1x shifting malaise, chain line and chainring offset. questions, questions

[lechatnoir]

I built a gravel bike up with 1x Apex groupset - I'm using a 38t chainring and 10-40 cassette. Shifting is fine, but the 38/40 has a tendency to drop down to the next cog on the cassette and when it doesn't, it's pretty rough sounding?

 

Could it be that the chain line isn't 100s and I need to move the chainring inboard? If so, would an offset chainring accomplish this magic for me?

[Heinrichgg]

Possible that your upper limit screw just needs to be released a half turn?

[100Tours]

I built a gravel bike up with 1x Apex groupset - I'm using a 38t chainring and 10-40 cassette. Shifting is fine, but the 38/40 has a tendency to drop down to the next cog on the cassette and when it doesn't, it's pretty rough sounding?

 

Could it be that the chain line isn't 100s and I need to move the chainring inboard? If so, would an offset chainring accomplish this magic for me?

 

you can roughly check chainline by eye - front chainring should be approx. the middle of the cassette.

 

If it is out then first check to see you have the L-R spacers right on the crankset/BB.

Edited January 13, 2020 by 100Tours