Swapping frame for larger size with longer head tube - is that a deal breaker?- Mtbr.com
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  1. #1
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    Swapping frame for larger size with longer head tube - is that a deal breaker?

    I wanted to try swapping out my 2011 pitch pro medium frame for a Large of the same year- keeping all the same parts.
    However I just noticed that the "head tube height" jumps from 108mm to 128mm on the large size.

    This means I'd need a new fork right?

  2. #2
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    Reputation: J.B. Weld's Avatar
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    It depends on how many spacers you have on your current one.

  3. #3
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    3 spacers, (2 below the stem and 1 above), I tried measuring them with a tape measure in 16ths of an inch, they are maybe 5mm each. So 15mm total. Still 5mm shy.

  4. #4
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    You might be able to lose a few more millimeters by replacing your stem with another one that isn't as tall (the part that clamps on the steer tube). Also a headset with a shorter stack height may be an option.

  5. #5
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    Lower stack stem will be the easy route for sure. You might want a shorter stem with the longer frame anyways.

    If it's just a couple of mm short of optimum, it's not that bad especially with metal steerer tubes. If you have a carbon steerer, it should actually poke through the stem and it is advisable to have a spacer on top of the stem.

  6. #6
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    Is your stem pointed up? Flip it

  7. #7
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    Something just occurred to me, so I am going for a larger frame mostly for the reason of feeling like my legs are too long in the medium size. I have a disproportionately long inseam and figured with a size larger, along with a shorter stem, the Large size would likely fit me perfectly.

    On the specialized geometry chart, the Large has a stack height 20mm more than the Medium.
    Since the fork size is always the same for the 26" wheels and the bottom bracket height stays the same through all sizes, this added stack height is obviously all found in the additional head tube height.
    So by removing spacers and possibly using a shorter (in height) stem to accommodate my fork... I basically return to the medium size "Stack" height.

  8. #8
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    Reputation: RS VR6's Avatar
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    If you have a tall cap. You can always try a shorter one.

    Swapping frame for larger size with longer head tube - is that a deal breaker?-img_20151018_131335.jpg

  9. #9
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    Nothing wrong with laying a 5mm stem washer above the stem itself: it's totally stable and may help the fork's resale value(slightly).
    "This is a male-dominated forum... there will be lots of Testosterone sword-shaming here" ~ Kenfucius

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