailer. Great set of wheels and tires, thank you etrailer! 221300



- AM31215
by:

Wanted to let you know the tires arrived today. They look great. The only issue is that the holes around the lug nuts are not large enough to allow a 13/16 impact socket to pass through. Standard lug nuts are too shallow. I suggest you suggest to buyers they purchase a set of chrome lug nuts that are long enough to protrude 3/4 inches past the hole so a socket can easily be connected. Attached is a photo of the lug nuts as well as a shot of my finished Acme Tow Dolly trailer. Thanks again for the speedy shipment. 485295



- AM31215
by:

Wow what great service! Tires and rims look great and where perfect fit! Really enhance the look of my trailer too! Can't beat free shipping and I received them the next day! Awesome!!! 290131



- AM31215
by:

Tire change out 497177



- AM31215
by:

Just wanted to say thanks to Natalie and the people at e trailer. The wheels and tires are great got them on the day I was supposed to. 569574



- AM31215
by:

So far so good, put them on my boat trailer but have only been fishing a few times since. 569086



- AM31215
by:

Only driven about a hundred miles on them, but so far, seem to be doing fine. Look good too 633817



- AM31215
by:

Tires and wheels came today and look great can't wait to hit the road 612856



- AM31215
by:

Shipped fast in strong, sturdy container. Very good quality set of wheels and tires. Excellent transaction. 601159



- AM31215
by:

Showed up promptly looks good wish they would iffer 1 set of lugs and lock regulat price and get one set 50% off to the specific application use of you're order other than that great place to do business 589437



- AM31215
by:

These are the quality of tires and wheels I was wanting. Great delivery time. 525520



- AM31215
by:

Love it looks good 506052



- AM31215
by:

The wheels look great on my aluminum utility trailer. They've only been on for a week, so I can't say a lot about the tires. etrailer is an awesome retailer, and their prices seem to be very competitive. 502870



- AM31215
by:

Very satisfied on EVERYTHING I ordered. The trailer tire was below retail price and an excellent deal. The spare tire holders equally excellent purchase. First I heard of etrailer.com. Its my default website for my trailer needs. Its a NO BRAINER.... 502294



- AM31215
by:

Nice product. I didn't care for the short, fat tires that came with my Triton utility trailer and swapped them out for these and have been very pleased. 490560



- AM31215
by:

As always outstanding service and support !! Ordered trailer wheels and tires and arrived 2 days later !! Wasted a day driving to tire stores only to find nothing in stock and not what I needed if they did order. The product information and ordering assistance on this website is top notch. Will always go here first from now on ! 464280



- AM31215
by:

awesome service, and great tires with good prices. 437509



- AM31215
by:

Very good quality wheel just like in picture. Excellent fit and finish for my PWC trailer. Load range E tire for peace of mind. 426529



- AM31215
by:

Adam was very helpful and we came up with the best wheel and tire for my new smoker trailer I just finished. Showed up at my house earlier than expected. Very happy with my experience. 424717



- AM31215
by:

I bought the wheel and tire for a spare for pontoon boat trailer. Everything was delivered as promised and looks very good. I'm very happy with purchase. 408798



- AM31215
by:

The 5 leg aluminum wheels are great. 402198



- AM31215
by:

I NEVER THOUGHT OF ORDERING MY TRAILER TIRES/WHEELS MOUNTED OR ONLINE. THESE LOOK GREAT AND THE WHOLE ORDERING PROCESS WAS EASY, I RECEIVED THE SET IN A FEW DAYS AS PROMISED. I HAVE ORDERED FROM ETRAILER ONCE BEFORE AND WILL CONSIDER THEM AGAIN. PRICE OF SET AND SHIPPING WAS VERY FAIR. I ALSO WANTED TO MENTION THE SHIPPING CONTAINER WAS A GREAT IDEA. 331057


Comments

Working great 1 year later! no Issues. Used them on a heavy enclosed trailer with ATV or snowmobiles quite a few times last year.

