Union Chainring Nut Wrench – 1668/2

Anyone who has worked on bicycles for more than a few weeks knows the frustration: you go to loosen a chainring bolt, apply torque, and instead of breaking free, the chainring nut spins right along with it.

That’s exactly the problem the Union 1668/2 Chainring Nut Wrench is designed to solve.

At first glance, it looks simple—just a precisely bent piece of steel. But once you’ve used it, you immediately understand its value. The wrench securely holds the back side of the chainring nut in place, allowing you to confidently loosen or tighten chainring bolts without improvising with pliers, screwdrivers, or shop-made solutions.

As a bonus, Union integrated a 10 mm hex driver directly into the body of the tool. It’s there when you need it, out of the way when you don’t—and it doubles as a convenient hanging hole for tool boards or peg walls.

This is one of those tools you don’t think about until you need it—and once you have it, you’ll never want to be without it.

Key Features

• Prevents chainring nuts from spinning during removal or installation

• Simple, durable steel construction

• Integrated 10 mm hex driver

• Built-in hanging hole for easy storage

• Essential for clean, frustration-free drivetrain service