Originally Posted by
Duragrouch
I also don't know. But higher speed systems have everything thinner (and thus less durable, given the same material quality). So an older system like a 9 chain on 12 cogs and chainrings, I think the wider outside width of the 9 chain may be a problem on a 12 cassette with noise and possible unintended upshifts, and the wider inside diameter may be a problem on a 12 chainring as it may be less stable, may want to twist slightly.
I was only asking about using a 9 or 10-speed chain with an 11-speed or 12-speed crank (and chain rings), not the other way. I assume that
VegasJen would keep her existing chain to maintain compatibility with the rest of the drive train. I understand from using 10-speed chain rings with an otherwise 11-speed drivetrain that cassette and chain must match.
Originally Posted by
Troul
if it were an eight speed cassette, I'd paint a different picture with my thoughts.
9+ cassette with 11 speed crank, i expect that it'll be ok. I haven't put raw numbers together to establish a professional data sheet, but even then a real world test can reveal different outcomes that calculated data might not factor.
Originally Posted by
cyccommute
Yes, a 9 speed chain will work on a 12 speed crankset. The distance between rings on a crankset aren’t narrower, although the ring itself is narrower. The width of a chain is dependent on the cassette spacing, not on the crank.
Even so, would the greater inner width of a lower speed chain allow the chain to slide laterally across the thinner teeth of the high speed chain rings, thus leading to faster wear?