South Salem Cycleworks: Salem, Oregon
(503) 480-2001
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Vintage Components - Atom French-threaded freewheels

On this page: 6-speed Atom 13-26
Atom English-threaded freewheels are posted here.

Important: Do Not try to mount a French-threaded freewheel on an British or Italian-threaded hub. It will start, but as it is screwed on it will bind and destroy the threads. Also, do not mount a British or Italian-threaded freewheel on a French-threaded hub. It will screw on, but then slip under load.

French Freewheel threading: 34.7 x 1mm (1.366" x 25.4 TPI)
British freewheel threading: 1.37" x 24 tpi

Atom, a French component maker, produced very high-quality freewheels from the 1960s into the 1980s. Since they came on many inexpensive French bike-boom bikes, in the U.S. it was generally thought they were not as fine as other brands, such as Regina.

Riders who did use them for serious cycling found they were probably the most rugged, reliable freewheels available. And, they shifted quite well (this was the friction era).

There is a lot of compatibility between Atom and Regina cogs.

The cogs were usually black, but there was an occasional silver Atom freewheel.

Freewheel Widths. We measured our freewheels and:

The 5-speed freewheels are 25mm wide
The Compact 6-Speed freewheels are 29mm wide
The Regular 6-speed freewheels are 32mm wide

Atom French-threaded 6-speed freewheel, 13-26. Used $70.00

Part# FW-11-02

We have completely rebuilt this freewheel with fresh grease and oil. It is ready to go.

Atom freewheel

A classic, a very well-made classic

Atom freehweel

From the side

Atom 13-26 freehweel

And from the bottom