Top 6 Spare Tire Cover Boat Trailer Picks for Every Need (2026)

Updated November 2026

A spare tire cover boat trailer setup protects the spare from UV damage, road grime, standing water and the cracking that comes from sitting in the sun for months. Trailer spares often ride under the frame or on a rear mount, where they collect dirt and moisture between launches. This guide compares six covers using the criteria that matter most for a trailer: the correct wheel diameter, a secure elastic hem, UV and water resistance, and a fit that will not flap or scuff paint when you are on the road. Specifications below come from manufacturer listings and common owner feedback patterns, not from our own testing.

Our Top Picks

Quick Comparison

Product	Best for	Key feature
Moonet PVC Leather Spare Tire Wheel Cover	General trailer spares, 24–26 inch diameter	Elasticized back hem and non-scratch backing
Spare Tire Cover for RV Trailer with American USA Flag	Owners who want a patriotic look	Waterproof leather-style surface with a USA flag design
Spare Tire Cover Fit for Your SUV, Jeep, RV, Trailer	Mid-size spares, 23.62–27.16 inch diameter	Dust-proof PVC leather construction
Spare Tire Cover for 13 Inch Wheels	Small trailer wheels in 13-inch sizes	UV-resistant black PVC with listed 13-inch tire fitments
WSSROGY 15 Inch Thickening Spare Tire Cover	Larger spares, 27–29 inch diameter	Thickened PU leather for added durability
Foruidea Bones Fish Spare Tire Cover	Budget-minded owners with a 14-inch spare	Dust-proof cover with a fish-bone graphic

Moonet PVC Leather Spare Tire Wheel Cover

Best for: General-purpose trailer spares in the 24–26 inch diameter range. We also found 7 Best Boat Winch Straps with Safety Hook for Trailers (2026) useful on this point.

This cover suits boat owners whose trailer spare falls in the 24 to 26 inch range and who want a plain, dark look that blends with most trailers. It is listed for car, truck, SUV, camper and trailer use.

Key specs

• Fits 24–26 inch diameter spares
• PVC leather material
• Elasticized back hem for a snug install
• Non-scratch backing
• Listed protection against sun, rain and dirt

Pros

• Elastic hem holds the cover in place on a spare mount
• Non-scratch backing reduces wear on painted surfaces
• Broad vehicle compatibility listed

Cons

• Sizing is narrow, so measure your spare before buying
• PVC can stiffen in cold weather, making installation harder

Bottom line: A solid default choice for owners with a 24 to 26 inch trailer spare who want a simple, secure fit.

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WSSROGY 15 Inch Thickening Spare Tire Cover

Best for: Larger spares in the 27–29 inch diameter range.

Owners with bigger spare tires, often on heavier trailers or larger boats, will find this cover built for a wider diameter than most standard options. The thickened PU leather is aimed at owners who want more body and less flapping at highway speeds.

Key specs

• Fits 27–29 inch diameter spares
• Thickened PU leather construction
• Listed as waterproof and dustproof
• American USA flag design

Pros

• Thicker material resists creasing better than thin covers
• Wide diameter range suits larger trailer spares
• Waterproof and dustproof construction listed

Cons

• Heavier than thinner covers, which can make removal tiring
• Large diameter means it must be measured carefully to avoid gaps

Bottom line: The right pick if your spare measures in the upper range and you want heavier-gauge material.

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Spare Tire Cover for RV Trailer, Waterproof Leather Wheel Cover with American USA Flag

Best for: Owners who want a patriotic look on a trailer spare.

This cover is a good match for boat owners who tow with an RV-style rig and want the spare to show some personality. It is listed for Jeep Wrangler, RV, SUV, truck and travel trailer use.

Key specs

• Listed for 14-inch spares
• Waterproof leather-style surface
• American USA flag graphic

Pros

• Distinctive flag design stands out on a trailer
• Waterproof surface listed for rain protection
• Broad vehicle compatibility

Cons

• Graphic may fade over long sun exposure, a common owner concern with printed covers
• Confirm the 14-inch sizing against your actual tire diameter

Bottom line: Best for owners who want a bold, flag-themed cover on a 14-inch spare.

