The best 5th wheel trailer tire is one that matches the trailer’s required size, load capacity, wheel bolt pattern, and tire type. Among these options, the ROCKMAN ST205/75R15 assemblies are best for buyers seeking a radial tire with Load Range D, while the eCustomrim and Garvee sets are bias-ply options rated at Load Range C. Confirm your trailer’s specifications before choosing: the listed products have different bolt patterns and load ratings.
| Product | Best for | Key detail |
|---|---|---|
| ROCKMAN 5X5 Black, Pack of 2 | Higher-load radial replacement | Load Range D; 5X5-inch pattern |
| ROCKMAN 5X5 Black | Matching a 5X5-inch wheel setup | Load Index 107; 8-ply rated |
| eCustomrim Bias-Ply, Pack of 2 | Compatible 5-lug, 4.5-inch setup | Load Range C; 1,820-pound rating |
| ROCKMAN 5X5 Silver | Radial replacement with silver rim | Load Range D; 8 mm tread depth |
| Garvee Bias-Ply, Set of 2 | Load Range C replacement pair | 5-lug, 4.5-inch pattern |
ROCKMAN 5X5 Black Radial Pair
This pair is best for fifth wheel owners whose trailer calls for ST205/75R15 radial tires and a 5X5-inch wheel pattern. The listing specifies 8-ply rating, Load Range D, Load Index 107, and an M speed rating, which the product description states is up to 81 mph.
ROCKMAN lists a full nylon cap ply overlay across the tread and an 8 mm tread depth. Those details make this option a useful comparison for buyers who prioritize the stated tread construction and a higher load range than the Load Range C choices below.
Limitation: The 5X5-inch bolt pattern must match the trailer. Do not select this assembly based on tire size alone.
ROCKMAN 5X5 Black Trailer Tire
Choose this ROCKMAN assembly if you need an ST205/75R15 tire and a black mod rim with a listed 5X5-inch PCD. Its listed specifications match the other black ROCKMAN option: 8-ply rated, Load Range D, Load Index 107, and M speed rating.
The product description also specifies full-width nylon cap ply reinforcement and 8 mm tread depth. It is best for buyers comparing radial assemblies in this size who want the stated Load Range D construction. Check the wheel pattern, tire pressure requirements, and trailer load limits against the trailer manufacturer’s information.
Limitation: The supplied product details do not provide a different load or tread specification from the other black ROCKMAN listing, so compare the rim and package details carefully before ordering.
eCustomrim Bias-Ply Two-Pack
This two-pack is best for fifth wheel owners whose specifications call for ST205/75D15 bias-ply tires, Load Range C, and a 5-lug, 4.5-inch bolt pattern. The listing gives a maximum load of 1,820 pounds per tire, maximum pressure of 50 PSI, and overall diameter of 27.2 inches.
The assembly includes the tire, wheel, and valve stem. The listed rim is 15 by 5 inches, with a 3.19-inch center bore. These measurements help buyers check fitment against their existing setup. The product details also state that the assembly is DOT-approved and includes a two-year manufacturer’s warranty with roadside assistance.
Limitation: Load Range C and the stated maximum load may not meet every fifth wheel’s requirements. Verify the required capacity before purchase.
ROCKMAN 5X5 Silver Radial Rim
This silver-rim ROCKMAN option is best for buyers who need the listed ST205/75R15 radial tire and 5X5-inch pattern but prefer a silver wheel. It has the same stated tire specifications as the black ROCKMAN models: 8-ply rating, Load Range D, Load Index 107, and M speed rating.
The listed full nylon cap ply overlay extends across the tread area, and the stated tread depth is 8 mm. This makes it a direct alternative to the black-rim assemblies when rim color is a deciding factor and the trailer’s fitment requirements match.
Limitation: The listing does not provide a separate maximum load in pounds. Confirm that the load index and tire capacity meet the trailer’s requirements rather than assuming fit based on appearance.
Garvee Bias-Ply Tire Set
This set of two is best for buyers whose trailer uses ST205/75D15 bias-ply tires and a 5-lug, 4.5-inch bolt pattern. The listed tire is Load Range C and 6-ply rated, with a maximum load of 1,820 pounds and maximum pressure of 50 PSI. The white wheels measure 15 by 5.5 inches.
Compared with the eCustomrim set, Garvee lists a wider 5.5-inch rim and gives section width as 7.99 inches. These details make it important to compare the complete wheel dimensions, not just the tire size, when checking fit.
Limitation: This is a bias-ply option, not a radial tire. The listing’s Load Range C rating may be unsuitable if the trailer requires a higher capacity.
Buying Guide: How To Choose Fifth Wheel Tires
Which tire size and construction does the trailer require?
Start with the tire information on the existing tire and the fifth wheel manufacturer’s specifications. These products include ST205/75R15 radial tires and ST205/75D15 bias-ply tires. The letter “R” identifies radial construction, while “D” in these listed sizes identifies diagonal, or bias-ply, construction. Do not substitute a different size or construction without checking the trailer’s requirements.
How much load capacity do you need?
Check the required capacity for each tire and the trailer’s total loaded weight. The ROCKMAN models are listed as Load Range D, Load Index 107, and 8-ply rated. The eCustomrim and Garvee options are Load Range C, with stated maximum loads of 1,820 pounds per tire. These figures are not interchangeable; follow the trailer manufacturer’s load and inflation guidance.
Will the wheel fit the hub?
Match the bolt pattern, rim diameter, rim width, and center bore where provided. A 5X5-inch pattern is different from a 5-lug, 4.5-inch pattern. A tire with the correct size can still have a wheel that does not fit the trailer. Confirm measurements before ordering.
Should you buy a tire-and-wheel assembly?
A complete assembly can simplify replacement when the rim also needs changing. Compare what is included, the wheel dimensions, and whether the listing specifies a pair or single assembly. Check tire pressure recommendations from the trailer or tire manufacturer; do not treat a listed maximum PSI as the routine target for every load.
Frequently Asked Questions
Are all fifth wheel trailer tires interchangeable?
No. Tire size, load capacity, construction, wheel dimensions, and bolt pattern must match the trailer’s requirements.
Can I use a Load Range C tire instead of Load Range D?
Only if the trailer manufacturer’s specifications and the required load capacity allow it. A lower load range may not be adequate.
What does ST mean on a trailer tire?
ST identifies a special trailer tire designation. These listed products are marked for trailer use; verify the tire size and capacity for your specific fifth wheel.
Is radial or bias-ply better for a fifth wheel?
Neither construction is automatically right for every trailer. Choose the type specified by the manufacturer and compare the listed size and load capacity.
Does a matching tire size guarantee wheel fit?
No. The bolt pattern, rim width, diameter, and center bore must also fit the trailer hub and clearance requirements.