On Saturday, September 16, 2017 at 6:30:48 PM UTC-4, wrote:
Snipped
Since the switch to cassettes (8+ cogs) from freewheels https://www.sheldonbrown.com/free-k7.html , the axle width has remained the same while the cog teeth and chains have become narrower. Since the load and the length are the same, the pressure per square inch has increased to the point where an 11 speed chain basically needs changed with the tire. Single speed chains will basically last until rusty.

I've resurrected single-speed (coaster brake or 3-speed type)that were rusted nearly solid.


Cheers