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Contender ST225/75R15 Radial Trailer Tire w/ 15" White Mod Wheel - 6 on 5-1/2 - Load Range D

Contender ST225/75R15 Radial Trailer Tire w/ 15" White Mod Wheel - 6 on 5-1/2 - Load Range D

Item # AC225R6WM
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Shipping Weight: 48 lbs
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Tires and Wheels AC225R6WM - Radial Tire - Taskmaster
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Radial tire has 8-ply rating and a 2,540-lb max load at 65 psi. 15" x 6" Steel wheel has a 6 on 5-1/2 bolt pattern. 3-Step powder coat finish resists rust. Improved torque retention secures wheel. Complimentary roadside assistance included. Lowest Prices for the best tires and wheels from Taskmaster. Contender ST225/75R15 Radial Trailer Tire w/ 15" White Mod Wheel - 6 on 5-1/2 - Load Range D part number AC225R6WM can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (256)
  • Q & A (8)
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Taskmaster Tires and Wheels - AC225R6WM

  • Tire with Wheel
  • 15 Inch
  • 6 on 5-1/2 Inch
  • 225/75-15
  • Load Range D
  • Steel Wheels - Powder Coat
  • Radial Tire
  • Taskmaster
  • Standard Rust Resistance

Radial tire has 8-ply rating and a 2,540-lb max load at 65 psi. 15" x 6" Steel wheel has a 6 on 5-1/2 bolt pattern. 3-Step powder coat finish resists rust. Improved torque retention secures wheel. Complimentary roadside assistance included.


  • Tire-and-wheel assembly is ideal for stock trailers, utility trailers, and campers
  • Steel wheel with modular design is sturdy and corrosion resistant
    • 3-Step finishing process includes phosphate zinc bath, e-coat primer, and white powder coat on outboard side
    • Inboard side is lightly e-coated to reduce friction and provide rust resistance with less flaking
  • Improved torque retention (ITR) technology helps to keep wheel securely in place on your trailer
    • Uncoated stud holes are beveled to offer better clamp force retention
  • Radial tire is constructed with double steel belts and double polyester cords
    • Great for highway use
    • Nylon tread-firming belt overlays help prevent tread separation
    • Tread depth bars offer a quick visual indicator of tread wear
  • 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
  • 2-Year Platinum Plus warranty includes emergency tire change service and other benefits
  • Assembly meets DOT specifications and exceeds FMVSS


  • Rim dimensions: 15" diameter x 6" wide
  • Bolt pattern: 6 on 5-1/2"
  • Wheel bolt size: 1/2"-20
  • Wheel capacity: 2,830 lbs
  • Pilot diameter: 4.25"
  • Offset: 0
  • Tire size: ST225/75R15
    • Section width: 8.78"
    • Outer diameter: 28.31"
  • Tire capacity:
    • Load range: D
    • Ply rating: 8
    • Maximum load: 2,540 lbs at 65 psi
  • Maximum speed: 81 mph (speed rating M)
  • Tread depth: 8.4/32"
  • 2-Year limited warranty

Platinum Plus Warranty with Roadside Assistance

This tire-and-wheel assembly comes with a Platinum Plus warranty that includes complimentary roadside assistance for 2 years. If your trailer has a flat tire, call the help line and a technician will come change out the flat tire with your existing inflated spare tire. The service is available 24 hours a day, 7 days a week. In addition to the roadside assistance, this warranty also includes other benefits and services.

Corrosion-Resistant Finish

The steel wheel goes through a 3-step finishing process that makes it both attractive and corrosion resistant. The wheel is first submerged in a zinc phosphate bath to ensure good paint adhesion. It is then e-coated with an acrylic primer base and the outboard side is finished with baked-on DuPont powder paint. The light e-coat on the inboard side of the wheel reduces friction between the wheel and your hub and eliminates the flaking that can occur with a heavily applied paint finish.

Improved Torque Retention Technology

Beveled Stud Holes Front and Back

The automotive-rated center disc is raised and the stud holes are beveled and uncoated for better clamp force retention. This technology helps the wheel stay tight against your hub without the need for constant retightening.

Standard Trailer Tire Tread

Contender Tire Tread

The standard tread on these tires has solid, continuous ribs, and it has very few sipes (or thin grooves) cut into the rubber. These tires are designed for use on trailers, so they don't require the level of traction that would be needed on a vehicle that is braking or steering.

Contender radials have double polyester cords and double steel belts. A protective layer of nylon is wrapped around the steel belts to help prevent tread separation.

