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Okay to measure DFT this way?

Not using the square to measure, but as a point of reference. Measuring actual distance with calipers.

Am I doing this right? 67" 2016 V-type.



  • BraceMakerBraceMaker Posts: 4,130 Mega Baller
    It's a great way to get relative dimensions but not to compare to factory.

    If you do the traditional way first then measure the width of the L and zero it. Then measure your fin you'll have the difference between the methods
  • powbmpspowbmps Posts: 132 Baller
    @BraceMaker would the factory setting be taken from where the bottom of the ski starts to curve up at the tail (~1/8" down the square)?

    Great idea on measuring the width of the L and zeroing it.
  • BraceMakerBraceMaker Posts: 4,130 Mega Baller
    Correct so there are a variety of methods. The question is if you use the fin whispering, or a ruler etc. Are you getting the exact same number as the person who recommended the setting to begin with? That's a very hard thing to do unless you know who took the measurements and could spend time both of you measuring skis until you were relatively certain you had the same technique.

    Even the fin whispering method while it does improve repeatability doesn't ensure that you're getting the same number as someone who doesn't use the shim.

    The best thing is to A: not worry about it and come up with a way you like to do.
    B: set as close to whatever the recommendations were.
    C: be comfortable messing around with it a little bit to fix variations.
    D: remember that time you put your boots on and measured to 27.5" with a steel ruler? Don't forget to try forwards and backwards with your boots a smidge before chasing that .00099 fin setting.
  • teammalibuteammalibu Posts: 904 Mega Baller
    Looks like 3/4 to me!
    Mike Erb Cedar Ridge Canton Miss.
    Horton is my hero
  • BraceMakerBraceMaker Posts: 4,130 Mega Baller
    @JaredSmith sell a 15$ Chinese caliper with a slot milled into it for 150...

    The actual caliper doesn't hold up.
  • igkyaigkya Posts: 695 Crazy Baller
    @powbmps That’s kinda how I measure mine, but I add calipers as the measuring device.
  • MarkMMarkM Posts: 132 Open or 55K Rated Skier
    Easy. No.
  • DWDW Posts: 2,113 Mega Baller
    @powbmps - that method would actually give you the correct DFT (shouldn't the definition of tail actually be the tail of the ski?), unfortunately as noted there are numerous ways people measure that parameter.

    So, why do we measure binding distance from tail and DFT using different tail references? Perhaps the same reason metric rope measurement is actual and US imperial uses inverse lengths :D
  • BraceMakerBraceMaker Posts: 4,130 Mega Baller
    It's ok Scot's slot caliper works great.
  • igkyaigkya Posts: 695 Crazy Baller
    edited November 2019
    Wonder what Scot C and Jared S have to say about this? Too soon?
  • liquid dliquid d Posts: 1,197 Mega Baller
    If you're skiing for fun, yes. If you're beyond 22 off
  • A_BA_B Posts: 4,228 Mega Baller
    Part of the reason people use tips and lay down and the butt end of the caliper for DFT or a slot caliper is consistency when sharing information with fellow skiers.
    We will all need to run out and buy a square ruler like you, same brand, etc....
    KISS approach!
  • ScottScottScottScott Posts: 917 Crazy Baller
    edited November 2019
    The only reason not to do it that way, is because it traditionally hasn't been done that way. Numbers from manufacturer have been set measuring different, so your numbers wouldn't match. This method would be much more accurate than trying to lay the caliper exactly right on the end of the ski however.

    A square is a square. And unless you've been using it as a pry-bar or hammering nails with it, even the cheapest square should be perfectly accurate and would work just fine and be consistent from one square to another. There are plenty of small/inexpensive squares that would work, doesn't need to be a large framing square.

    Like @BraceMaker said, once you measure the traditional way, then reference measuring this way, you can make more accurate changes and periodic confirmation that the settings have remained the same. Just wont work sharing with others.

    I hear slot calipers are good tho....
  • ZmanZman Posts: 1,585 Mega Baller
    This does the trick.

  • skierjpskierjp Posts: 784 Crazy Baller
    Go to YouTube and search for Chris Rossi fin set up. There are 2 videos, part 1 and part 2. Andy Mapple also has a video.
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