Thread: Freewheel Clear out, new old stock and new-ish: SunTour and Shimano
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Old 09-18-17, 12:00 PM
  #20  
ThermionicScott 
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Originally Posted by jamesdak
Hmmm, what does ultra spaced mean on the suntours?
The 6-speed freewheels have a 5.0mm center-to-center cog spacing, rather than the regular 5.5mm, to fit into a 120mm rear triangle. 6-speed ultra spacing became the predominant 7-speed spacing, to allow 7 cogs in the space of 6.

https://www.sheldonbrown.com/cribsheet-spacing.html
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