Finding a reliable U-bolt spare tire carrier for trailers is essential for quick tire changes on the road and in rough conditions. This guide reviews five popular U-bolt spare tire mounts designed for side-mount applications on ski boats, fishing boats, and sailboats. Each product supports 4- or 5-lug wheels and tires up to 15 inches, with galvanized steel to resist rust and weather. Read on to compare installation, materials, and compatibility to help you choose the right carrier for your trailer.
| Product | Fit | Material | Mount Style | Notes |
|---|---|---|---|---|
| U-Bolt Spare Tire Carrier Holder | 2″ or 3″ wide frames; up to 15″ tires | 8.8 grade steel; galvanized | Side mount | For 4 or 5 lug wheels |
| Spare Tire Carrier for Trailer | 2″ or 3-4/5″ wide frames | Sturdy rust-proof steel; galvanized | Side mount | 4 or 5 lug wheels |
| U-Bolt Trailer Spare Tire Bracket | 2″ or 3″ wide frames | 8.8 grade thick steel; galvanized | Side mount | 4 or 5 lug wheels |
| Trailer Spare Tire Mount Bracket | 2″ or 3″ wide frames | Thick steel with galvanized finish | Side mount | 4 or 5 lug wheels |
| Trailer Spare Tire Mount | 2″ or 3-4/5″ wide frames | Heavy-duty steel; zinc-coated | Side mount | 4 or 5 lug wheels |
U-Bolt Spare Tire Carrier Holder Bracket

This U-bolt tire carrier is designed for trailer frames up to 2″ or 3″ wide (up to 4″ high) and supports tires up to 15″. It accommodates 4- or 5-lug wheels with bolt styles around 4 to 4-1/2 inches. Made from 8.8 grade thick steel, the bracket offers strength to bear heavy tires and resist deformation. The galvanized surface adds corrosion resistance, making it suitable for boat trailers exposed to salt air and rain. Installation is straightforward: slide the bolts into the trailer throat and tighten, securing the spare on the trailer’s side protector.
Key advantages include robust construction and weather-ready coating, which minimizes maintenance while ensuring the tire stays in a ready-to-use position. The side-mount design helps reduce interference with trailer beams and can simplify access when changing a tire on the water or at a park launch. This model suits common 15″ tires and provides a dependable solution for anglers and sailors alike.
Spare Tire Carrier for Trailer

The Liamoy spare tire carrier is built to fit trailer frames up to 2″ or 3-4/5″ wide and tires up to 15″ in diameter. It supports 4- or 5-lug wheels (4 to 4 or 5 to 4-1/2 bolt patterns). The unit uses sturdy, rust-proof steel with galvanizing that protects it against harsh weather. Fans of easy assembly will appreciate the simple mounting process—place the bolts into the trailer throat and tighten to secure the tire on the trailer side. This design minimizes production complexity while providing reliable performance in marine environments.
Customers should note the importance of verifying frame width and lug pattern compatibility before purchasing. The product’s corrosion resistance is a key benefit for watercraft owners, helping to extend the life of the carrier in salt-air conditions. The side-mount approach maintains a lean profile while keeping the spare tire within reach for quick changes during trips or maintenance.
U-Bolt Trailer Spare Tire Bracket

This galvanized, threaded spare tire mount is designed for 2″ or 3″ wide trailer frames with tires up to 15″ in diameter. It works well with 4- or 5-lug wheels, featuring bolt styles around 4 to 4-1/2 inches. The 8.8 grade thick steel provides durability, while the galvanized coating offers weatherproof protection for boating and coastal environments. The installation process is described as easy: secure the bolts in the trailer throat and tighten to mount the spare on the trailer’s side protector, with threading that facilitates mounting and adjustment.
As a feature set, the bracket emphasizes resilience and corrosion resistance, making it a practical pick for frequent travelers and watercraft enthusiasts. The side-mount configuration reduces overall trailer height and keeps the tire accessible without obstructing the trailer’s working area, which is beneficial during busy loading days or rough water conditions.
Trailer Spare Tire Mount Bracket

The lifgarfe spare tire mount is designed to fit trailer frames up to 2″ or 3″ wide, accommodating tires up to 15″ and 4- or 5-lug wheels (4 on 4 or 5 on 4-1/2). Its heavy-duty construction uses zinc-coated steel to resist corrosion and weathering, providing a durable solution for boats and utility trailers. The installation process is straightforward: place the bolts in the trailer throat and tighten, with a design that ensures the tire is mounted on the side of the trailer for easy access and reliable security against road vibrations.
This option emphasizes practical mounting and long-term durability, which can be important for trailers used in variable climates or with frequent use on rough roads. The zinc coating helps reduce maintenance needs and protect the cargo against the elements, aligning with the needs of boat owners who often navigate saltwater or coastal routes.
Trailer Spare Tire Mount

This versatile spare tire mount is built to fit trailer frames up to 2″ or 3-4/5″ wide and tires up to 15″ in diameter. It supports 4- or 5-lug wheels with bolt styles like 4 on 4 or 5 on 4-1/2. The unit is crafted from heavy-duty steel with a zinc coating to prevent rust and corrosion, making it well-suited for marine environments. Installation involves aligning bolts with the trailer frame and tightening to secure the tire on the trailer’s side, providing a stable, side-mounted solution designed to withstand on-road and off-road vibrations.
From a safety perspective, side-mount tires reduce protrusion and potential snag hazards during trailering. The metal thickness and protective coating contribute to longevity, while the simple mounting system offers quick tire changes when needed. This model balances strength, ease of use, and weather resistance for boat and utility trailers alike.
Buying Guide: Key Considerations For Choosing A U-Bolt Spare Tire Carrier
When selecting a trailer spare tire U-bolt carrier, consider frame width, wheel lug pattern, and tire size to ensure compatibility with your trailer. A galvanized or zinc-coated finish is crucial for longevity in marine or high-moisture environments. Look for thick steel construction to resist deformation under load, especially on rough roads or off-road conditions. A straightforward installation process helps with on-site maintenance and quick tire changes.
- Frame compatibility: Most carriers fit 2″ or 3″ wide frames; verify your trailer’s exact width and how the carrier positions the tire relative to the trailer body.
- Lug pattern support: Ensure the unit accommodates 4- or 5-lug wheels and matches your wheel bolt pattern (e.g., 4×4.5″ or similar).
- Tire size support: Check the maximum tire diameter; many units support up to 15″ tires, which is common for boat trailers.
- Material and finish: Prefer 8.8 grade steel or equivalent with galvanizing for corrosion resistance in salt environments.
- Installation effort: Consider whether you want a simple bolt-in setup or a more threaded, adjustable bracket for easy alignment.
Other perspectives include weight handling, mounting location on the trailer, and maintenance access. For deeper protection, assess whether the finish offers additional UV resistance or weatherproofing, especially if you store the trailer outside. Finally, verify that any mounting hardware matches your existing trailer hardware to avoid compatibility issues.