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  1. #1
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    Shimano XT 2x10 - Does it matter if a 38 AM chainring is used instead of a 38 AK?

    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.

    My question(s):

    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!

    Shimano XT 2x10 - Does it matter if a 38 AM chainring is used instead of a 38 AK?-photo.jpg

  2. #2
    What could go wrong ...
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    "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?"

    NO that needs to be replaced ASAP
    I used to ride to Win ... Now I ride to Grin

    While my guitar gently weeps, my bike sits there mocking me

  3. #3
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    Quote Originally Posted by Zoke2 View Post
    "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?"

    NO that needs to be replaced ASAP
    Thanks for the quick response - I will replace ASAP - in fact I was hoping to find 1 today so I can ride tomorrow - I called around & couldn't find the exact ring in stock, but a shop said they had a compatible size in a different brand (forgot the brand though) - how important is it that it is that exact ring? as long as the dimensions are the same, will it work?

    Thanks again!

  4. #4
    What could go wrong ...
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    if the bolt center diameter is the same it should work
    I used to ride to Win ... Now I ride to Grin

    While my guitar gently weeps, my bike sits there mocking me

  5. #5
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    Perfect! - Thanks for your help!

  6. #6
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    Update: Dammit! The ring was not the right one - can't seem to find this ring in stock anywhere local.

    I was really looking forward to a ride tomorrow - would a mellow XC ride do any harm to other components? Or is it more an issue of just being a good idea because it can easily drop again?

    Thank you.

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