The best 145R12 tire and rim depends on your trailer’s required load rating and wheel fitment. The silver Load Range D assembly is suited to buyers needing a single replacement wheel, while the two-pack suits replacing a pair. For higher per-tire capacity, the Load Range E assembly offers a 1,520-pound rating. Confirm your trailer’s bolt pattern, rim dimensions, pressure requirements, and load limits before ordering.
| Product | Best For | Key Specs |
|---|---|---|
| Silver Load Range D, single | One-wheel replacement | 1,220 lb; 65 PSI; 12 x 4.5 rim |
| Silver Load Range D, two-pack | Replacing two assemblies | 1,220 lb per tire; 65 PSI |
| Black Load Range D, two-pack | Black wheel preference | 1,220 lb per tire; 12 x 4 rim |
| Deep Tread Load Range E, two-pack | Higher load rating in tires | 1,520 lb per tire; 80 PSI |
| Silver Load Range E, single | One-wheel replacement with higher rating | 1,520 lb; 80 PSI; 12 x 4 rim |
eCustomrim Silver Load Range D Assembly
This single ST145R12 radial assembly is best for a trailer owner replacing one wheel while matching a 12 x 4.5-inch rim. Its Load Range D tire has a listed maximum load of 1,220 pounds and a maximum pressure of 65 PSI. The assembly includes the tire, wheel, and valve stem, and the listing describes these components as DOT-approved.
- Rim: 12 x 4.5 inches
- Center bore: 3.19 inches
- Bolt pattern: 5 lug on 4.5 inches
- Overall tire diameter: 21.5 inches
Choose this if your trailer’s specifications call for this rim and Load Range D. It includes a six-year manufacturer’s warranty with roadside assistance, according to the listing. Avoid choosing it based on tire size alone: verify the wheel dimensions and your trailer’s load requirements first.
eCustomrim Silver Load Range D Two-Pack
This two-pack is best for buyers replacing two trailer tire and rim assemblies at once. Each radial tire is listed with a 1,220-pound maximum load, 65 PSI maximum pressure, and 21.5-inch overall diameter. The silver 12 x 4.5-inch rims have a 3.19-inch center bore and a five-lug, 4.5-inch bolt pattern.
The package includes complete assemblies with valve stems, which can simplify a paired replacement when the trailer’s fitment matches. The listing states that the tire, wheel, and valve stem are DOT-approved and includes a six-year manufacturer’s warranty with roadside assistance.
Choose this instead of the single assembly when you need two matching wheels. Its limitation is the Load Range D rating: each tire is rated for up to 1,220 pounds, so it may not meet a trailer’s specified capacity if a higher rating is required.
eCustomrim Black Load Range D Two-Pack
This black two-pack is best for buyers who want two complete assemblies with black rims and whose trailer accepts a 12 x 4-inch wheel. The ST145/R12 radial tires are Load Range D, with a stated maximum load of 1,220 pounds per tire and maximum pressure of 65 PSI. Each tire has a listed overall diameter of 21.5 inches.
- Rim size: 12 x 4 inches
- Center bore: 3.19 inches
- Bolt pattern: 5 lug on 4.5 inches
- Includes tire, wheel, and valve stem
The listing identifies the components as DOT-approved and states that a six-year manufacturer’s warranty with roadside assistance is included. Compare its 12 x 4-inch rim with the 12 x 4.5-inch silver options before buying; the dimensions are not interchangeable assumptions. This is not the higher-capacity choice in this group.
eCustomrim Deep Tread Load Range E Tires
This two-pack is best for buyers seeking 145/R12 trailer tires with a higher listed load rating and deep tread, without a rim included in the product description. Each tire supports up to 1,520 pounds and has an 80 PSI maximum pressure. The listed overall diameter is 21.5 inches.
The deep tread is described as designed for traction and control across varied road conditions. A scuff-guard sidewall is intended to help protect against curb and road damage. These features may matter to owners who use their trailer frequently or encounter tight turns and roadside contact.
Choose this if you need tires only and will use compatible existing wheels. The key limitation is that this listing does not specify a rim or wheel assembly, so it is not a ready-to-install tire-and-rim package. Confirm tire mounting requirements and wheel compatibility before purchase.
eCustomrim Silver Load Range E Assembly
This single silver assembly is best for replacing one wheel when the trailer calls for a Load Range E tire. It has a listed maximum load of 1,520 pounds and maximum pressure of 80 PSI, with a 21.5-inch overall diameter. Its 12 x 4-inch rim has a 3.19-inch center bore and a five-lug, 4.5-inch bolt pattern.
The tire, wheel, and valve stem are described as DOT-approved. The listing also states that the assembly includes a six-year manufacturer’s warranty with roadside assistance. Choose it over the Load Range D single if your trailer’s specifications require the higher stated load rating.
Check the rim width carefully: this assembly uses a 12 x 4-inch rim, unlike the 12 x 4.5-inch silver Load Range D assembly. The higher rating does not mean it is suitable for every trailer; follow the vehicle or trailer manufacturer’s load and pressure guidance.
Buying Guide: How To Choose A 145R12 Tire And Rim
What load rating does your trailer require?
Compare the tire’s load range and per-tire capacity with the trailer manufacturer’s requirements. The Load Range D options listed here are rated for up to 1,220 pounds per tire; the Load Range E options are rated for up to 1,520 pounds per tire. Do not exceed the trailer’s axle, wheel, or tire limits, and do not assume that a higher-rated tire changes the trailer’s rated capacity.
Does the wheel match your trailer?
Check all fitment details, not just the 145R12 size. Confirm rim width, center bore, lug count, and bolt-circle measurement. The options here include 12 x 4-inch and 12 x 4.5-inch rims, while the listed bolt pattern is five lug on 4.5 inches. Verify these measurements against the trailer’s existing wheel or documentation.
Do you need tires only or complete assemblies?
A complete assembly includes a tire and wheel, and the listed assemblies also include a valve stem. That can suit a wheel replacement. The deep-tread Load Range E two-pack is described as tires rather than complete rim assemblies, so it is better for buyers who already have compatible wheels or plan to obtain rims separately.
Should you buy one or two?
A single assembly is appropriate when replacing one wheel and the remaining equipment is suitable. A two-pack can be more practical when replacing a pair, but confirm that both tires meet the trailer’s requirements. The product quantity alone does not establish the number of tires needed for your trailer.
What pressure should you use?
The listed maximums are 65 PSI for Load Range D and 80 PSI for Load Range E. These are product limits, not a substitute for the trailer maker’s recommended operating pressure. Check the tire information and trailer guidance before inflation or travel.
Frequently Asked Questions
Are 145R12 and ST145R12 trailer tires the same size?
The products listed use 145R12 or ST145R12 size wording. Check the exact tire specification required by your trailer and compare the full product details before buying.
What is the difference between Load Range D and Load Range E?
In these listings, Load Range D is rated up to 1,220 pounds per tire at a maximum of 65 PSI. Load Range E is rated up to 1,520 pounds per tire at a maximum of 80 PSI.
Do all of these products include a rim?
No. The four products described as tire and rim assemblies include wheels. The deep-tread Load Range E two-pack is described as tires and does not list rims.
Will any five-lug 145R12 rim fit my trailer?
No. Confirm the bolt pattern, rim width, center bore, and other required fitment details. A matching tire size does not guarantee that the wheel fits.
Can I inflate the tire to its listed maximum pressure?
The listed PSI is a maximum, not a universal recommended setting. Follow the trailer manufacturer’s guidance and the tire’s instructions for the correct operating pressure.