Best Boat Trailer Spare Wheel Options for Safe Towing
When selecting a boat trailer spare wheel, choose assemblies that combine a sturdy tire with a compatible rim and reliable mounting. This guide highlights five solid picks designed for different trailer setups, helping you pick the right spare for reliability on the water and back on the road. The buyers these products suit best include boaters who tow varied distances, weekend campers who need extra resilience, and users seeking quick, safe roadside replacements.
| Product | Key Trait | Best For |
|---|---|---|
| eCustomrim Single Trailer Tire Rim Assembly ST175/80D13 | Bias ply, 1360 lb load, 50 PSI | Low-profile, light trailers with 5-lug rims |
| GADFISH Spare Tire Carrier | Heavy-duty mount, up to 150 lbs | Universal bolt patterns for 4–6 lug wheels |
| eCustomrim Radial Trailer Tire ST205/75R14 | Load D, 2040 lb, 65 PSI | Higher-capacity trailer setups |
| Free Country Trailer Tire Wheel Assembly ST225/75R15 | 7 mm tread, nylon cap ply, scuff guard | Durable, long-mileage spare for larger trailers |
| VOISEN Spare Tire Carrier | Universal 4–6 lug compatibility, up to 150 lbs | Boat trailers needing flexible bolt patterns |
eCustomrim Single Trailer Tire Rim Assembly ST175/80D13
The assembly combines a bias-ply trailer tire rated for up to 1360 lbs with a 50 PSI maximum, and a 24.4″ overall diameter. It uses a 13×4.5″ rim with 5 lug holes on a 4.5″ bolt pattern and a 3.19″ center bore. This DOT-approved tire, wheel, and valve stem package is designed for reliable towing performance and easy installation. Best for smaller boats or utility trailers that require a lightweight, ready-to-install spare.
Best for: trailers with 5-lug, 4.5″ bolt patterns seeking a simple, DOT-approved spare. Limitations: bias-ply tires can wear more quickly than some radials on long highway trips.
GADFISH Spare Tire Carrier
This heavy-duty spare tire mount supports up to 150 lbs with an upgraded triangular weld structure and a sturdy behind plate for secure alignment. It is designed for multiple lug configurations, supporting 4-, 5-, and 6-lug wheels with 4″, 4.5″, 4.75″, 5″, and 5.5″ bolt patterns. Best for boat trailers needing broad compatibility and a robust, rust-resistant mounting solution. Caution: ensure proper torque on mounting bolts to prevent loosening over rough terrain.
Best for: universal compatibility across common boat trailer patterns. Choose this if you want a single mount that fits several wheel options. Better for: trailers that require quick swaps between different spare wheel configurations.
eCustomrim Radial Trailer Tire ST205/75R14
This radial tire assembly delivers a load rating of 2040 lbs with a maximum 65 PSI. The 26.1″ overall diameter and 14″ rim in a 5-lug configuration (4.5″ center) provide a higher-capacity spare for mid-sized trailers. DOT-approved along with a full six-year warranty and roadside assistance included. Best for: trailers that prioritise durability and longer service life on mixed road surfaces. Caution: radial tires may present different handling characteristics than bias-ply options on uneven surfaces.
Free Country Trailer Tire Wheel Assembly ST225/75R15
This assembly features a 7 mm tread depth and a unique Scuff Guard ring to protect sidewalls and rims. The 225/75R15 size implies 15″ rims with 6-lug patterns, while the tire’s nylon cap ply overlay enhances longevity. Best for larger trailers that see frequent road use and require higher mileage. Limitation: tread depth may wear faster in extreme heat or rough terrain compared with premium radial options.
Spare Tire Mount, Universal Carrier (Black)
This universal spare tire carrier supports 4, 5, and 6 lug wheels with a range of bolt patterns (4″ to 5.5″). It is built from industrial-grade solid iron with a sandblasted finish for rust resistance and an angled, raised mounting design to keep tires stable on rough roads. Best for: boat trailers needing flexible and durable mounting that can survive off-road or rough-launch conditions. Caution: verify compatibility with your trailer’s frame before installation.
Buying Guide
What size spare wheel should I choose?
Match the spare size to your trailer’s current tires in terms of diameter, width, and load range. Using a mismatched size can affect towing stability and wheel alignment.
How do I know the right bolt pattern?
Check your trailer’s wheel hub and current rims for bolt pattern (e.g., 5- lug on 4.5″ center). Choose a carrier or rim that aligns with your hub’s bolt count and spacing.
What about load rating and tire type?
Radial tires generally offer longer tread life and better heat tolerance for highway towing, while bias-ply tires can be lighter for smaller trailers. Ensure the spare’s load rating matches or exceeds your trailer’s weight to avoid overloading the wheel assembly.
Is mounting hardware included?
Many assemblies come with DOT-approved tire, wheel, and valve stem but check if mounting hardware is included. A sturdy carrier with secure mounting reduces the risk of tire loss during travel.
What maintenance matters most?
Inspect the spare, carrier, and mounting hardware for corrosion, rust, or loose bolts. Regular checks help prevent failures in remote locations.
FAQ
- Q: Do these spares fit all trailer types?
- A: They cover common patterns (4–6 lug) and sizes; verify your hub and bolt pattern before purchasing.
- Q: Can I mix bias ply and radial tires on a trailer?
- A: It’s best to use matching tires on a trailer to maintain consistent handling and load distribution.
- Q: Do these include roadside assistance?
- A: Some configurations include roadside assistance as part of the package; check product details for each item.
- Q: How do I choose between a tire-only assembly and a carrier?
- A: If you already have a well-matched spare wheel, a carrier simplifies mounting and keeps the tire secure on rough roads.