Can an 11spd chain run on a 6speed cassette?
I'm running a 10 on a 7, probably destroying it. 11 is even more narrow, no?
You might get away with it but unlikely.
https://www.sheldonbrown.com/speeds.html
Maybe. Measure the sprocket thickness, anything over 2.1mm is likely to cause problems.
@Hovis started
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Can an 11spd chain run on a 6speed cassette?