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Spare Tire Cover for 13 Inch Wheels, Waterproof PVC, Black, RV Trailer

Best for: Trailers that run 13-inch wheels.

Small trailers and utility boat trailers often use 13-inch wheels, and this black PVC cover is sized for that. It lists specific tire fitments, which helps owners confirm compatibility before buying.

Key specs

• Fits 13-inch wheels
• Listed tire sizes: 155/80R13, 165/70R13, 175/80R13, 185/70R13
• Waterproof PVC
• UV-resistant listing
• Elastic hem

Pros

• Lists exact tire fitments for easy matching
• Black finish suits most trailer frames
• UV resistance listed for sun protection

Cons

• Only useful for 13-inch spares
• Black surfaces can run warm in direct sun

Bottom line: The clear choice for owners whose trailer spare is a 13-inch wheel.

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Spare Tire Cover Fit for Your SUV, Jeep, RV, Trailer, Truck, Waterproof Dust-Proof PVC Leather Tire Covers

Best for: Mid-size spares in the 23.62 to 27.16 inch diameter range.

This is a practical middle-range option for owners whose spare falls between the smaller and larger sizes. The dust-proof PVC leather construction is aimed at keeping grime off the tire surface during long storage.

Key specs

• Listed for 14-inch spare configurations
• Fits diameters 23.62–27.16 inches
• Waterproof and dust-proof PVC leather

Pros

• Wide diameter range covers many trailer spares
• Dust-proof design suits long storage periods
• Works across SUV, RV and trailer applications

Cons

• The listing mixes a 14-inch label with a wider diameter range, so measure carefully
• Thinner than premium leather-style covers

Bottom line: A versatile choice for mid-size spares when you want broad fitment.

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Foruidea Bones Fish Spare Tire Cover Dust-Proof Wheel Tire Cover Fit Trailer, RV, SUV and Many Vehicle 14 Inch

Best for: Budget-minded owners with a 14-inch spare.

This cover suits boat owners who want a simple, low-cost way to keep dust and UV off a 14-inch spare, and who do not need premium leather finishes. The fish-bone graphic is a playful option for fishing boat owners.

Key specs

• Listed for 14-inch spares
• Dust-proof wheel cover
• Fish-bone graphic design

Pros

• Budget-friendly option for basic protection
• Fish graphic suits fishing-focused boat owners
• Simple to put on and take off

Cons

• Material is less substantial than premium leather-style covers
• Limited detail on water resistance compared with waterproof-labeled options

Bottom line: A sensible pick for a 14-inch trailer spare when budget comes first and dust protection is the main goal.

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Buying Guide

Measure your spare tire diameter

Measure the overall diameter of the tire, not the wheel rim. Lay a tape measure across the center of the tire from one outer edge to the other, then check the sidewall for the tire size code. Covers are sized by diameter, so a cover built for 24 to 26 inches will not fit a 28-inch spare. Leave a small margin, but avoid covers that are much larger than the tire, since loose material flaps and wears faster.

Good picks for this: Moonet PVC Leather Spare Tire Wheel Cover, WSSROGY 15 Inch Thickening Spare Tire Cover

Check the wheel size

Trailer spares commonly come in 13-inch, 14-inch and 15-inch wheel sizes, and some listings name the wheel size directly. Confirm the wheel size printed on the rim or the tire sidewall before comparing covers. A cover labeled for 13-inch wheels is the right match only when your spare is actually a 13-inch wheel.

Good picks for this: Spare Tire Cover for 13 Inch Wheels, Foruidea Bones Fish Spare Tire Cover

Look for an elastic hem

An elasticized back hem is what holds the cover snug on the tire. Without a good hem, the cover can work loose on rough roads and expose the tire. Stretch the hem by hand before buying if you can, and look for a listing that mentions an elastic or drawstring edge.

Good picks for this: Moonet PVC Leather Spare Tire Wheel Cover, Spare Tire Cover for 13 Inch Wheels

Consider waterproof and UV-resistant material

Material determines how well the cover handles sun and rain. PVC and PU leather-style materials are common for spare covers because they shed water and resist cracking better than thin fabric. Dark covers absorb more heat, so if you store the trailer in direct sun for long periods, weigh that against the protection you want.