JIMBO - 01/09/2018

32779

- AM31215
by:

fast shipping! arrived in perfect condition. Box handle cutouts could use a little bit more reinforcement, a couple of them teared while carrying the heavy tires. 309419



- AM31215
by:

Great looking tires and wheels. Perfect replacements for the old A78-13-st that were originals on many Shorelandr Trailers. Etrailer.com was great to work with and looking forward to many more positive transactions!! 242463



- AM31215
by:

Great tire and rim combo, Love he way it looks and drives on my Pop-Up Camper. 240682



- AM31215
by:

Tire came much earlier than initially promised. Was a small mix-up in the initial order confirmation, but they straightened it out promptly. This will be the spare on the Compact III project in progress, and will join its other two brothers in travels. Thanks a lot E-trailer! 226411



- AM31215
by:

These are a replacement on a comfab single pwc trailer. The stock tire was a 4.8/12 bias tire. These are just a tad bigger but fit great and look much better. Also, they ride WAY better. The bouncy ride from the stock tire is gone. Hopefully they will last, I don't doubt they will. Shipping way great, ordered around 1pm and it was shipped same day. Get the lugs that are recommended and the 3.19" center cap for a complete package, looks great! 205952



- AM31215
by:

Great looking ,quality tires for the pr ice. 200925



- AM31215
by:

Thank You, Can't believe wheels showed up that quick , just ordered some bearings, I found a new friend, Thank You Again 183214



- AM31215
by:

eTrailer, you all saved our vacation. The tire was a perfect fit for our trailer, and the order process and customer service were excellent. After we had a blow-out 1 hour from our destination, we were able to place the order online that evening and call to confirm the order first thing the next morning. Shipping info was confirmed quickly, and we received the tires just in time for our return journey. Thank you, sincerely. 171141



- AM31215
by:

Great product and super fast shipping great prices....thanks etrailer.com. tony 93029



- AM31998
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


I purchased 5 of these tires to replace old bias ply tires on a tandem axle boat trailer. The trailer carries at 19.5 ft. Stratos center console fishing boat. The tires have performed perfectly over the first year of ownership and appear to be very high quality. The wheel is really nice looking and gave my older trailer a nice face lift. I would recommend these wheels and tires... great combination. 607093



- AM31959
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


Great product and great price with the combo including the spare tire bracket and free shipping what a deal. 12709



- AM32684
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


good value for the product and delivered on time 388667



- AM31998
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


Delivery was prompt. I also bought stainless steel hub covers and SS lug nuts to match. I mounted a pair on my camper for a 1500 mile mountain trip. Every time I stopped, they were barely warm. The trailer tracked well and rode smoothly, which minimized trailer induced motion in my tow vehicle. etrailer weight matches the tires and wheels, and my local tire shop only had to balance one of the three (I ordered a spare). I have no complaints and would order again. 45603



- AM31998
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


I received my new wheels and tires three days after ordering them. The service was great and my product was perfect. Soon I will have a chance to tow it to the river and test them out. I'll send pictures with the next review. 116744


Comments

A year later and they still work great. It sits more than I would like, but time is rare

Lewis M - 05/25/2015

12024

- AM31998
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


I have bought items from etrailer before and it is an excellent company to buy from. I just bought the tire and wheel to use as a spare for my camping trailer. Their price can't be beat and the free shipping for items over $100.00 is a deal that can't be beat. Their followup and tracking of the item is fantastic. The people who work their are also extremely helpful and polite. It arrived in two days from UPS. That is incredible. Fantastic company and would highly recommend. 481383



- AM31998
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


Great product, but you can buy a great product many places, maybe not at the same price. The big difference is their service and prices (free shipping) on this order! I ordered these on Monday at 4:00 PM and I received them Wednesday morning, plus a representative called me Monday night to confirm the order and shipping address. I will most definitely use this company in the future!! 186449



- AM31206HWTB
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


Fast delivery, great product, and the price was good! I believe I have already said this... 422522



- AM31998
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


First off what can i say, Kudos to George and staff. The tires and rims that i order are not like the photo. They look a lot BETTER. They ride great on my boat trailer. I have a 2010 avalanche with the 5 spoke polished aluminium rims, almost a perfect match. I received them in an expeditious manner. I Also purchased the matching chrome lugs nuts. I am also going to get the chrome Bearings Buddy Bearing Protectors. Received a lot of complement from friends and neighbors who saw the old white rims, and they really like the new ones. First thing they say is that they match the truck rims (Ya) (Boat is white with gray silver metallic trim) Perfect match. ENOUGH SAID ....... 471440



- AM31208HWT
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


Love the new wheels and tires 342098


Comments

Still good thanks

Chris R - 02/16/2018

34772

- AM31206HWTB
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


Looks good and rides good. The tire arrived in a timely manor. Also the tires were stamped 2017. 446748



- AM32684
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


Needed new tires and my old steel wheels were rusting a bit. Decided to spend a bit more and update to bright polished aluminum wheels as well. Made my 1999 36' trailer look years newer. I got a cell phone call 7 miles on my trip saying...wow...those wheels dressed it up. You should have done that years ago. 434123


Comments

Not sorry in any way I did the swap. They are bright and shiny.

