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  1. #1
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    Headset question: ZS49 bottom cup and tapered steerer?

    Hi guys, here bothering again.

    In continuation to my previous thread:
    HELP - Tapered fork on 1.5" straight head tube?

    Turned out the Jamis Komodo has a 49mm internal diameter headtube (measured).
    Trying to fit a tapered fork, so I need a bottom cup that has this diameter, but all I'm able to find is either 55 or 56mm. I'm talking zero-stack headsets.

    My guess is, being only 49mm, there is no room for the bearing to sit in between the headset inner wall and the steerer.
    At least is the only explanation I've figured, since I can't seem to find ANY ZS49 1.5" lower cup. All of them come with a reducer to 1 1/8".

    Someone adviced me to use an EC49, but since It would imply affecting my headtube angle by some margin, It dosen't seems the most tempting alternative (I'm already jumping from 130 to 150mm of travel).

    Is this my only choice?


    Thanks in advance.

  2. #2
    > /dev/null 2&>1
    Reputation: Procter's Avatar
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    Yes you'll need an EC 49.

  3. #3
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    Yes, EC49 is the only option if you want to use a tapered fork. The height of an external headset cup will only affect your HTA by about 1/3-1/2 degree, suggest maybe consider lowering the fork if you're worried the HTA will be too slack for your liking, but only once you've ridden the bike with it set @ 150mm like you were intending.
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  4. #4
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    Quote Originally Posted by Procter View Post
    Yes you'll need an EC 49.
    Quote Originally Posted by LyNx View Post
    Yes, EC49 is the only option if you want to use a tapered fork. The height of an external headset cup will only affect your HTA by about 1/3-1/2 degree, suggest maybe consider lowering the fork if you're worried the HTA will be too slack for your liking, but only once you've ridden the bike with it set @ 150mm like you were intending.
    Roger that, thanks for the input.
    In all honesty I'm not very concerned about the HT angle, as my previous fork was a 160mm Domain (130 was the stock Suntour) and still handled pretty well for my liking. I just wanted to give it a slighty more "neutral" position, but I'll get over it
    Last edited by Dan_Mack; 4 Days Ago at 10:58 AM.

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