Heavy-Duty Swing Out Hinge Kit – CNC Machined with Uniball Design

Build your own swing-out tire carrier or rear bumper system with our complete swing out hinge kit, engineered for strength, smooth operation, and long-lasting reliability. Unlike cheap trailer bearing kits, our design uses COM16 uniballs and O-ring sealing to deliver low-maintenance performance built to handle real off-road abuse.

Complete Kit Includes

• (1) CNC-machined steel hinge barrel
• (2) Aluminum misalign spacers
• (2) COM16 uniballs
• (2) O-rings
• (1) Set of ¾” Grade 8 hardware

Rebuild Kit Includes

• (2) COM16 uniballs
• (2) O-rings

Technical Specs

• Overall height: ~4.5”
• Outside diameter: 2.25”
• Low-maintenance design with sealed uniballs and O-ring protection

Why Our Hinge Kit?

• Uniball-Based Design – Stronger and smoother than trailer bearing alternatives.
• Weather Sealed – O-rings are sandwiched between the steel housing and aluminum spacers, keeping out water, dirt, and grime.
• Smooth Operation – A light coat of grease along the O-rings ensures quiet, reliable movement over time.
• DIY Friendly – Perfect for fabricators building custom swing-out bumpers or carriers.

This hinge kit is the ultimate solution for swing-out bumper builds, giving you strength, durability, and maintenance-free performance where it matters most.