Atom 77 Compact (6 speed)
Main Photo
Category:  Freewheels
Name:  Atom 77 Compact (6 speed)
Brand:  Atom
Years:  1970's - 1980's
Country:  France
Added By: greenebike on 02/23/11
Updated By: peterbman on 05/10/15
Additional Photos - click for full size
Atom 77 Compact (6 speed)Atom 77 Compact (6 speed)Atom 77 Compact (6 speed)Atom 77 Compact (6 speed)Atom 77 Compact (6 speed)Atom 77 Compact (6 speed)
Cog Count 6Available ThreadingEnglish/ISO: 1.370" x 24;
French: 34.7mm x 1mm
ColorBlackIndex Compatibility Non-indexed, standard spacing
Cog MaterialsSteelIdentifying Markingsatom 77 compact
Removal Tool Style SplinedRemoval Tool 
Original Available Ranges14-28;
Numerous cog arrangements
General Information
 "Atom 77 Compact" freewheel was for narrow chains, whereas the Atom 77 was for normal width chains.
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Additional Resources
Resources:Reference & ChartsGear Calculator
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