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  1. #1
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    Dual Suspension Chinese Carbon 29er

    As reported by Beig in the original Chinese Carbon 29er thread, Hong Fu have a 29er Carbon Duallie posted on their site.

    Jenny has been contacted asking for geo details and a few other bits of info.

    Thought this was worthy of a thread of its own rather than caught up in the original one.

    Hong Fu

    Last edited by emu26; 09-13-2011 at 10:50 PM.

  2. #2
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    Hong Fu you, pal!

  3. #3
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    Wow, that looks a lot like the new Scott spark 29er frame. I mean a lot. If it is under 1K, may be worth a purchase and build up.

  4. #4
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    Quote Originally Posted by juan_speeder View Post
    Hong Fu you, pal!
    Quote Originally Posted by Stryder75 View Post
    Wow, that looks a lot like the new Scott spark 29er frame. I mean a lot. If it is under 1K, may be worth a purchase and build up.
    sensational. Intelligent, informative first reply and it only took to the second reply to get a "that looks alot like a ...." comment

  5. #5
    Former Bike Wrench
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    and the geometry is...

  6. #6
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    Quote Originally Posted by mtnbiker72 View Post
    and the geometry is...
    Still waiting for a reply from Jenny. I will post up as soon as I get it as I am sure the others that have already asked for it will as well.

  7. #7
    workin' it Administrator
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    The other photo on the site looks weird. How do those CS pivots work?

    Try this: HTFU

  8. #8
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    Response will probably come after 9pm EST since that's when they will be beginning their work day.

  9. #9
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    Quote Originally Posted by Stryder75 View Post
    Wow, that looks a lot like the new Scott spark 29er frame. I mean a lot. If it is under 1K, may be worth a purchase and build up.
    i agree, i mean most 29 fuax bar frames look similar but those are the same drop outs.

  10. #10
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    Assuming these don't come with a shock, I'm curious how they're going to compare cost wise with the name brand frames. I feel like the markup on a retail shock is considerably more than what it adds to the price of a frame when sold as a set.

  11. #11
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    Well said the rear shock prices retail is just stupid high compared to a frameset. That said with the HT running about $400 if the FS can come in under $700 or so it would be worth it. But if your looking at over $1k with a rear shock their are other options like a spearfish.

  12. #12
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    Seat stays at the pivot look suspect IMHO, would like to see a bit more material there.

  13. #13
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    Also would need to know what shock tunes work well with the frame.

  14. #14
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    Will replacement bearings be available? Pretty important.

  15. #15
    FIRENZE rulez !!
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    i asked to Jenny price.

    800 usd for a single frame, 100 usd to be shipped in Italy

  16. #16
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    did she give you geo charts? I haven't had any response back yet

  17. #17
    FIRENZE rulez !!
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    Quote Originally Posted by emu26 View Post
    did she give you geo charts? I haven't had any response back yet
    i was with her on skype few minutes ago, now she's offline

    she told me the price

    asked some technical informations too ( eye to eye distance, rear skerwer ... )

    but no reply to my questions...

    i am not sure to stay a lot on my Mac this morning to wait for her ...

  18. #18
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    165mm eye to eye

    1950 g the weight in 17,5"

    rear skewer 135mm not 142 , as you can see on picture ( normal mtb )
    Attached Thumbnails Attached Thumbnails Dual Suspension Chinese Carbon  29er-hungfu.jpg  


  19. #19
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    I have thought about getting a Chinese 26er dually in the past but haven't been able to find any reviews. I have a Chinese carbon 26er hardtail and love it, stiff and quick through single track and gets more time than my dually Santa Cruz. But hardtails are relatively simple and how the geometry affects the ride is well known (at least with 26ers). Is a dually 29er from Hongfu et.al. going to compare favorably to name brands as their hardtails do? Hope so, kudos to whoever dives in. Shame only available in 17.5 - too big for me but Looking forward to any further information or pictures/reviews.

  20. #20
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    There website lists 15.5" / 17.5" / 19.5" / 21.5", so I'm guessing others are available or soon will be.

    My issue is still cost/risk. Like you mentioned, with a hardtail you kind of know what you're getting. I'm pretty tempted to go for a carbon 29er this winter.

    On a FS bike I'm with subspd in using the Spearfish as a benchmark:
    $1000
    5.5 lbs = 2495 grams (I assume this includes shock)
    Warranty & crash replacement

    VS:
    $800 + $??? for shock
    1950g + ~200g for shock = 2150
    Likely stiffer than a Spearfish
    No warranty or crash replacement

    That's not compelling enough for me.

  21. #21
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    What is the travel on these? 100mm?

  22. #22
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    so 800usd and you have to buy a shock???

  23. #23
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    Not such a good deal at $800.

    FS is a more complex bike purchase in general.

    With that said, I'm really liking my Ltk023 HT.

  24. #24
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    Calculating travel?

    Can anyone with a good knowledge of shock specs explain the influence of stroke on travel? It's easy to find a shock which is 165mm eye to eye, but stroke (travel?) differs from 37.5- 50mm. Presumably a longer stroke means longer travel, but it must depend on frame geometry. Am I on the right track?

  25. #25
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    Jenny finally got back to me. This frame almost strikes me as being rushed. They only have 17.5 avalible right now, and none of my questions that were specific to this frame were answered. She then asks me how many I would be interested in.

    hmm...still (one of the few) very happy with my hong fu hard tail frame.

  26. #26
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    Any information when the other size frames will be avail?

  27. #27
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    This looks sweet... Might tide me over until the Scalpel arrives.

