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  1. #1
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    Can this headset fit a 1 1/8" fork: 25.4/34.0/30.0, 36.3mm stack height?

    Aheadset, semi-cartridge, 25.4/34.0/30.0, 36.3mm stack height.

    The above are the headset model and dimensions for a 2005 Gary Fisher Utopia I'm thinking about. What I am trying to confirm is whether this headset takes a 1 1/8" steering tube?

    I think the 25.4 is the inside dimension of the headset (25.4mm = 1"). The other dimensions, I assume, relate to the cones?

    When I scouted out Bikepedia, they reference a 1 1/8" headset, and do so for this model all the way back to 2001 or so.

    If the 25.4 is the inner dimension (for the fork steer tube) and I'm SOL, could I replace the headset entirely with a new one to fit a 1 1/8" fork?

    Any help, insight here would be appreciated.
    Thanks.

  2. #2
    nothing to see here
    Reputation: Stevob's Avatar
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    got any links to the model?
    I see hills.

    I want to climb them.

  3. #3
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    Not really.

    Here's a link to the tech sheet I got the headset data from (http://www.vintage-trek.com/Trek-Fis...cmanualALL.pdf).

    Bikepedia was also a resource (2005 Gary Fisher Utopia - BikePedia).

    Thank for your interest.

  4. #4
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    Reputation: syl3's Avatar
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    Stop wasting time with tech sheets, take some calipers and measure the head tube and the fork steerer. If the HT is 34mm inside diameter you can fit a 28.6 steerer. If it's 30mm dia there is not enough place between the 1.1/8 steerer and the head tube to press a headset cup.

    Usually 1 inch steeer forks fit in 30mm frames, the only way your frame takes 1.1/8 is if Gary Fisher designed it for 1.1/8 and then slapped on a reducer headset to unload some old stock of 1" forks, this sometimes happens on lower end models in the first year when they adopt a new standard, i've seen it many times on Giant and Trek bikes.

  5. #5
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    Haha, if it were that easy.... I don't own the bike yet. Its a Craigslist transaction and don't want to drive an hour both ways to check it out, if it won't work for me. My end game is an inexpensive disk compatible commuter/cyclocross/29er rig.

  6. #6
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    Can this headset fit a 1 1/8" fork: 25.4/34.0/30.0, 36.3mm stack height?

    25.4 is probably the stem, so it may have a threaded quill stem. 34mm is most likely the ID of the head tube, and 30mm is the crown race, which is the size used with 1-1/8" steerers. Based on those measurements you can fit a 1-1/8 steertube, plan on replacing the headset with a threadless and a new stem.

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