IP - 09/19/2018

43787

- AM31998
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


After asking all local tire shops about Load D 13" tires and being told they don't have and can't get. I looked them up online and found them here and purchased them. Etrailer.com upgraded my shipping for free and I had them at my door in 2 days! I got them installed and they look and ride great! And the price was way better than I thought it was going to be, Thanks Etrailer.com I will reccomend your site to everyone! Chris W. 43324



- AM31206HWTB
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


Great price, quick shipping and exactly as ordered. I will recommend etrailer to others and will purchase from again when needed in the future. 264902



- AM31206
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


I had a flat on my boat trailer returning home from a Minnesota walleye fishing trip. A few of the guys I was fishing with told me about E Trailer and how great they were so I called them to order this new tire & rim combo. The product shipped the day I ordered it and arrived the next morning via UPS. I was able to mount the new tire & rim, seems to fit well only problem is that I don't have correct lug bolts which I ordered and those shipped same day and are delivering next day. Overall I would highly recommend this company, the people are really friendly, helpful if you aren't 100% sure of exactly what you need. Heidi, Judy and Kevin all helped me with my orders and they were really great folks. I'm ordering rest of my boat trailer tires from this company from now on. 567327



- AM32195
by:

Review from a similar Kenda Karrier Aluminum in Tires and Wheels


All I can say is awesome,awesome,awesome experience. 115294


Comments

The tire is for a spare right now plan on getting another to put on my boat trailer. Great tire and rim can wait to see them both on my trailer.

rmspecialized - 01/30/2015

9101
53
215
Show More Reviews

Ask the Experts about this Kenda Tires and Wheels
Do you have a question about this Tires and Wheel?


  • Replacement ST145/R12 Tires and Wheels for 2012 Triton Trailer
  • We do have a nice selection of ST145/R12 tire and wheel sets that will work great on your 2012 Triton Trailer. For a Load Range E Tire, we have the Kenda Karrier S-Trail Radial Tire w/ 12 Inch Aluminum Wheel # AM31215. This tire has a 10-ply rating and a 1,520 pound maximum load at 80 psi. The aluminum wheel has a 5 on 4-1/2 bolt pattern and a sharp star spoke design. For the Load Range D options, a lot will depend on the type of wheel you are looking for. For example, the # AM31199DX...
    view full answer...

  • Wheel Lug Nut Torque Recommendations for 1/2-Inch Stud and 12-Inch Aluminum Wheel
  • Torque specs for wheel lug nuts vary depending on several factors like stud size, wheel size and wheel material. The linked image provides a listing of commonly recommended torque values. The studs on your hubs # A35RS545E are 1/2-inch diameter and since your wheels # AM31215 are aluminum, you'll use a torque range of 75-85-ft-lbs. We offer torque wrenches like # ALL944001 if you need one.
    view full answer...

  • Tire and Wheel Compatible with Acme EZE Tow Dolly
  • The Kenda Karrier S-Trail ST145/R12 Radial Tire w/ 12" Aluminum Wheel - 5 on 4-1/2 - Load Range E # AM31215 will fit your Acme EZE tow dolly based on their spec sheet. These tires have a 10 ply rating, a load capacity of 1520 lbs at 80 psi each, and come with a 2 year warranty. They have automotive grade sipes in the tread to give you excellent traction even in wet conditions. If you want to finish the look, I also recommend the Trailer Wheel Center Cap, Chrome, 3.19" Pilot Size #...
    view full answer...

  • Trailer Tires or Tire and Wheels to Replace A78-13ST Tires on a ShoreLander Trailer
  • The modern equivalent of the A78-13ST is ST175/80-13. Since that size will not work for you the only option is to go to a 12 inch tire and wheel. The other places must have only had a limited selection because you can get a 145/80-12 with a capacity as high as 1,520 pounds. If the trailer has a 4 on 4 bolt pattern, see link on how to determine bolt pattern, then you can use tire and wheel combo # AM31208. This is a radial tire on an aluminum wheel so it would be excellent for marine...
    view full answer...

