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  1. #1
    mtbr member
    Join Date
    Nov 2018

    Converting a Giant Fathom 1 to a double chain ring?

    Can anyone tell me if you can convert the Fathom 1 from a single chain ring to a double?
    I know everyone is going the other way but I use this bike for a bit of everything and find i could use a bit more on the top end when Iím cruising on the blacktop with a slight downhill and the wind behind me and conversely feel I could do with an extra on the bottom end when on a steep single track carrying some overnight gear.

  2. #2
    since 4/10/2009
    Reputation: Harold's Avatar
    Join Date
    Dec 2003
    This one?

    It has a mount for a direct mount front derailleur (looks like high direct mount), so yeah it can. You will have to make a number of changes to the drivetrain to make it work, though. You'll definitely need a new cassette (11-46 can only be used 1x), and quite possibly a long cage rear derailleur (specs don't say which one comes on the bike). Luckily it looks like your crank takes the SRAM direct mount rings, so you should be able to install a SRAM direct mount 2x spider (so long as it's boost compatible) without changing the whole crankset.

    Keep in mind that you are going to have to figure out how to deal with the dropper post lever once you mount a front shifter. It's addressable, but it's another expense and it's going to be in a different location more than likely (shifter style dropper post levers are the most popular ones right now) and you may or may not like that.

  3. #3
    mtbr member
    Join Date
    Nov 2018
    Thank you for that.

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