Best Spare Tire for Boat Trailer Options
Finding the right spare tire setup for a boat trailer means prioritizing durability, compatibility, and ease of maintenance. This guide highlights five reliable options that cover common boat-trailer sizes and bolt patterns. Whether you need a full tire-and-wheel assembly or a robust spare tire carrier, these picks are suited for different trailer configurations and towing needs. The top picks below help boaters choose based on load capacity, rim size, and mounting style—so you can tow confidently to the next marina or campground.
Buyer needs vary: some want ready-to-use assemblies with DOT-approved components, others seek strong universal carriers for on-trailer mounting. The following table summarizes the core specs of the selected products to aid quick comparisons.
| Product | |||||
|---|---|---|---|---|---|
| eCustomrim Radial Trailer Tire ST205/75R14 | Tire & Wheel Assembly | 14 in | Load D | 2040 lbs | 5-lug; DOT approved |
| GADFISH Spare Tire Carrier | Spare Tire Carrier | Not specified | — | Up to 150 lbs | Universal 4–6 lug compatibility |
| eCustomrim 2-Pack Trailer Tire Rim Assembly ST175/80D13 | Tire & Wheel Assembly | 13 in | Load C | 1360 lbs | DOT-approved |
| eCustomrim Single Trailer Tire Rim Assembly ST175/80D13 | Tire & Wheel Assembly | 13 in | Load C | 1360 lbs | DOT-approved |
| eCustomrim Trailer Tire Rim Assembly ST205/75D14 | Tire & Wheel Assembly | 14 in | Load C | 1760 lbs | DOT-approved |
eCustomrim Radial Trailer Tire ST205/75R14
This tire-and-wheel assembly is built to handle boat-trailer demands with a 2040 lb maximum load and 65 psi maximum pressure. It uses a 14-inch rim with five lugs and a 4.5-inch bolt circle. It is DOT approved and backed by a six-year warranty with roadside assistance. Best for boat trailers that require a ready-to-install, DOT-approved assembly and higher load capacity.
Best for boat trailers needing a strong, all-in-one tire and wheel option with roadside support. Choose this if you want a single package that includes tire, wheel, and stem in a DOT-approved build.
Caution: Ensure the center bore and bolt pattern match your trailer hub for proper alignment and safety.
GADFISH Spare Tire Carrier
This heavy-duty spare tire carrier is designed to fit 4, 5, and 6 lug trailer wheels with bolt patterns ranging from 4″ to 5.5″. It supports up to 150 lbs and features a reinforced triangular structure plus a robust behind plate to keep the tire secure. Best for universal boat-trailer setups needing a sturdy, multi-pattern carrier.
Better for trailers that require wide compatibility across common lug patterns. This can simplify spare tire mounting when upgrading or adjusting to different trailer configurations.
Caution: The carrier weight and fitment should be checked against your specific axle and mounting area to ensure clearance and bolt compatibility.
eCustomrim 2-Pack Trailer Tire Rim Assembly ST175/80D13
This pair of bias-ply trailer tires provides 1360 lbs maximum load and 50 psi, with a 24.4-inch overall diameter and Load Range C. The 13×4.5 inch rim with a 3.19″ center bore and 5-lug pattern ensures secure lug alignment. DOT-approved assembly includes tire, wheel, and valve stem, with a two-year warranty and roadside assistance. Best for budget-conscious buyers needing two ready-to-install assemblies for boat trailers with smaller wheels.
Choose this if you want a cost-effective, DOT-approved dual-pack that is easy to deploy for spare or replacement needs.
Caution: The 13-inch rim size may not fit larger hubs or certain boat-trailer configurations; verify hub bore and pattern first.
eCustomrim Single Trailer Tire Rim Assembly ST175/80D13
This single assembly mirrors the two-pack option with bias-ply design, 1360 lbs max load, 50 psi, 24.4″ overall diameter, and Load Range C. It uses a 13×4.5 inch rim with a 3.19″ center bore and 5 lug on 4.5″ pattern. It is DOT-approved and includes roadside assistance for a two-year period. Best for replacement needs or upgrading a single trailer wheel with a reliable, ready-to-install setup.
Better for replacing a worn wheel or matching an existing spare with a familiar 13-inch rim and pattern. Avoid this if your trailer uses a larger wheel or different lug pattern.
eCustomrim Trailer Tire Rim Assembly ST205/75D14
This assembly features bias-ply tires rated for 1760 lbs max load at 50 psi, with a 26.5-inch overall diameter and Load Range C. The 14×5.5 inch rim uses a 3.19″ center bore and a 5-lug pattern. DOT-approved and shipped with roadside assistance for two years. Best for boat trailers that need higher load capacity and a larger 14-inch rim for stable towing and wheel alignment.
Choose this if you require stronger wheels for heavier loads or longer, more demanding towing journeys. Avoid if your trailer uses a smaller hub or different bolt circle.
eCustomrim Trailer Tire Rim Assembly ST175/80D13
This 13-inch bias-ply assembly is rated for 1100 lbs max load at 35 psi, with a 24.4″ overall diameter and Load Range B. It uses a 13×4.5 inch rim and a 5 lug pattern on 4.5″ center, ensuring secure lug alignment. DOT-approved assembly includes tire, wheel, and valve stem, plus a two-year warranty with roadside assistance. Best for light-duty or smaller boat-trailer setups where a lower load option is sufficient.
Be mindful that the lower load rating may not suit heavier trailer configurations or frequent high-speed towing over rough roads.
Buying Guide
What should you consider when choosing a spare tire setup for a boat trailer?
- Load capacity: Match the tire’s max load to your boat and trailer weight plus cargo. Higher loads provide extra safety on long trips.
- Rim size and bolt pattern: Confirm the hub bore, lug count, and bolt circle (e.g., 5×4.5, 5×5.0) match your trailer.
- Assembly vs. carrier: Decide between a ready-to-install tire-and-wheel assembly or a carrier that lets you mount a standard tire. DOT approval matters for safety and roadside compliance.
- Durability and environment: For saltwater use, consider corrosion resistance and protective coatings on rims or carriers.
- Spare availability: If you tow in remote areas, a second assembly or a robust carrier can be essential for quick change-outs.
FAQ
- What is the advantage of a DOT-approved trailer tire assembly?
Answer: It ensures the tire, wheel, and stem meet safety standards and are ready for immediate use without additional components. - Which tire size is best for a medium boat trailer?
Answer: A 13″ or 14″ tire with Load Range C or D is common for mid-size trailers, balancing load and clearance. - Can I use a spare carrier for different lug patterns?
Answer: A multi-pattern carrier like the GADFISH model is designed for common 4–6 lug configurations, but always verify bolt pattern and clearance. - Do I need roadside assistance with a trailer tire assembly?
Answer: Many assemblies include roadside assistance as part of the warranty, which can help during a tire change on the road. - How do I verify hub compatibility before buying?
Answer: Check center bore size, rim width, and bolt pattern (lug count and circle) against your trailer’s hub specifications. - Are bias-ply tires still suitable for boat trailers?
Answer: Yes, bias-ply tires like ST175/80D13 and ST205/75D14 are common and reliable for lighter to medium loads; however, some trailers may perform better with radial tires depending on speed and wear.