Rack Adapter for Power Racks (Fix Loose J Cups)

USE THE J-CUPS YOU ACTUALLY WANT — NOT JUST THE ONES THAT FIT YOUR RACK
✔ Patented rack adapter (US Patent 11,931,620)
✔ Fixes compatibility issues instantly  
✔ Expands your equipment options  
✔ Compatible with ANY rack system - Rogue, Titan, REP Fitness, PRX, CAP, and more
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If you’ve ever tried upgrading your J-cups, you already know the frustration:

You find the perfect set…and they don’t fit your rack. Your frustration mounts.

Why? Because THERE IS NO UNIVERSAL STANDARD for power racks. Different brands use different upright sizes (2x2, 2x3, 3x2, 3x3) and up to 6+ different pin diameters, all of which locks you into limited, brand-specific accessories.
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RESULT?
• You can’t use the equipment you actually want  
• You’re stuck with lower quality or limited options  
• Or nothing fits at all  
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THIS ADAPTER ELIMINATES THAT TRAP

This patented adapter allows you to use larger, more widely available J-cups on smaller racks by eliminating the gap between the J-cup and the upright.

Once installed:
✔ J-cups sit solid and stable  
✔ No forward movement or shifting  
✔ No more compatibility headaches  
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WHAT IT DOES (IN SIMPLE TERMS):

It fills the gap between an oversized J-cup and a smaller rack upright, locking everything into proper alignment and preventing dangerous forward slide.

A built-in top lip secures the adapter onto the J-cup so it stays in place during use.
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AVAILABLE CONFIGURATIONS:

All sizes listed as WIDTH x DEPTH (left-right x front-back when facing rack)
• Type 1 — Adapt 2x3 J-cups to 2x2 rack  
• Type 2 — Adapt 3x3 J-cups to 3x2 rack  
• Type 3 — Adapt 3x3 J-cups to 2x2 rack  
• Type 4 — Adapt 3x3 J-cups to 2x3 rack  

(See sizing chart in images for visual guide)
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WHAT YOU GET:
• Set of two adapters (one pair)  
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MATERIAL:
• 3D printed in PETG for durability and impact resistance
• Available in black, red, or custom colors (upon request)

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IMPORTANT NOTES:
• Designed specifically for J-cups (not suited for lever arms or spotter arms)  
• May reduce manufacturer-rated load capacity  
• Use at your own risk  

For custom sizing or unique setups, message me — I can design adapters for your exact configuration.
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Stop being limited by your rack.  
Upgrade your setup without replacing your equipment.