I recently had some work done at my usually very reliable LBS - among other things, I had really worn out the chain and was prepared to just replace the entire drivetrain. One reason I like the mechanic here is that he doesn't oversell - he recommended to just put on a new chain and see how it does - with the new chain I was still having issues in the large front ring, so we changed that and it was working ok but not perfectly crisp - we decided to just go with this for a while since I was strongly considering 1x in the near future so I appreciated trying to get as much mileage as possible out of my current setup - shortly after that, I dropped the chain riding down some pretty gnarly stuff and the chain bent and a couple of the teeth basically sheared down to nubs - still rides ok with a new chain but shifting isn't smooth.
I was bummed that I needed a new chain and ring again already - I looked up the part # to order a new ring and realized he had placed a 38 AM instead of a 38 AK - the 38 AM is supposed to go with a 24 small ring - I have the 26 small ring which is supposed to pair with the 38 AK.
Does it really matter that he placed the AM instead of AK? In other words, did he make a major mistake that maybe set me up for these potential failures / issues?
Is he correct that you don't necessarily need to replace the drivetrain when a chain gets completely worn down?
Can I safely ride this large ring with the damaged teeth or am I just going to have non-stop issues or mess up something else?
Thanks in advanced for your expertise!
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