Radial Tires vs. Bias Tires

Radial tire vs bias tire graphic

Radial ply tires are designed for trailers that are towed on the highway. The cords on a radial 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 and heat buildup, which leads to a longer tread life and improved steering at higher speeds.

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"

AC225R6WM Taskmaster Contender ST225/75R15 Radial Tire with White Modular Rim - 6 on 5-1/2 - LR D

Installation Details AC225R6WM Installation instructions

Video of Contender ST225/75R15 Radial Trailer Tire w/ 15" White Mod Wheel - 6 on 5-1/2 - Load Range D

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

Video Transcript for Taskmaster Tires and Wheels - Tire with Wheel - AC225R6WM Review

Customer Reviews

Contender ST225/75R15 Radial Trailer Tire w/ 15" White Mod Wheel - 6 on 5-1/2 - Load Range D - AC225R6WM

Average Customer Rating:  4.9 out of 5 stars   (256 Customer Reviews)

Radial tire has 8-ply rating and a 2,540-lb max load at 65 psi. 15" x 6" Steel wheel has a 6 on 5-1/2 bolt pattern. 3-Step powder coat finish resists rust. Improved torque retention secures wheel. Complimentary roadside assistance included.

- AC225R6WM

Ordered for my camper, just what i needed, great price and fast shipping, very pleased 538612

- AC225R6WM

Super easy! Super fast! Great product! 643607

- AC225R6WM

This fit exactly and matched my other tires. The air pressure was up to the right amount 65 psi. 639459

- AC225R6WM

Tire is a spare tire for my boat trailer. Fits trailer fine. Was a great price for tire and wheel. Shipping was super fast three days. 259668

- AC225R6WM

We had a flat recently while hauling a horse and being very cautious, we ordered this for a second spare for a 2 horse trailer. I like the fact that the wheel matches exactly the existing wheels, the tire is the same rating and it was less expensive to have delivered from etrailer than buying one locally! Great selection and service! 458935

- AC225R6WM

I bought this tire & rim as a spare for my new boat.. looks great 738789

- AC225R6WM

Like always... excellent service! Fast at shipping orders! Received them in 2 days and they are already on the trailer! 707727

- AC225R6WM

Great quality product, fast issue free service! Will buy from etrailer again! 674578

- AC225R6WM

Just what I expected!! Great service people polite and helpful and received item two days early!! It is nice to order and talk to real people. Thank You!! 673490

- AC225R6WM

Tires , delivery was excellent. I'm sure my UPS driver doesn't like me now though. Looking forward to installing them. Very happy with the product and service. Thank you ! 646518

- AC225R6WM

Got tire for second spare going with camper to beach and like extra tire your delivery was perfect and the tire should be exactly what i wanted with good price thank you 645161

- AC225R6WM

Awesome product and even better service! Extremely pleased with the communication from Helen ! Will definitely purchase from you again ! 634401

- AC225R6WM

The tire and rim had a great price and were shipped the same day, nice job, thanks 611145

- AC225R6WM

Exactly what I needed this time and every time I have ordered from etrailer perfect for any trailer application Tire and Wheel combo price is unbeatable 608048

- AC225R6WM

Both the wheel and the tire match my trailer wheels and tires exactly. Good price and quick shipping. 594451

- AC225R6WM

the tire and rim look great however the tag on the tire said22575r15 8ply load range d but the tire says22575r15 10 ply load range E on the sidewall It should work considering im using it as a spare 593693

- AC225R6WM

The new tires and wheels arrived fast and in good shape. These are replacing very old wheels and tires on my wife's horse trailer. Thanks again for your fast and efficient service! 588823

- AC225R6WM

Usually a good deal at a good price!!!! This was no exception. Can't go wrong unless you mess up and get the wrong product. 584908

- AC225R6WM

Very well pleased. Fair price, well made wheels, good tires, and extremely quick shipping. I am a repeat customer of eTrailer.com for these reasons. 584845

- AC225R6WM

Painless ordering process, quick delivery, great customer service as always from etrailer. 578608

- AC225R6WM

I have always had good products from and the products were always here they said 571960

- AC225R6WM

My trailer spare arrived a couple of days earlier then expected and it looks great. I would highly recommend it to anyone. 560867

- AC225R6WM

Anytime I have ordered I have received my order in less than a week. Prompt service. 555847

