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

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

When you tow, a reliably mounted spare tire matters. The TR-1 rigid carrier is built from extra-thick welded steel, ships with the hardware you need, and uses a double-nut fastener system to resist loosening under vibration. It’s a straightforward solution for storing a full-size trailer spare outside the trailer body while keeping wheel access and ground clearance in mind.

How does this carrier attach to my trailer?

The TR-1 is engineered for direct attachment to a 4" square trailer bumper using the included fasteners and clear installation steps. Its rigid plate and bracket design align with common bumper openings so the mount sits flush and secure.

• Fits standard 4" square bumpers without extra adapters
• All necessary mounting bolts, washers, and nuts included
• Double-nut locking design reduces the chance of loosening
• Simple bolt-through installation—no welding required

Will the TR-1 hold my tire size and weight?

The carrier is sized to accept most 15" and 16" trailer tires and is fabricated from thick welded steel to withstand road stresses. It’s designed to carry a standard full-size trailer spare safely when mounted and torqued per the instructions.

• Compatible with 15" and 16" wheel diameters commonly used on travel trailers
• Heavy-duty steel construction handles typical trailer spare weights
• Rigid mounting minimizes sway or movement while towing
• Durable black finish resists corrosion and blends with trailer hardware

How does the TR-1 stay secure during travel?

The mount uses a sturdy plate and bracket assembly plus a double-nut fastening method that prevents nuts from working loose under vibration. When installed and tightened to the recommended torque, the carrier keeps the spare tire stable on rough roads and at highway speeds.

• Double-nut design locks hardware in place against vibration
• Welded steel construction reduces flex and maintains alignment
• Hardware included to ensure correct fastener selection and fit
• Low-profile mounting keeps the tire close to the bumper for balance

What comes in the box and how easy is assembly?

Stromberg Carlson includes the TR-1 carrier plus the complete set of mounting hardware and instructions so you can install it with common hand tools. Typical assembly and mounting take minimal time for anyone comfortable with basic trailer maintenance.

• TR-1 rigid spare tire carrier with welded bracket system
• Mounting bolts, nuts, and washers supplied for immediate installation
• Step-by-step instruction sheet for proper placement and torque specs
• No special tools or welding required—standard sockets and wrenches suffice

Who this is for: The Stromberg Carlson TR-1 is ideal for trailer owners who want a rugged, no-fuss spare tire mount that installs on a 4" square bumper. It suits owners of travel trailers, utility trailers, and similar rigs who carry standard 15" or 16" spares and prefer an exposed, accessible mount. Choose the TR-1 when you need a compact, heavy-duty carrier with reliable hardware included and a straightforward install process.