Park Tool FR-4 Atom Splined Freewheel Remover

Park Tool FR-4 Atom Splined Freewheel Remover Park Tool

Park Tool FR-4 Atom Splined Freewheel Remover

Park Tool FR-4 Atom Splined Freewheel Remover

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What Makes the FR-4 the Right Freewheel Remover?

The Park Tool FR-4 is designed specifically for Atom-brand splined freewheels, a tool you need when working on older bikes equipped with this particular freewheel standard. Its precision-machined body engages the splines cleanly, allowing you to apply real torque without stripping the remover or the freewheel itself. Built from hardened steel, the FR-4 gives you a secure grip on the freewheel body so removal goes smoothly even when the freewheel is stubborn from years of riding.

Park Tool's commitment to job-specific tooling means you're not forcing a universal solution onto a precision fit. The FR-4 slots directly into your bench vise or works with a wrench for leverage, giving you the mechanical advantage needed to break free a stuck freewheel without drama.

$8.95
$8.95
Shipping calculated at checkout.

3 in stock

  • Orders over $100 ship free!
  • Estimated delivery: Aug 10 - Aug 14

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Specifications

  • Compatible Freewheel: Atom splined
  • Material: Hardened steel
  • Drive Interface: 3/8 in square drive or bench vise

FAQ

Will the FR-4 work on Sun Tour freewheels?

No. The FR-4 is designed specifically for Atom splined freewheels. For Sun Tour freewheels, use the Park Tool FR-2.

Do I need a bench vise to use the FR-4?

Not necessarily. The FR-4 works best in a bench vise, but it can also be driven with a wrench for field removal.

Is the FR-4 compatible with modern cassette drivetrains?

No. The FR-4 is a freewheel-specific tool and is not compatible with cassette-style drivetrain systems.

Best For

Mechanics and home wrenchers servicing vintage or older bikes built around Atom splined freewheels. A must-have specialty tool if this standard is in your shop rotation.

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