- AC225R6WM

Great pricing, quick delivery, excellent service!! 554538

- AC225R6WM

Great 549486

Show More Reviews

Ask the Experts about this Taskmaster Tires and Wheels

  • Does Pilot Size Matter for 15 Inch Tire and Wheel Combo With 6 on 5-1/2 Inch Bolt Pattern
    That's a good question although the pilot size will only matter if you are using hub-piloted wheels, which means the the wheel secures to the hub with bolts as opposed to lug nuts (lug-piloted wheel), or if the wheel itself has a smaller pilot hole than the hub. The 3-5/8 inch measurement you got is pretty common and it does sound like you are looking for a lug-piloted wheel, which is by far the most common. So for that you can absolutely use a ST225/75R15 or ST205/75R15 tire and...
    view full answer...
  • Difference Between Taskmaster Wheel and Tire ST225/75R15 and Kenda ST225/75R15
    The wheel and tire combos you mentioned are both similar in size and appearance as they are both Load Range D ST225/75R15 size tires mounted on a white wheel with 6 on 5-1/2 inch bolt pattern. The biggest difference is the speed rating of the tire. The part # AC225R6WM has a tire with a speed rating of 81 mph so it would be what I recommend. The Karrier is only rated for 65 mph. We go through so many tires here that most are only a few months old. You really do want to make sure your...
    view full answer...
  • Recommended ST225/75R15 Trailer Tire/Wheel Combo With White Modular Wheels
    We have several tire/wheel combos that will work for you. In order to find the right combo you will need to know the wheel bolt pattern you need. I have attached a helpful article that explains how to determine which bolt pattern you need. If you have a 6 on 5-1/2 bolt pattern I recommend the Contender, part # AC225R6WM. This is an 8-ply Load Range D radial tire with a maximum load capacity of 2,540-lbs at 65 psi. If you need a 5 on 4-1/2 wheel I recommend part # AC225R645SMV. This...
    view full answer...
  • Travel Trailer Tires Keep Blowing Out on the Same Side
    Tire failure can be caused by overloading the tire, exceeding the speed rating of the tire (which causes it to overheat), not having it inflated properly, and general damage like hitting curbs. Since you have just one tire on one side that keeps blowing out I think we can eliminate exceeding the speed rating although it would be a good idea to double check that as well. You will want to make sure that you are loading your trailer evenly (left to right as well as front to back) so...
    view full answer...
  • ST Rated Tire Recommendation to Replace P235/75R15 on Trailer
    P series tires should NOT ever be used on a trailer. They are not rated for the vertical load that trailers like your fifth wheel will see. You need to replace your tires with ST rated tires. The closest ST tire size is the ST225/75R15. Which for a wheel and tire in that size with a 6 lug pattern you would want the part # AC225R6WM for a spare. For just the tires of this setup you would want the part # C22515D.
    view full answer...
  • Are 20 inch Wheel Too Big for a 10 foot Trailer
    When you are looking at tires and wheels for a trailer the most important things are that the bolt pattern matches up with the hub and that the tire/wheel combination has the proper weight rating for the trailer. For example, the Taskmaster Contender # AC225R6WM is a ST225/75R15 Radial Tire that is mounted on a 15 inch wheel with a 5 on 4-1/2 inch bolt pattern. It has a Load Range of D which means it can carry 2,540 lbs at 65 psi. As long as you have your tires inflated to the recommended...
    view full answer...
  • Wheel Center Cap for Contender ST225/75R15 Radial Tire and 15" White Mod Wheel w/4.25 Pilot Hole
    Americana Trailer Wheel Center Cap # AM90154 was designed to fit wheels with a center pilot hole diameter of 4.25 to 4.27 inches so it will fit Contender ST225/75R15 Radial Trailer Tire w/ 15" White Mod Wheel - 6 on 5-1/2 - Load Range D Item # AC225R6WM.
    view full answer...
  • Suspension And Tire/Wheel Combo Recommendation For Old Trailer
    Based on the age of your trailer and the measurements you said you have on your axle we do not have matching replacement parts. I recommend starting with an entire system that will work for you. I recommend the Timbren axle-less system like part # A20RS545. Since none of the axles we offer have the dimensions you need you can eliminate that problem with the # A20RS545. This system bolts right to your trailer frame and includes hubs with a 5 on 4-1/2 bolt pattern. No more issues with...
    view full answer...

Do you have a question about this Tires and Wheel?

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Info for this part was:

Edited by:
Leah B
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Jeffrey L
Installed by:
Jeff D
Written by:
Mary E
Updated by:
Sarah W
Updated by:
Isabelle B

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