Whether you’re prepping for seasonal trips or replacing a missing tire on a dockside launch, the right boat trailer spare wheel setup improves safety and reliability. This guide highlights five dependable options, covering tire-and-rim assemblies, heavy-duty mounts, and versatile carriers. The picks are best for boat trailers of various lug patterns, wheel sizes, and load needs. Read on to find the right spare wheel and carrier for your trailer, whether you value quick installation, rust resistance, or universal fitment for multiple setups.
| Product | Best For | Key Benefit |
|---|---|---|
| eCustomrim ST175/80D13 & 13″ Rim Assembly | Small to mid-sized trailers with 5-lug 4.5″ pattern | DOT-approved, warranty with roadside assistance |
| GADFISH Spare Tire Carrier | Heavy-duty mounting for larger boats | Up to 150 lbs, wide bolt-pattern compatibility |
| eCustomrim ST205/75R14 Assembly | Mid-size trailers needing D-rated tire | DOT-approved, six-year warranty |
| WANDA 4.80-12 Wheel Assembly | Light-to-medium trailers needing 5-lug 4.5″ pattern | High-speed rating and durable white spoke look |
| VOISEN Spare Tire Carrier | Universal bolt patterns for boats and RVs | Up to 150 lbs, robust rust-resistant finish |
eCustomrim Trailer Tire Rim Assembly ST175/80D13
The ST175/80D13 tire and 13×4.5 inch rim are designed for light trailer setups with a 5-lug bolt pattern. It uses a bias ply trailer tire rated for 1360 lbs and 50 PSI, delivering reliable towing performance for smaller boats or utility trailers. This assembly is DOT-approved and comes with a two-year warranty plus roadside assistance, making it a strong option for owners who prioritize safety and straightforward serviceability. Best for smaller, budget-conscious trailers that still require a ready-to-use unit.
Best for: small to midsize trailers needing a compact, ready-to-roll setup with a standard 5-lug pattern. Choose this if you want a complete, DOT-approved package that includes mounting hardware and roadside backup.
Caution: Not ideal for high-load or oversized trailers; ensure your axle fits a 13″ rim and 4.5″ center-bore configuration.
GADFISH Spare Tire Carrier
This spare tire carrier clamps onto a trailer to hold up to 150 lbs with a reinforced triangular welded structure and a sturdy behind plate. It supports 4- to 6-lug bolt patterns, including 4×4″, 5×4.5″/4.75″/5″, and 6×5.5″ configurations. The robust construction, industrial finish, and rust-resistant surface make it suitable for boats and heavier trailers. Best for: boat trailers that require a universal, heavy-duty mount with a stable, long-lasting hold.
Better for: trailers needing broad bolt-pattern compatibility without changing spares frequently.
Limitation: Some installations may require additional hardware depending on frame dimensions; verify fit with your trailer’s tongue and bolt pattern.
eCustomrim Radial Trailer Tire ST205/75R14
The ST205/75R14 assembly uses a radial bias appropriate for larger trailers, offering a 26.1 inch overall diameter and a Load Range D rating. It features a 14 inch rim with a 5-lug pattern, a 3.19 inch center bore, and DOT-approved components with a six-year warranty plus free roadside assistance. Best for: mid-to-large trailers needing stronger radial construction and longer warranty coverage. Better for: towing stability on longer trips and uneven surfaces.
Limitation: A larger tire and rim may require more space on the trailer tongue and could affect clearance on tight docking areas.
WANDA Trailer Tire Wheel Assembly 4.80-12
The 4.80-12, 6-ply C-rated wheel is suitable for boat and motorcycle trailers needing a 5-lug 4.5″ bolt pattern. It carries a speed rating of M (up to 81 mph) and combines a white spoke look with durable construction. Best for: light-to-medium trailers that require a visually clean, ready-to-run wheel assembly. Better for: owners prioritizing highway performance within a modest load.
Limitation: Suitable load is lower than some heavy-duty carriers; confirm your trailer’s gross weight and cargo before choosing.
VOISEN Spare Tire Carrier
The VOISEN carrier offers universal compatibility for 4-, 5-, and 6-lug wheels across 4″ to 5.5″ bolt patterns, holding up to 150 lbs. A triangular reinforced frame and rust-resistant finish support long-term use on boats and utility trailers. Best for: owners needing a flexible fit for multiple wheel configurations. Choose this if you want a highly adaptable spare tire mount. Limitation: Some installations may require precise alignment to prevent tire wobble on rough roads.
toolhoper Trailer Spare Tire Mount
The toolhoper mount features an upgraded 3-nut design to lock tires more securely and reduce vibration. Built from precision steel with powder-coated rust resistance, it supports up to 150 lbs. Its multi-layer bending design enhances strength and helps prevent tire loss on rough roads. Best for: trailers where minimizing tire detachment risk is the priority. Choose this if you require a sturdy, longer-term mount with strong locking capability.
Limitation: Installation may require drills and hardware tailored to your trailer frame; check mounting surface compatibility before purchase.
MaxxHaul 50214 Spare Tire Carrier
The MaxxHaul carrier supports 4-lug and 5-lug wheels and mounts on trailer tongues up to 3 inches wide. Its angled and raised design helps accommodate boat trailers. Best for: trailers with narrow tongues seeking a simple, reliable mounting solution. Avoid this if your tongue is wider or if you require mounting on a vertical surface rather than the tongue.
FIERYRED Trailer Spare Tire Mount
This 120 lbs-capacity spare tire carrier fits 4- and 5-lug wheels with bolt patterns of 3.94″, 4″, 4.25″, and 4.72″. Forged iron construction with powder coating provides rust resistance, and mounting hardware is included for straightforward bolt-on installation. Best for: budget-conscious buyers needing a robust, corrosion-resistant tow-ready spare hub. Limitation: Slightly heavier than aluminum competitors; ensure trailer mounting area can support the weight over time.
Buying Guide: Key Purchase Considerations
- Trailer compatibility: Check lug pattern, center bore, tire size, and rim diameter to match your current setup.
- Load capacity: Match carrier or mount weight rating to your trailer gross weight and tire load ratings. Consider extra margin for rough roads and wind resistance.
- Corrosion resistance: For saltwater use, prioritize powder-coated steel or aluminum with rust protection.
- Installation effort: Some mounts require drilling or frame modification. Prefer bolt-on options if you want a tool-free upgrade.
- Warranty and service: DOT-approved assemblies and long warranties provide confidence in safety and roadside support.
- Flexibility: If you tow different trailers, a universal or multi-lug carrier can save future purchases.
Frequently Asked Questions
- What wheel size should I choose for a boat trailer spare?
– Choose wheel size that matches your current tire and rim combination to preserve alignment and handling characteristics. - Do I need a DOT-approved spare tire assembly?
– DOT approval ensures the assembly conforms to safety standards and can simplify roadside assistance considerations. - Can I mix tire brands with a spare carrier?
– It’s best to keep matching or compatible tires and rims to maintain balance and performance. - How much weight should a spare tire mount hold?
– Select mounts rated for at least the tire’s weight plus a safety margin to accommodate rough driving conditions. - Are universal carriers robust for saltwater boats?
– Look for corrosion-resistant finishes and reinforced structures designed for marine environments. - Is professional installation recommended?
– For bolt-on mounts, a basic installation may suffice; for welded or custom-fit mounts, professional installation is advised.