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  1. #1
    Member finsfree's Avatar
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    Going form a triple chainring to a double

    Hello,

    My bike come originally with a triple chainring crank. Could I change to a double chainring crank without doing to much modifying?

    As far as modifying though, I am guessing I will have to buy a new bottom bracket (one that will work with the new crank that I get) and do some adjusting to the front derailleur?

    Correct me if I am wrong....

  2. #2
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    Unless there's an issue of chainring selection, you can simply remove the third chainring. Ideally you'd want to move the crank inboard by about 3mm to correct the chainline difference (assumes it was right in the first place), but in many cases it isn't necessary.

    If you do replace the crank, you may or may not need to replace the bottom bracket or spindle depending on what the new crank calls for.
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  3. #3
    Member finsfree's Avatar
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    Quote Originally Posted by FBinNY View Post
    Unless there's an issue of chainring selection, you can simply remove the third chainring. Ideally you'd want to move the crank inboard by about 3mm to correct the chainline difference (assumes it was right in the first place), but in many cases it isn't necessary.

    If you do replace the crank, you may or may not need to replace the bottom bracket or spindle depending on what the new crank calls for.
    Gotcha! Thanks!

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