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  1. #1
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    Adjust handlebars with front tire

    Hi all,

    The handlebars on my Bianchi Premio are not straight with the front tire. There's an Allen bolt in the top of the handlebar tube and a large nut under the handlebars. Just wondering which to adjust? If it's the large nut, I don't want to scratch it up... which is easy to do. What's the best way to adjust? Thanks!

  2. #2
    RoadBikeReview Member
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    Quote Originally Posted by jopbianchi View Post
    Hi all,

    The handlebars on my Bianchi Premio are not straight with the front tire. There's an Allen bolt in the top of the handlebar tube and a large nut under the handlebars. Just wondering which to adjust? If it's the large nut, I don't want to scratch it up... which is easy to do. What's the best way to adjust? Thanks!
    There are two types of stems on bicycles (the device that connects the frame to the handlebars). A "quill" stem comes up out of the frame (it's actually inserted in the steerer tube of the fork) and makes a roughly 90 degree bend to the front of the bike and the handlebars are clamped into the end of the stem. The other kind is a "threadless" stem and it clamps to the steerer tube and projects forward where it clamps onto the handlebars. Both types of stems have an Allen bolt on the top that lines up with the fork steerer tube.

    The first thing you should do is simply try to force your handlebars to the center. Either kind of stem may not be clamped so tightly that you can't move the bars with a solid jerk.

    If you can't move the bars, then with a quill stem you loosen the Allen bolt a few turns, tap it down with a mallet (it may be loose without the tap) center the bars and tighten the Allen bolt. With a threadless stem, you loosen the bolts that clamp it to the steerer tube (NOT the Allen bolt on top), center the bars, and re-tighten the clamp on the steerer tube. It is possible that the headset would go out of adjustment with this last procedure and if that happens, loosen those bolts again, use the top Allen bolt to adjust the tension on the headset, and then retighten the stem bolts that clamp to the steerer tube.

    This may sound confusing but if you look carefully at the stem and how it is attached to the bike, you should be able to understand how it works. You can find videos on YouTube and BikeTutor to help you out.

  3. #3
    Cycling induced anoesis
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    Since you mention a large nut below the bars, I'm thinking you have a quill stem (see below). If so, follow Kerry's advice re: that type of stem.
    Name:  quill stem.jpg
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  4. #4
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    Re: Adjust handlebars with front tire

    It's definitely the quill type. Thanks much. You guys are great!

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