FR-4 ATOM Cassette/Freewheel Remover

Description

The Park Tool FR-4 ATOM Cassette/Freewheel Remover is a precision shop-grade tool for removing select threaded freewheels from compatible rear hubs. Designed for vintage and classic drivetrains, this park tool remover fits older Atom-style systems and other matching splined freewheels with secure engagement.

• Compatible with Atom freewheels using a 20-spline interface.
• Also fits Regina and splined Zeus freewheels.
• Commonly used on some Schwinn Approved freewheels with the same fitting.
• Tool profile matches a 20-spline / approximately 21.6 mm outer diameter interface.
• Replaces the need for a generic wheel and freewheel tools fr- atom cassette/freewheel remover when exact FR-4 fit is required.

Built by Park Tool USA, the FR-4 is manufactured for dependable spline engagement and repeatable use in home or professional bike service. This remover is intended for older freewheel designs rather than modern cassette lockrings, making correct identification especially important before installation or removal. Its durable steel construction helps resist rounding under load, and the compact profile works well with common shop wrenches or bench-vise methods depending on your preferred setup. If you need a reliable park tool usa fr- atom cassette/freewheel remover for classic drivetrain service, the FR-4 is a proven choice with straightforward, low-difficulty DIY use.

OEM-quality Park Tool performance for vintage freewheel service. Easy DIY installation and removal with the proper matching freewheel interface.