  • Radial Tire Recommendation to Replace 20.5x8x10 Tire
  • If you are dead set on getting a radial tire you would need to go to at least the 12 inch wheel size 145R12 like the part # AM10130 which is a radial. If you wanted to go with a wheel and tire combo we have the part # AM31215 which has a 5 on 4-1/2 inch bolt pattern or part # AM31208 which has a 4 on 4 inch bolt pattern. Overall tire diameter would increase about an inch.
    view full answer...

  • Replacement ST145R12 Tire and Wheel for Acme Tow Dolly
  • Any trailer or tow dolly tire should always be inflated to the maximum psi pressure shown on the tire sidewall. It is never appropriate to under- or over-inflate a trailer/dolly tire since only when fully inflated can the tire deliver its rated weight capacity. Naturally it is also important that the vehicle loaded on the dolly be within the dolly's rated capacity. Acme offers several different dolly products and these are specified to use Load Range E tires in size ST145R12. Their...
    view full answer...

  • Largest Wheel and Tire Size Available to Fit on 2,000 lb Trailer Axle
  • Most hubs that fit a 2,000 lb axle can only fit up to a 12 inch diameter wheel. What size wheels/tires do you have now? There might be a larger size available but probably only up to a 12 inch wheel setup. The part number # AM31215 is a wheel and tire with the tire size ST145R12 that matches your bolt pattern. It's overall diameter is 21.3 inches and has a section width of 5.7 inches. This would be the largest wheel setup I can feel safe about recommending right now.
    view full answer...

  • Comparing Trailer Tire Sizes ST145/80R12 and 5.30-12
  • Trailer tire sizes ST145/80R12 and 5.30-12 both fit on 12 x 4-inch wheels and when mounted both will have similar overall diameters; 21.9-inches for a 5.30-12 like Kenda # AM30820 and 21.3-inches for an item like # AM31215. We offer both of these tire sizes in several choices of Load Range. You can click on the links in the article I included for you see products in both tire sizes. Links to 5-on-4-1/2 wheels/tires in both sizes are provided for you. Please note that size 5.30-12...
    view full answer...

  • How to Get the Most Out of Your Trailer Tires
  • We have just what you are looking for. Although we do have load range D tires in the 5.30-12 size they are bias as opposed to radial in style. Bias tires are meant more for off-road purposes like agriculture whereas the radial tires have a sidewall with more flex that can better dissipate the heat build-up than bias can. I recommend going with the Taskmaster 5.30R12 Radial Trailer Tire # TT53012C. It has a load range of C (Maximum load: 1,050 lbs at 80 psi), a max speed rating of 81...
    view full answer...

  • Trailer Rim and Tire Recommendation for a Tandem Jet Ski Trailer
  • The wheel and tire combo part # AM31215 that you referenced would work well for you. Based on the lug dimension you gave me you have a 5 on 4-1/2 inch bolt pattern like this rim, the tires are very similar in overall diameter. The center cap part # AM90175 would work well with this wheel and the lug nuts part # AM90054 that you referenced would also work well as long as you have 1/2 inch wheel studs.
    view full answer...

  • Backspacing Dimension for the Trailer Wheel and Tire # AM31215
  • What you are looking for is the backspacing of the trailer wheel and tire part # AM31215. Which this wheel and tire has a backspacing of 3 inches. This means you'd have 1/2 an inch of clearance on your setup since you have 3.5 inches from the hub face to the axle frame.
    view full answer...

  • What is the Recommended Tire Pressure for the Karrier ST145R12 Radial Trailer Tire AM31215
  • With trailer tires you have to keep the pressure at the max rating that you see listed on the sidewall. For the part # AM31215 that you referenced you would need to keep the tire inflated to it's 80 psi max rating. This ensures that you get the full capacity for the tire and prevents heat build up which ultimately causes tire failure.
    view full answer...

