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  1. #1
    mtbr member
    Join Date
    Apr 2010

    2X9 conversion on LX octagon crankset questions

    I have read the threads about coverting to 2X9 and thought that it was a straightforward process. If that is the case please excuse the dumb questions .

    I thought that it's possible to remove the middle ring and replace it with the outer ring. I have tried every combination possible and it will not fit unless I remove some metal inboard of the bolt holes on the chainring.

    I plan to ride my bike mainly on the pavement. Given that I wish to use a 42T chainring in the middle position, what is the largest size inner ring that is practical and where can I buy it? I realise that the size is likely to be limited by chainstay clearance.

    It would appear that a 28 or 29 X 42 combination will work.

  2. #2
    meow meow
    Reputation: b-kul's Avatar
    Join Date
    Sep 2009
    i think you have to keep the big ring on the outside if you dont want to do any modding. id look at some of the sram 2 ring cranksets to see what chainring sizes they use.

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