Extreme Max Spare Tire Carrier for Angle Iron Trailer Frames — Fits 12"–15" Wheels, 1.5"–2" Frame Width

The Extreme Max 3005.3868 Angle Iron Spare Tire Carrier is a compact, heavy-duty bracket that secures 12"–15" spare wheels to angle iron trailer frames 1.5"–2" wide and 11-gauge to 1/4" thick.

This spare tire carrier is engineered for trailers with angle iron rails, delivering a small footprint and wide bolt pattern compatibility so you can mount common wheel sizes without modifying the frame. It’s designed to accept wheels up to 15" diameter and 8" width and supports popular bolt patterns for utility, boat, and cargo trailers. The bracket’s overall width is 8-1/8" with a 3" height, making it a space-conscious choice for stowing a spare tire under or alongside your trailer frame.

How does this carrier attach to my trailer frame?

The carrier clamps to angle iron frames between 1.5" and 2" wide and works with material thickness from 11-gauge (about 1/8") up to 1/4". Installation uses the bracket’s integrated mounting surface and hardware to secure the carrier to the flange, providing a straightforward bolted connection without welding.

• Fits angle iron widths: 1.5"–2"
• Accommodates thicknesses: 11-gauge (1/8") to 1/4"
• Designed for bolted attachment — no frame welding required
• Compact 8-1/8" x 3" footprint for tight spaces

What wheel and bolt patterns will this bracket accept?

The carrier supports wheel diameters from 12" to 15" and rims up to 8" wide, covering most common trailer spare sizes. It’s compatible with several industry-standard bolt patterns, so you can mount broad ranges of hub configurations without custom adapters.

• Wheel diameters: 12"–15"
• Maximum rim width: 8"
• Compatible bolt patterns: 4 on 4, 5 on 4-1/2, 5 on 5, 6 on 5-1/2, 8 on 6-1/2
• Accepts most common trailer spare wheels used on utility and boat trailers

Will mounting this carrier affect trailer safety or clearance?

When properly installed, the carrier keeps the spare securely stowed with minimal added width and height. Because it adds concentrated weight to the frame, you should confirm your trailer’s frame and suspension can safely carry the combined load of the bracket plus tire before installation.

• Compact dimensions reduce interference with tongue or side clearance
• Check trailer manufacturer load ratings for safe carrying capacity
• Position carrier to avoid contact with ground or obstructions
• Use correct fasteners and torque to maintain secure mounting

How easy is installation and what tools are required?

Installation is a straightforward mechanical process for anyone comfortable with basic trailer maintenance. You’ll need common hand tools to bolt the carrier to the angle iron; no welding or special fabrication is necessary.

• Requires standard wrenches or socket set for bolted attachment
• No welding or cutting of the frame required
• Follow recommended torque specifications for safe mounting
• Allow time to verify clearance and wheel alignment before final tightening

Who is this for: The Extreme Max 3005.3868 is aimed at owners of small trailers—utility, landscaping, boat, and cargo trailers—who need a durable, space-efficient spare tire solution for angle iron frames. It’s ideal for DIYers and professional installers who want broad bolt pattern compatibility and a low-profile mount that won’t intrude on trailer storage or ground clearance. Before purchasing, ensure your trailer frame dimensions fall within the specified width and thickness ranges and verify the frame’s load capacity to support the tire plus bracket.