  28. #28
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    Price for a qty. Of 10 is 650 per plus 120 shipping for each. Thought you all should know that there is a bulk discount. Unless... anyone else get a quote yet? I remember the shipping on my hardtail being cheaper. Anyone get a differentko quote for shipping?

  29. #29
    Superflying on Haven
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    Not such a good deal at $800.
    A Superfly 100 chainstay is $700... $800 is a joke... and a threat to your life...

  30. #30
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    Haha, that's hilarious. Trek would never overcharge on spare parts would they!!!!

  31. #31
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    Quote Originally Posted by rularn View Post
    Any information when the other size frames will be avail?
    "next month" was Jenny's response, and that was one of the few questions she answered

  32. #32
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    Quote Originally Posted by vierzwanzig View Post
    They only have 17.5 avalible right now, and none of my questions that were specific to this frame were answered. She then asks me how many I would be interested in.
    There is no frame available yet, no geometry and no other specs. At present this is purely an exercise in gauging interest to see if it is worthwhile to design and manufacture.

  33. #33
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    Quote Originally Posted by Menzo View Post
    A Superfly 100 chainstay is $700... $800 is a joke... and a threat to your life...
    To be fair, I haven't heard of anyone getting injured when their frame cracks, so calling the Superfly a "threat to your life" might be a bit over the top.

  34. #34
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    Quote Originally Posted by topmounter View Post
    To be fair, I haven't heard of anyone getting injured when their frame cracks, so calling the Superfly a "threat to your life" might be a bit over the top.
    I think the point that Menzo is making is that with Trek charging $700 for a chain stay, $800 is cheap for a complete frame and probably so cheap that the quality will be questionable and possibly life threatening should you have a catastrophic failure of the $800 frame.

  35. #35
    FIRENZE rulez !!
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    someone asked if UD finish is available soon ?

  36. #36
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    Quote Originally Posted by tumble_downs View Post
    Can anyone with a good knowledge of shock specs explain the influence of stroke on travel? It's easy to find a shock which is 165mm eye to eye, but stroke (travel?) differs from 37.5- 50mm. Presumably a longer stroke means longer travel, but it must depend on frame geometry. Am I on the right track?
    I'm not aware of any 165mm shock with a stroke different from 37.5.Care to enlighten me?

  37. #37
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    It certainly LOOKS very good!

  38. #38
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    29er full suspension carbon frame products, buy 29er full suspension carbon frame products from alibaba.com

    Looks like the head tube angle is 71 wonder what this frame would be like with a 120mm fork? Anyone able to tell from the diagram above what the stand over is on this? I do find it interesting now that they offer a 2year warranty on the frame.

    Couple more pics

    [IMG]

  39. #39
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    bump...

  40. #40
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    Well, the frame is "designed" with a 120mm vork in mind. It seems very "inspired" by the Specialized Epic construction.

    But do not forget:
    1. You need a Shock with the correct Compression- and Reboundtune.
    2. The pivotbearings are quite unknown.
    3. There is no through-axle in the rear triangle, which will probably lead to a flexy rear-end.

  41. #41
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    I thought the same thing about the Epic inspiration when I saw the drawing since I ride one.

  42. #42
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    If the 29er frame I'm getting in a week or so is up to par I'll order one of these and build it up too.

  43. #43
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    I'm watching this close too I think this would be a fun build. BUT it's a hard sell compared to what a spearfish built costs that weighs the same.

  44. #44
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    Looking for some shock advice

    I have a compadre looking at this frame as a winter project/experiment. We're looking at using an rt3. Does anyone have an idea about which tune would be optimal? Is it based on rider weight, or does frame leverage play a role? My prior would be to go with a mid-tune.

    TIA

  45. #45
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    It's selected based on the leverage ratio of the frame. You'll have figure out the leverage ratio and then talk to SRAM about which one would work best. Personally, I'd ask Push if they can sort out a correct custom tune off of the drawing (I would imagine "yes"). The cost of a custom RT3 through Push is pretty reasonable. I'm also of the opinion that the shock completely makes or breaks the performance of a faux bar frame.

  46. #46
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  47. #47
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    Put this together because I was bored I had to scale some of the pivot dimensions off of the pdf, so this may not be entirely accurate. It appears to have 110mm of travel for a 1.5" shock stroke. I'm not familiar enough with MTB shocks to know which tune would best suit this, but the graph should be enough for someone with knowledge to make a recommendation.
    Attached Thumbnails Attached Thumbnails Dual Suspension Chinese Carbon  29er-hongfu.jpg  


  48. #48
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    This may help

    This chart has been posted elsewhere



    I read the data off the plot and put together the leverage ratio v wheel travel plot.


    It seems as if this is a falling rate shock. I'm not sure how to determine the leverage ratio to use for selecting the tune, but a somewhat educated guess is that it would be the y-intercept of the plot. In this case 2.5. If that's correct then we're looking at a rt3 mid-tune.
    Attached Thumbnails Attached Thumbnails Dual Suspension Chinese Carbon  29er-leveragevtravel.jpg  


  49. #49
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    Thanks for posting that. I'm guessing you'd want to pick a tune based on the average leverage ratio more so than the zero intercept of the line. This frame will have a leverage ratio of 3 at 35% stroke, which is where your suspension will be spending most of its time. I would think it to be firmly in the "C" category based on that line of thinking.

  50. #50
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    Thanks car-nut I needed that info

    I am far from a suspension expert. I'm just trying to spec the build for my buddy.

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