The Linchpin: 5/8" to 1" Pin Adapter Sleeve Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Adapter Sleeve Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport
The Linchpin: 5/8" to 1" Pin Sleeve Adapter Fringe Sport

Frequently Bought Together

The Linchpin: 5/8" to 1" Rack Attachment Adapter Sleeve +
Mammoth Belt Squat (With Free Belt) +
Magpins: Magnetic Hitch Pins
Total Price:
The Linchpin: 5/8" to 1" Rack Attachment Adapter Sleeve $25
Mammoth Belt Squat (With Free Belt) $299 $418
Magpins: Magnetic Hitch Pins $29

The Linchpin: 5/8" to 1" Rack Attachment Adapter Sleeve

$25
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Key Features

  • Converts 5/8" Rack Attachments to fit 1" Hole Uprights
    Just because you upgrade from a rack with 5/8" holes to a rack with 1" holes, that doesn't mean you need to throw out your old attachments. Instead, convert them using these nylon sleeves.

  • Compatible with All 2x2, 2x3, and 3x3 Uprights
    The Linchpin adapts to fit these universal dimensions from ALL major brands.

  • Works with J-cups, Safety Arms, Dip Stations, Landmines, Cable Attachments, and More
    This is the ultimate quick fix for making any 5/8" attachment fit snug in 1" holes.

  • Rust-Proof by Nature
    Unlike steel sleeves, nylon won't scratch your powder coat or rust out in a humid garage.


💬 Ask Gymbo the AI
  • Gym Mouse
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  • Elephant
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Frequently Bought Together

The Linchpin: 5/8" to 1" Rack Attachment Adapter Sleeve +
Mammoth Belt Squat (With Free Belt) +
Magpins: Magnetic Hitch Pins
Total Price:
The Linchpin: 5/8" to 1" Rack Attachment Adapter Sleeve $25
Mammoth Belt Squat (With Free Belt) $299 $418
Magpins: Magnetic Hitch Pins $29

Same Pin, Any Rack

The two most common pin standards in the rack world don't play nice. Now they do.

Don't Toss Your Old Attachments

Upgraded your rack but kept your attachments? Don't replace what isn't broken. Just adapt it.

Everything You Need, Nothing You Don't

Take no time to install The Linchpin so you can get back to using your favorite rack attachments.

What Problem is The Linchpin Solving?

There are two dominant pin standards in the rack world (5/8" and 1") and they don't like to play nice with each other. A TON of garage gym owners end up with attachments from multiple brands, multiple rack generations, or both. The result? Perfectly good equipment sitting in a corner because the pin is the wrong size for your rack.

The Linchpin is for garage gym owner who's mixing equipment across brands and generations. You bought great attachments for an old rack, upgraded to a 3x3, and now they don't fit. Or you scored a deal on a used 5/8" pin attachment and your rack runs 1" holes.

This sleeve bridges that gap permanently.


IT DOESN'T RUST. EVER.
No zinc coating. No plating. No degradation. Nylon is inherently rust-proof, which makes this the right call for humid garages, outdoor setups, or anywhere moisture is a factor. And even better, it won't scratch up the rack you invested a ton in.

Compatible Pin Size

5/8"

Compatible Hole Size

1"

Compatible Rack Size

2x2, 2x3, 3x3

Sleeve Length

3.125"

Sleeve Material

Nylon

Hardware

Steel Set Screws

What's Included

2 Sleeves, 4 Set Screws, 2 Allen Wrenches

Sold As

Pair

Warranty

1-Year Manufacturer's Warranty

Product ID

9769

Do NOT Throw Away Your 5/8" Rack Attachments

Yes. These sleeves don't bear the load. Instead, the pin does. The nylon handles the fit and protects your rack finish.

Just about any rack with 1" holes on 2x2, 2x3, or 3x3 uprights.

Any attachment with a 5/8" pin. J-cups, safety arms, dip handles, landmines, cable attachments, and more are all included.

Yes. The included Allen wrench tightens the set screws to lock the sleeve onto the pin.

That's normal. The sleeve is designed to slide onto the pin first, then the set screws lock it in place. Don't force it. Just tighten evenly and it'll be rock solid.

No. Those are a different product that addresses upright width, not pin diameter. This sleeve specifically solves the 5/8" to 1" pin size mismatch.

Required By California Law - WARNING: This product may have materials, which are known to the State Of California, that can cause Cancer and Reproductive Harm. For more information, California Prop 65: https://www.p65warnings.ca.gov/

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