Good picks for this: WSSROGY 15 Inch Thickening Spare Tire Cover, Spare Tire Cover for 13 Inch Wheels

Choose a design that stays put

A cover that flaps while you tow can scuff paint and wear through. Covers with a non-scratch backing reduce paint contact, and a snug hem keeps the cover in position at speed. If your spare sits on a rear or side mount, check that the cover does not rub against the mount hardware.

Good picks for this: Moonet PVC Leather Spare Tire Wheel Cover, Spare Tire Cover Fit for Your SUV, Jeep, RV, Trailer

Match the cover to how you store the trailer

If the trailer sits outdoors all season, prioritize UV and water resistance. If it lives under a shed or in a garage, a dust-proof cover may be enough. Owners who store trailers near salt water should rinse covers regularly to keep grit from working into the material.

Good picks for this: Spare Tire Cover for RV Trailer with American USA Flag, Foruidea Bones Fish Spare Tire Cover

Plan for care and replacement

Rinse the cover with mild soap and water, let it dry fully, and avoid harsh solvents that can damage PVC or PU surfaces. Inspect the hem and seams once a season. Replace the cover when the material cracks, the elastic loses its hold, or the graphic fades to the point of hiding the surface. Manufacturers generally recommend gentle cleaning, so follow the care label on your specific product.

Good picks for this: Spare Tire Cover Fit for Your SUV, Jeep, RV, Trailer, Foruidea Bones Fish Spare Tire Cover

FAQ

Do I need a spare tire cover on a boat trailer?

A cover is not required, but it helps. Covers keep UV light, dirt and standing water off the tire surface, which can slow cracking and surface wear on a spare that sits for long periods. Covers are most useful on trailers stored outdoors.

How do I know what size spare tire cover to buy?

Measure the overall tire diameter and match it to the diameter range in the listing. Use the tire sidewall code as a cross-check. If the listing names a wheel size such as 13, 14 or 15 inches, confirm it matches your spare.

Will a spare tire cover fit a 13-inch wheel?

Only if the cover is labeled for 13-inch wheels or lists your exact tire size. The Spare Tire Cover for 13 Inch Wheels listed in this guide includes specific fitments for that purpose.

Are spare tire covers waterproof?

Many are labeled as waterproof or water-resistant, typically made from PVC or PU leather-style materials. Waterproof labeling describes the material, but seams and hems can still let moisture in over time, so inspect them regularly.

Can a spare tire cover scratch paint?

It can if the cover flaps against painted surfaces. Choose a cover with a non-scratch backing and a snug elastic hem, and check that it does not rub against the trailer frame or mounting hardware.

How do I clean a spare tire cover?

Use mild soap and water, rinse well, and let the cover dry completely before storing it. Avoid harsh solvents. Follow the specific care instructions printed on the product packaging.

How often should I replace a spare tire cover?

Replace it when the material cracks, the hem no longer holds the cover in place, or the surface is worn enough to expose the tire. Service life depends on sun exposure and how often the trailer is used.

Conclusion

For most trailer owners, the Moonet PVC Leather Spare Tire Wheel Cover is a reasonable starting point, provided the spare falls in its 24 to 26 inch range. Owners with larger spares should look at the WSSROGY 15 Inch Thickening Spare Tire Cover, while those with 13-inch wheels will find the dedicated 13-inch option the most straightforward fit. The flag-themed RV cover suits owners who want style, and the Foruidea Bones Fish cover fits a budget-focused approach for 14-inch spares. Measure your spare before ordering, since fit matters more than any other feature.

For more on protecting boat gear from the elements, see Waterproof Boat Cover Material: Which Fabric Keeps Water Out Best? and Pontoon Boat Cover While Docked: How to Choose and Fit One (7 Steps). If you are comparing trailer-related covers, Why Is My Boat Trailer Hub Cover Leaking? 6 Causes and Fixes covers a related problem.

Sources

• Tire safety basics, including inspection and care of spare tires (nhtsa.gov)
• Background on UV exposure and environmental wear on materials (usgs.gov)
• Guidance on trailer and boat equipment inspection and safe towing practices (uscg.mil)

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