  • Kenda Karrier S-Trail ST155/R12 Compatibility With 12x4.5 Inch Wheel
  • I reached out to the manufacturer and the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E # AM10140 will fit a 4.5 inch wide rim, however it may change the load capacity as the tire may be stronger than the wheel. If you have a heavy load you are carrying, you may want to have a 12x4 inch rim. We do have some pre-mounted options for that tire: Kenda Karrier S-Trail ST145/R12 Radial Tire w/ 12" Aluminum Wheel - 5 on 4-1/2 - Load Range E # AM31215 Kenda Karrier...
    view full answer...

  • Do Aluminum Trailer Wheels Weigh Less than Steel Trailer Wheels
  • The aluminum wheel used on tire and wheel combo # AM31215 weighs about 2 to 2-1/2 pounds less than the comparable steel wheel # AM20132 if you look at the shipping weight. But in reality the weights are closer with the steel wheels being just a little heavier. If you want to go with the lightest option I would go aluminum.
    view full answer...

  • Switching to Smaller Trailer Tires on Robalo Boat Trailer for Better Garage Clearance
  • The overall diameter of an inflated ST205/75R15 trailer tire is just over 27-inches. The size ST145/80-12 has an overall inflated diameter of just over 21-inches. Switching between the two would give you a height drop of half this difference, about 3-inches as you noted. An E-rated tire in size ST145/80-12 will offer a weight capacity of 1520-lbs, such as Kenda # AM31215, which mates this tire size with a 5-on-4-1/2 bolt pattern aluminum wheel. As long as your hubs have this same bolt...
    view full answer...

  • Can Americana Wheel/Tire # AM31215 Be Substituted for Kenda Wheel/Tire # AM30861
  • Thank you for your purchases from etrailer! We do not recommend mixing tire sizes, types or load ranges. In the case of the two tire/wheel items you referenced, Kenda # AM30861 D-range bias tire and Americana E-range radial tire # AM31215, you would be mixing two factors, type and load range. The slight difference in overall diameter between the two will not be the primary concern but as this would be a third variable (!) I do not suggest this practice. It is a better idea to replace...
    view full answer...

  • Recommended Tires for Pontoon Boat Trailer and Speeds Around 75 MPH
  • For your pontoon boat trailer, I recommend moving to a larger tire so that you can get the speed rating you need. I would only move up one size, so you don't go too far with adding height to your trailer. I recommend the Taskmaster 5.30-12 Bias Trailer Tire with 12" White Spoke Wheel - 5 on 4-1/2 - Load Range C # TTWAS53012WS45HP which are rated for up to 1,050 lbs at 80 psi and have a speed rating of 81 mph max. You will want to be aware of the overall dimensions of the tire so...
    view full answer...

  • Replacement 12-Inch Trailer Wheel/Tire Combination with 5-on-4-1/2-Inch Bolt Pattern
  • In a 12-inch rim size with a 5-on-4-1/2-inch bolt pattern we offer a range of pre-mounted wheel/tire combinations in both bias ply and radial types and in several different load ranges. The link provided will let you see all such combinations, which include 145/80-12, 4.80-12 and 5.30-12 tire sizes. I also linked an article on trailer tires that may be helpful. Please note that all of these tire sizes are a 4-inch width. The highest-rated among them is the Load Range E combination, part...
    view full answer...

  • Correct Wheel/Tire Combo for Sporthaven Snowmobile Trailer
  • I believe I found your snowmobile trailer online. It appears that the trailer uses ST145/80R12 load range E tires and wheels with a 5 lug on a 4-1/2 inch bolt circle. If this tire and wheel bolt pattern information is correct, we do indeed have a compatible wheel/tire combo for you, part # AM31215. This features a load range E radial tire mounted on an aluminum rim. If you just need the tire, you can use the # AM10140 which is a Load Range E radial tire. I've linked you to a help...
    view full answer...

  • Lug Nuts for Karrier ST145R12 Radial Trailer Tire w/ 12" Aluminum Wheel AM31215
  • Lug nuts do not come with tire and wheel combo # AM31215. Regular lug nuts do not work well with aluminum wheels so I recommend using # 12CLN sold in quantities of one.
    view full answer...

  • Recommended Wheel For Trailer W/12 inch x 4 inch 5 on 4-1/2 Bolt Pattern
  • Since we do not carry any radial tires that are size 5.30-12, the next closest option is a 145/80-12 sized tire. The new tire is about 1/2 inch smaller so it will work great for you. Radial tires are a good choice because they flex more than a bias tire which gives better ground contact, traction, stability, and tread wear. Radial tires generally run cooler than bias tires as well which usually leads to a longer tire life. With your wheel size, you have several options. I recommend the...
    view full answer...

