Stromberg Carlson TR-1 Rigid Spare Tire Carrier for 4" Square Bumpers — Fits 15" & 16" Wheels, Heavy-Duty Black

The Stromberg Carlson TR-1 is a heavy-duty, rigid spare tire carrier that mounts to 4" square trailer bumpers and securely holds 15" and 16" wheels.

Designed for trailers, RVs and utility rigs that need a dependable, out-of-the-way spare storage solution, the TR-1 combines thick welded-steel construction with a simple, secure mounting system. It’s built to resist loosening on the road, ships with all required hardware, and installs quickly on standard 4" square bumper tubing so you can carry a spare without sacrificing space on your trailer.

How solid is the TR-1 when driving on bumpy roads?

The TR-1 is built from extra-thick welded steel and uses a double-nut retention design to resist vibration and loosening. That combination minimizes wobble and keeps the spare firmly mounted across rough surfaces.

• Welded-steel frame for high structural strength
• Double-nut fastening to prevent backing off
• Designed for trailer road conditions and vibration

Will this carrier fit my trailer and spare tire size?

This mount is purpose-built for trailers with 4" square bumpers and accepts common 15" and 16" travel trailer wheels. It offers a universal fit for most aftermarket and factory trailer tires within those diameters.

• Fits standard 4" square bumper tubing
• Compatible with 15" and 16" wheels used on travel trailers
• Mounting hardware included for straightforward installation

How easy is installation and what hardware is included?

Installation is straightforward and requires no special tools beyond common wrenches. The TR-1 ships with the bolts, nuts and washers you need plus simple instructions so you can attach it quickly to a 4" bumper.

• All mounting hardware included in the package
• Clear, easy-to-follow instructions supplied
• Typical installation completed by one person in minimal time

How does the TR-1 protect the spare and trailer finish?

The unit’s durable finish resists corrosion and road wear, while the rigid design keeps the tire from contacting the trailer body or hitch components. Properly mounted, it prevents rubbing and minimizes movement that could damage paint or adjacent gear.

• Durable black finish to resist rust and weathering
• Rigid mount reduces tire-to-trailer contact
• Secures the spare away from vulnerable trailer areas

Who this is for: The Stromberg Carlson TR-1 is ideal for trailer owners who need a heavy-duty, no-fuss spare tire solution—campers, utility trailer users, landscapers and anyone towing with a 4" square bumper. If you want a simple, strong carrier that fits 15"–16" wheels, includes necessary hardware, and installs quickly, the TR-1 is a practical choice.