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  1. #1
    SAB
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    Fork change from threaded to threadless

    I have a trek 5200 with a threaded fork and I am considering changing the fork to a threadless system. Anyone know if the headtube on a '96 5200 will accept a 1 1/8" threadless fork steerer and headset? Also, I have another frame which is designed to take a 1 1/8" threaded steerer - would I be able to take my fork and headset off the trek and install them on this frame?

  2. #2
    Senior Member sydney's Avatar
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    Quote Originally Posted by SAB
    I have a trek 5200 with a threaded fork and I am considering changing the fork to a threadless system. Anyone know if the headtube on a '96 5200 will accept a 1 1/8" threadless fork steerer and headset? Also, I have another frame which is designed to take a 1 1/8" threaded steerer - would I be able to take my fork and headset off the trek and install them on this frame?
    You need a 1" steerer and HS.

  3. #3
    You need a new bike supcom's Avatar
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    You also need to make sure that there is a headset available for the headtube inside diameter.

  4. #4
    Senior Member sydney's Avatar
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    Quote Originally Posted by supcom
    You also need to make sure that there is a headset available for the headtube inside diameter.
    It's standard iso 1": 26.4 crown race and 30.2 cups. Why muddy the water unnecessarily? No Trek or other quality frame I know of built in the US would have used the pretty much obselete JIS standard.

  5. #5
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    Quote Originally Posted by SAB
    I have a trek 5200 with a threaded fork and I am considering changing the fork to a threadless system. Anyone know if the headtube on a '96 5200 will accept a 1 1/8" threadless fork steerer and headset? Also, I have another frame which is designed to take a 1 1/8" threaded steerer - would I be able to take my fork and headset off the trek and install them on this frame?
    Out of curiosity - why the switch? The cost of fork, headset, & stem is going to add up with little (or no) functional improvement.

  6. #6
    Senior Member sydney's Avatar
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    Quote Originally Posted by PdxMark
    Out of curiosity - why the switch? The cost of fork, headset, & stem is going to add up with little (or no) functional improvement.
    You can save alot of weight with an all CF fork and light bar and stem. There are also differences in the way forks ride if you choose right. All CF forks aren't the same.

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