  • Availability of Trailer Wheel and Tire to Replace a 155R12
  • A 155/12 tire will be about 6.1 inches wide. The closest match is a 145/12 at 5.7 inches wide. I have included a link to all of the tires and tire/wheel combos we have in this size. A 155 isn't a trailer tire size (unless it has an ST in front of the size). For a wheel and tire in this size on a 5 lug wheel you would want the part # AM31215.
    view full answer...

  • Recommended Tire And Wheel Combination With 1,520 lb Max Load Capacity
  • For the load and sizes you are looking for, I recommend the Kenda Karrier S-Trail ST145/R12 Radial Tire w/ 12" Aluminum Wheel - 5 on 4-1/2 - Load Range E # AM31215. This is a 12x4 aluminum wheel with a 5 on 4-1/2 bolt pattern. It is paired with a radial tire with 10 ply rating and 1,520 lb max load at 80 psi. I've attached a review video of this combination.
    view full answer...

  • Replacement ST145/80-12 Tires for 2003 Rockwood Freedom M-1910 Camper Trailer
  • Based on my research I believe the tire size on your 2003 Rockwood Freedom Model M-1910 camping trailer is actually ST145/80-12. Online specs for the M-1910 indicate a dry weight of 1719-lbs so your estimated GVWR of 2323-lb sounds about right. Still, I suggest checking the trailer's main identification plate (which has its VIN) to find the GVWR, which is the most it can safely weigh when fully loaded. Once you have confirmed the trailer's GVWR it is simply a matter of dividing that...
    view full answer...

  • Smaller Tire Recommendation to Replace a ST175/80R13 without Losing Weight Capacity
  • The load range C ST175-80-13 tires you have on your trailer currently should have a capacity of 1,360 lbs. To reduce your overall tire diameter about an inch without reducing your weight capacity you would want to go with a rim and tire combo with a 145/80-12 tire that is Load Range E like part # AM31215. This actually has more capacity at 1,520 lbs when inflated to 80 psi. The bolt pattern of the rim of this combo is 5 on 4-1/2 inches. To determine your bolt pattern check out the...
    view full answer...

  • Availability of Custom Wheel/Tire Package
  • As we don't have the equipment necessary to mount tires to the rims, we don't sell the # AM10140 tire mounted on the # AM22319HWTB wheel you asked about. You'd need to purchase the wheel and tire separately, and have them mounted at your local tire shop. The wheel/tire combos we sell aren't balanced in the traditional sense. When the tires are mounted to the rims, the high (heavy) spot on the wheel is matched to the low (light) spot on the tire, which leaves the wheel and tire somewhat...
    view full answer...

  • Recommended Wheel and Tire with a 5 on 4-1/2 Bolt Pattern to Lower a Trailer by a Few Inches
  • In order for you to have a lower trailer you will have to go with a 12-inch wheel and tire combo. A 13-inch tire will only yield a 1/10th inch drop. The wheel and tire I recommend is the Karrier radial # AM31215. It will have a ply rating of 10 and a 1,520 pound maximum load at 80 psi. If this capacity is high enough for the gross trailer weight, then you can use it. With this tire and wheel combo you will see nearly a 3-inch drop. The reason I would go with a radial tire is it flexes...
    view full answer...

  • Special Trailer Tire to Replace Size 155R12 on Pontoon Boat Trailer
  • The width of a 155/12 tire is just over 6-inches. The closest match in a special trailer tire size is a 145/12 at 5.7-inches wide. I have included a link to all of the tires and tire/wheel combos we have in this size and with a 5-on-4-1/2 wheel lug pattern. We have this tire size in two Load Range ratings, most in LR D and one, # AM31215, in a higher-capacity LR E. This item mates a nice aluminum wheel (no worry about rust with this one) to a radial tire that can handle up to 1520-lbs...
    view full answer...


Do you have a question about this Tires and Wheel?




  • Why etrailer.com?

    At etrailer.com we guarantee:

  • Highest quality tires and wheels for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate tires and wheel information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Satisfaction Guarantee
    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Michael L
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Updated by:
Laura H
Photos by:
Jim W
Installed by:
Cole B
Updated by:
Mary E
Updated by:
Sarah W

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.