Finding reliable spare tire options and mounts for jet ski trailers is essential for safe, worry-free adventures on the water. This guide highlights five top picks, covering tire-and-wheel assemblies, heavy-duty mounting brackets, and weatherproof covers designed to fit common trailer configurations. Each product is evaluated by durability, compatibility, and practical installation considerations to help you choose the best spare tire setup for jet ski trailers.
| Product | Brand | Key Feature |
|---|---|---|
| Trailer Tire On Black Wheel Modular Rim ST205/75D15 | eCustomRim | Load Range C, 5 Lug On 4.5 Center, DOT Approved, 2-Year Warranty |
| Spare Tire Carrier for Boat Trailer | GADFISH | Up to 150 Lbs, 4–6 lug compatibility, robust welded design |
| Spare Tire Mount Bracket for Trailer | AUTODUNK | Fits 4–5 lug wheels, 120 Lbs, easy bolt-on installation |
| Spare Tire Covers for Trailers Jet Ski | itinspace | Weatherproof, dustproof, universal fit, drawstring closure |
| Spare Tire Carrier Holder for Utility/Boat Trailer | TNCZHYLX | Up to 150 Lbs, supports 4–6 lug wheels, durable iron construction |
eCustomrim Trailer Tire On Black Wheel Modular Rim ST205/75D15

The eCustomrim ST205/75D15 tire-on-wheel assembly combines a 5-lug bolt pattern with a 15-inch rim. It is rated to 1820 lbs maximum load and 50 PSI, with an overall diameter of 27.2 inches. The package uses a 15X5 rim, center bore 3.19, and includes DOT-approved tire and wheel components with a two-year warranty and roadside assistance.
GADFISH Spare Tire Carrier for Trailer

GADFISH offers a heavy-duty spare tire carrier with up to 150 lbs capacity. It accommodates 4, 5, and 6 lug patterns across 4″ to 5.5″ bolt patterns, making it suitable for various boat and trailer applications. The triangular welded structure and reinforced steel backing ensure secure mounting, while the durable coating provides rust resistance for marine environments.
AUTODUNK Spare Tire Mount Bracket for Trailer

AUTODUNK provides a versatile spare tire carrier designed for trailer tongues up to 2.95 inches wide. It supports 4- and 5-lug wheels with bolt patterns from 3.94 to 4.72 inches and holds up to 120 lbs. The unit features galvanization for rust resistance and easy, drill-free bolt-on installation with included instructions.
Spare Tire Covers for Trailers Jet Ski

itinspace spare tire covers provide weatherproof protection for trailers, RVs, and jet skis. Made from outdoor Oxford fabric, they resist sun, dust, and scratches while offering a drawstring closure for secure fitting. The design is universally compatible with 13-inch wheels and adds a touch of personality with HD graphic designs, suitable for frequent travelers and watercraft owners.
Spare Tire Mount, Universal Carrier Holder

This universal spare tire carrier from TNCZHYLX is built for heavy use, supporting up to 150 lbs. It fits 4–6 lug wheels across 4″, 4.5″, 4.75″, 5″ and 5.5″ bolt patterns. Constructed from durable iron with a rust-resistant finish, it is designed to ensure secure tire mounting on trailers, boats, and campers with a straightforward bolt-on installation.
Buying Guide: Key Purchase Considerations for Jet Ski Trailer Spares
- Trailer compatibility: Confirm lug patterns (4, 5, 6 lugs) and bolt circle diameters match your trailer wheels. Look for adjustable or universal designs when there are multiple possible configurations.
- Weight rating: Choose carriers and tire assemblies rated to exceed the loaded weight of your jet ski and trailer to ensure safe handling on highways and ramps.
- Material and finish: For marine use, prioritize galvanized or powder-coated steel to resist rust from saltwater exposure and humid climates.
- Installation approach: Bolt-on installations are common; consider models that require no drilling and include clear instructions for ease of setup.
- Protection and longevity: Weatherproof covers protect tires from sun and grime, while tire-and-wheel assemblies should be DOT approved and come with warranties or roadside assistance for peace of mind.
- Storage and accessibility: Positionments that keep the spare out of the way but easily reachable can reduce time on the ramp during a tire change.
- Availability of add-ons: Verify if your choice includes or pairs well with a tire-and-wheel assembly, mounting brackets, or covers, to minimize additional purchases.
- Maintenance needs: Regular inspection for rust, loose bolts, and tire tread wear helps maintain safety and performance over time.