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Dark Owl DXX (Fatigue testing vid page 6)

Discussion in 'Downhill & Freeride' started by troy, Feb 24, 2015.

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How long chainstay should be at SAG point?

  1. 16.7" (425 mm)

    13.5%
  2. 16.9" (430 mm)

    13.5%
  3. 17.1"(435 mm)

    38.5%
  4. 17.3" (440 mm)

    23.1%
  5. 17.5" (445 mm)

    9.6%
  6. more than 17.5"

    1.9%
  1. troy

    troy Monkey

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    Harder, better, faster, stronger.

    Just like DH01 it will be made of 4130
    • High pivot
    • horst link,
    • idler
    • 8" of travel
    • 7075 T651 links
    • 24mm pivots
    • PM 74 brake mount

    So I've updated few things...

    • Frame weights now 8.6 lb. without the shock.
    • Moved from 10.5"x3.5" shock to a 9.5"x3" damper.
    • Changed the axle path a little -0.2" (5 mm) so it has 0.78" (20 mm) of reward axle path.
    • Shortened the CS as well to 16.9" (430 mm).
    • Moved to 83mm BB.
    • 44mm HT
    • 7075 T651 axles
    • It is now brakeless due to FknMagic technology.


    Wheel rate stays exactly the same as in DH01 .

    Bearings near the rear axle are sealed now with a proper set of rotary seals, so they stay nice and clean.

    I've got in touch with a very skilled local framebuilder, so I hope we will make some 1st batch of those babies quite soon.

    What do You think?

    DH02_2.png
     
    #1 -   Feb 24, 2015
    Last edited: Feb 25, 2015
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  2. Sandwich

    Sandwich Pig my fish!
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    i think it's friggin awesome.
     
  3. TrumbullHucker

    TrumbullHucker trumbullruxer

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    100% this!
     
  4. 4130biker

    4130biker PM me about Tantrum Cycles!

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    Rad!
     
  5. blindboxx2334

    blindboxx2334 Turbo Monkey

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    do i dare ask...?

    Wheelsize?
     
  6. troy

    troy Monkey

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    Can I ask You guys for something? Can You please send me a PM about:

    How tall are You and on what frames You were feeling the most comfortable?

    26", You think 27.5 would be better? (no 26"v650b war plz)
     
  7. Sandro

    Sandro Turbo Monkey

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  8. blindboxx2334

    blindboxx2334 Turbo Monkey

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    i am just being a smartass and trying to stir the pot.

    as for your request. im 5'11" and had a medium operator (pre-carbunz); wish i ended up getting a large instead.
     
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  9. troy

    troy Monkey

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    Had a chance to try a Large 2011 Operator (I think). I'm 6' 1.5" and I felt very comfortable on that bike. That's why DH02 will get 17.7" (450 mm) reach and 23.6" (600 mm) stack compared to 16.7" reach and 23.6" stack on DH01.
     
  10. nmn25

    nmn25 Monkey

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    6'2" xl canfield, large entourage, new xl nomad were the best I've been on
     
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  11. jstuhlman

    jstuhlman We noticed.

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    6'1" and always been comfortable on L frames. Tend to like things a bit roomier than some, but standover as low as possible.
     
  12. troy

    troy Monkey

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    What model year Canfield, 2014? Jedi I guess?
     
  13. troy

    troy Monkey

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    27.5" (700 mm) standover for DH02 :brows:
     
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  14. jackalope

    jackalope Mental acuity - 1%

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    I'm sorry, but I'm still in stitches about that video Giant put out...

    Now that I got that out of my system, the proposed gravity chariot looks fantastic. Can't wait to see the finished product.
     
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  15. djjohnr

    djjohnr Turbo Monkey

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    5'10" w/ 31" inseam. The medium SB-75 w/40mm stem I just built is the first bike I've been on where the cockpit feels absolutely perfect. None of my previous XC/Trail/FR/AM/DH bikes have ever achieved that. I with it had 17" stays though, as I've found that to be the goldilocks length.
     
    #15 -   Feb 24, 2015
    Last edited: Feb 24, 2015
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  16. kidwoo

    kidwoo Celebrating No-Pants Day

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    That high pivot horst looks like it will have a lot of antisquats.

    Have you counted the antisquats yet?

    That would be sweet if you can get that frame weight.
     
  17. troy

    troy Monkey

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    It haz teh antisquatz yet still no pedal feedbackz.

    Did some adjustments to the AS curve. It has a little more AS now and pedal kickback ~2.5 deg at 36/16
     
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  18. tacubaya

    tacubaya Monkey

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    I demand leverage ratio graphs drawn with a crayon and an explanation of why the linkage would've been chosen by Jezuz.
     
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  19. jstuhlman

    jstuhlman We noticed.

