Attention Dirt Drop Users: help me!- Mtbr.com
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  1. #1
    giddy up!
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    Attention Dirt Drop Users: help me!

    Does anyone have a reccomended starting point for stem length and rise when using dirt drops? My situation is this....I have a surly KM that I am dying to try some dirt drops on. I am currently using a 120mm x 6 degree rise with a flat bar.

    Any idea what length and rise would be a good starting point based on the current bar/stem setup?

    Thanks for the help, Brian
    www.thepathbikeshop.com

  2. #2
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    Step 1: Remove dirt drops.
    Step 2: Re-install riser or flat bars.
    Step 3: Re-install your regular stem
    Step 4: Go riding.
    Step 5: Keep the drops on the road bike.

    Hope that helps! =)

  3. #3
    giddy up!
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    Hey...

    ....it's a spare bike, I'm just experimenting!

    We should put some drops on your "other" SS!


    Quote Originally Posted by Padre
    Step 1: Remove dirt drops.
    Step 2: Re-install riser or flat bars.
    Step 3: Re-install your regular stem
    Step 4: Go riding.
    Step 5: Keep the drops on the road bike.

    Hope that helps! =)
    www.thepathbikeshop.com

  4. #4
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    Dude, that would be sick!

    I could compete w/ Shiggy as far as interesting rigs go!

    Let's do it! Dirt drops on the Bullit! We'll add some 300mm cranks too. I think the high BB of the Bullit will surely accomodate.

  5. #5
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    Dude...

    .....you're tall enough, go 305mm....the extra 5mm will really help out.


    Quote Originally Posted by Padre
    Dude, that would be sick!

    I could compete w/ Shiggy as far as interesting rigs go!

    Let's do it! Dirt drops on the Bullit! We'll add some 300mm cranks too. I think the high BB of the Bullit will surely accomodate.
    www.thepathbikeshop.com

  6. #6
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    Quote Originally Posted by donkey
    .....you're tall enough, go 305mm....the extra 5mm will really help out.
    Yes, I've calculated a 16.0795% increase in expostulated cross-referenced and circumnavigated leverage. Plus my legs will make such a big circle that my feet will actually rise above the handle bars on the up stroke creating power heretofore unseen by mortals.

  7. #7
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    Step 1.5

    Quote Originally Posted by Padre
    Step 1: Remove dirt drops.
    Step 2: Re-install riser or flat bars.
    Step 3: Re-install your regular stem
    Step 4: Go riding.
    Step 5: Keep the drops on the road bike.
    Step 1.5: Send the Dirt Drops to me!

    No really, you probably should start with about a 150x30deg stem to get the hooks/drops up level with your flat bar position. With some trig you should be able to figure it out exactly if you can find the drop and reach of the DDs.

    OR, just scr*w it and send 'em to me.

  8. #8
    giddy up!
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    Huh..

    ......don't I want to go with a shorter stem?


    Quote Originally Posted by 03bart
    Step 1.5: Send the Dirt Drops to me!

    No really, you probably should start with about a 150x30deg stem to get the hooks/drops up level with your flat bar position. With some trig you should be able to figure it out exactly if you can find the drop and reach of the DDs.

    OR, just scr*w it and send 'em to me.
    www.thepathbikeshop.com

  9. #9
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    Quote Originally Posted by donkey
    Does anyone have a reccomended starting point for stem length and rise when using dirt drops? My situation is this....I have a surly KM that I am dying to try some dirt drops on. I am currently using a 120mm x 6 degree rise with a flat bar.

    Any idea what length and rise would be a good starting point based on the current bar/stem setup?

    Thanks for the help, Brian
    Try a 130 x 40° or 110 x 40°. Nashbar has them on sale for $17 http://www.nashbar.com/profile.cfm?c...eid=&pagename=
    You may need some spacers under it.
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  10. #10
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    Thanks Shiggy...that helps...

    Am I correct in thinking that I want the drops to be at about the same height that a flat bar would be at?

    Quote Originally Posted by shiggy©®™
    Try a 130 x 40° or 110 x 40°. Nashbar has them on sale for $17 http://www.nashbar.com/profile.cfm?c...eid=&pagename=
    You may need some spacers under it.
    www.thepathbikeshop.com

  11. #11
    flexiflyer
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    I wrote a good bit about this on the old board:


  12. #12
    flexiflyer
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    Quote Originally Posted by donkey
    ......don't I want to go with a shorter stem?
    No, you don't. Read the links I've posted in this thread!

    MC

  13. #13
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    Excellent!

    Thanks for the links Matt, the last one in particular cleared up what I was thinking in regards to shorter/longer stems...It all makes sense now:-) I hope that I can find something tall/long enough to get this setup properly, I am dying to try these dirt dropd out! I'll post pics when I get a stem and see what ya'll think.


    Quote Originally Posted by flexiflyer
    No, you don't. Read the links I've posted in this thread!

    MC
    www.thepathbikeshop.com

  14. #14
    all hail der Fuhrer Bush
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    my Ibis LD stem

    measures about 17cm vertically from the top of the headset to the center of the bar clamp, with about an 8cm forward extension. the true test is whether you can do long rides whilst riding in the drops 100 percent of the time. set up "properly" you would never want to ride on the hoods, nor could you, because your brake levers are so low on the curve for comfy access in the drops that you can't get your hands on the hoods without reaching over the top of the bar. see pix of Jacquie Phelan's old Cunningham Indian for a good setup; and pix of Tomac the year he raced with drops for a bad setup. none of the stem dimensions mentioned in this thread sound high enough to me.

  15. #15
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    Here's a link to more info on off-road drop bar set-up. http://forums.mtbr.com/showthread.php?t=5119

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