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  1. #1
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    Bike build - Question 2 - Steerer length

    Another question or more of a "please check my math".

    I have frame with 125mm head tube. The headset stack is 30.3mm. Stem clamp stack is 40mm. That all comes to 195.3mm (~7.7"). So if I were to look for an used fork, I need the steerer tube to be at least 7.7", correct? Or am I missing something?

  2. #2
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    You might add in another 1/2" or more in case you want to use some spacers under the stem.

  3. #3
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    I'd have to agree with Jeffj, but not just for spacers, but also because 40mm may not be the height of the stem clamp you use. I've seen them go from 40mm to 50mm (with more stem angle).

    John
    1995 Trek 970 - 80mm Atom Race
    1992 Serotta T-Max - 70mm Z3 Light
    1993 GT All Terra - 46mm Mag 21
    (STOLEN)

  4. #4
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    Thanks guys. I guess that rules out me buying an used fork. Not many of them still have 8" or longer steerer.

  5. #5
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    They are out there, but you will have to be diligent about making sure that steerer is long enough.

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