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Loadstar Tires 31212 ST145/R12 Bias Tire and Wheel Assembly 5-Lug 8-Ply White Modular

Manufacturer

Loadstar Tires

<h3>About Loadstar Tires</h3><p>When it comes to keeping trailers safely rolling across North American roads, few names carry more recognition than <strong>Loadstar</strong>. A flagship brand of Kenda Americana Tire &amp; Wheel — the distribution arm of global tire manufacturer Kenda — Loadstar has spent more than 50 years earning its reputation as a go-to solution for towable trailer, utility, RV, marine, and agricultural applications. Whether you&rsquo;re hauling a boat to the lake, moving cargo on a utility trailer, or heading out for an extended RV trip, Loadstar products are engineered with the demands of the road firmly in mind.</p><h3>Engineering &amp; Heritage</h3><p>Loadstar tires are engineered, designed, and tested at the Kenda Technology Center in Akron, Ohio — a facility dedicated to pushing the performance and durability limits of trailer tires. Kenda Americana operates multiple large distribution centers across the United States, ensuring consistent availability and quality control from the point of manufacture through to delivery. This end-to-end oversight — spanning design, manufacturing, quality control, and distribution — is what sets Loadstar apart in the special trailer (ST) tire segment.</p><p>The brand&rsquo;s lineup includes both bias ply and radial construction tires built specifically for trailer use. Unlike passenger or light truck tires, Loadstar&rsquo;s ST-rated tires are constructed to handle the unique stresses of being towed — including side-load forces, heavy cargo weight, and extended highway speeds. Models like the K353, K364, K397, and K550 cover a wide range of trailer sizes and load requirements, from compact boat trailers to heavy-duty commercial haulers.</p><h3>Tires Built for the Trailer</h3><p>At the core of the Loadstar lineup are its <a href="/7439-loadstar-tires-tire-7636">trailer tires</a>, offered in a broad spectrum of sizes, load ranges, and construction types. Loadstar ST tires feature advanced rubber compounds designed to maximize tread life and reduce rolling resistance, while their bias ply construction creates a flexible yet load-tolerant sidewall that minimizes trailer sway during towing. All tires are manufactured to meet or exceed Department of Transportation (DOT) highway use requirements, giving trailer owners confidence on every journey.</p><h3>Wheels Matched to the Task</h3><p>Loadstar&rsquo;s approach to trailer safety doesn&rsquo;t stop at the tire. The brand also offers a comprehensive range of <a href="/7439-loadstar-tires-wheel-7644">trailer wheels</a> — including steel, galvanized, and aluminum options — designed to complement their tire lineup. From classic spoke-style steel wheels to premium aluminum designs like the Galvstar&trade; galvanized wheel, there&rsquo;s a Loadstar wheel to match virtually any trailer setup. Properly matching the right wheel to the tire and axle load rating is critical for safe towing, and Loadstar&rsquo;s coordinated tire-and-wheel system makes that process straightforward.</p><h3>A Trusted Partner Across Industries</h3><p>Loadstar products are found as original equipment on trailers from major manufacturers across the United States and Canada. Their reach extends across boat trailers, snowmobile trailers, RV towables, agricultural equipment trailers, and utility haulers — a testament to the brand&rsquo;s versatility and the trust that both OEM builders and end-users place in their performance. For anyone seeking reliable, purpose-built trailer tires and wheels backed by decades of industry experience, Loadstar remains a proven benchmark.</p>

Part Number

31212
07/13/2036 12:59 PM
Sale Price

$152.27

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Loadstar 31212 is a complete bias tire and wheel assembly designed for trailer applications. This assembly combines a durable ST145/R-12 bias-ply trailer tire mounted on a white modular steel wheel with a 5-hole bolt pattern, providing a ready-to-install solution for utility trailers, boat trailers, and other towable equipment.

Key Features:

  • ST145/R-12 bias-ply construction for reliable trailer service
  • 8-ply rated for enhanced load capacity and durability
  • White modular wheel finish for clean, classic appearance
  • 5-hole bolt pattern for common trailer hubs
  • Pre-mounted and ready to install
  • 12-inch rim diameter
  • DOT approved for highway use

This tire and wheel assembly is ideal for replacement or upgrade applications on small to medium-sized trailers. The 8-ply rating provides excellent puncture resistance and load-carrying capability, while the bias-ply construction delivers a smooth ride and stable handling characteristics. The white powder-coated modular wheel offers corrosion resistance and maintains its appearance over time.

Products specifications

Ply Rating

8

Service description

ST145/R12

Max PSI

65

Measuring Rim Width

4.5

Overall Diameter

20.5

Width

145

Tread Depth

9.0

Rim Size

12.0

Load Capacity (LB)

1105

Load Range

D

Sidewall Style

BLACK

Bolt Pattern

5 on 4-1/2"

Finish

White

Maximum Load

1220 lbs.

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