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    chozen by jezuz...becauze gawdlike
     
  20. jackalope

    jackalope Mental acuity - 1%

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    The new DH02, offering an unique "cross" shaped axle path via the Jesus Link ™ and hydrophobic kinematics. It's so good, it can turn fish into wine...or something like that.
     
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  21. Mo(n)arch

    Mo(n)arch Turbo Monkey

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    Looks like a Ghost:


    :D

    Seriously thoug, looks great!

    Edit: Klick on the pic to see nice pic. PNG files causing problems?
     
    #21 -   Feb 25, 2015
    Last edited: Feb 25, 2015
  22. troy

    troy Monkey

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    penis.jpg

    So there is a typo, I ment SAG point ofc. But leverage ratio looks kinda like this. As You can see the further You go through the travel, the more efficient it is, or smthn like this...

    Above the 0% is a happy place for some nomads or some other guys from the desert or something...

    Below the +100% zone is for giant bikes only. 100% efficient all the time bro.

    Actualy it turns fish into bacon.
     
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  23. sikocycles

    sikocycles Turbo Monkey

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    Make that in a 29er
     
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  24. Sandwich

    Sandwich Pig my fish!
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    5'11", prefer a large Yakuza for fit, love my enduro 29er, though it's not a DH bike. Prefer a longer reach with a shorter stem, like a 35mm.
     
  25. StiHacka

    StiHacka Compensating for something

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    That's a fairly ballsy design. Perhaps a bit on the stiff side?
     
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  26. troy

    troy Monkey

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    It is stiffer, harder and comes faster to the finish line.
     
  27. djjohnr

    djjohnr Turbo Monkey

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    How about end-stroke clearance?
    Mud guard necessary?
     
  28. troy

    troy Monkey

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    There is enough space for the resi. I dont think mud guard is necessary. Those tubes between upper and the main pivot are protecting the shock from mud and debris.
     
    #28 -   Feb 25, 2015
    Last edited: Feb 25, 2015
  29. djjohnr

    djjohnr Turbo Monkey

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    Sorry, my questions were in no way serious.
     
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  30. troy

    troy Monkey

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    I spent last hour wondering if this question is serious or not hahahaha. Fkin solidbike thread and its mud guard, resi protection debate...
     
  31. Vrock

    Vrock Linkage Design Blog

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    That's a really nice bike!!! But CS Should be 16.9 around Sag, try to go as short as possible because it grows a lot along the travel.
     
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  32. Westy

    Westy the teste

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    Will there be a freeride version?
     
  33. troy

    troy Monkey

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    It is 17.7 @SAG so just like any other dh frame on the market or even a tad shorter. Many dh frames have static cs lenght 17.3". With 16.9" at sag I would have to make a 16.14" CS and just not very likely to happen. 1st of all, there would be no space for a chainstay bridge so thats a no no unfortunately. I will think of reducing it to 16.7" (425), but again, mud clearance would be compromised.

    I am working on a simple single pivot dh/parkbike. In terms of leverage ratio it is very simmilar to IH yakuza kumicho, but with modern geo and different pivot placement for better breaking characteristics and square edge bumps compliance. You can put there a shorter e2e shock and have 6.3" (160mm) miniDH ripper
    1_1.png 2_2.png
     
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  34. Sandwich

    Sandwich Pig my fish!
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    I'd prefer the length @ sag to be around 17.3, but that's just me. As far as mud goes, you should only have a problem when the bike is in the air, in theory, and then the stays will pull away from the BB and such....but I think that's kind of splitting hairs.
     
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  35. iRider

    iRider Turbo Monkey

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    OK, this is where the harder, faster, stronger comes from. :)

    I was wondering about the head tube/downtube interface, especially with the curved downtube. Don't you think this construction will cause the frame to flex under heavy braking? Maybe use a straight tube and only bend it at the BB to make room for the shock? The you could, if needed, strengthen the area with a gusset too.

    FWIW: Ghost will drop this type of design for next year. New bike should employ the riot link. Marketing or real performance improvement?
     
  36. rpet

    rpet Turbo Monkey

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    6', ride a medium Tr450. Would have a L if I lived on west coast, probably.

    nice proto bro
     
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  37. MmmBones

    MmmBones Monkey

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    That single pivot looks like a ripper. I would imagine it will go over well with the freeride crowd as it's steel and has multiple places to stash the weeds. Seriously doe, I would love this kind of bike for everything I don't need my trail bike or DH bike for. DH02 looks awesome too, I'd hit both with a 49-50cm reach please.
     
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  38. jstuhlman

    jstuhlman We noticed.

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    BROTOTYPE
     
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  39. troy

    troy Monkey

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    How tall are You???
     
  40. MmmBones

    MmmBones Monkey

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    I'm 6'5"