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Front derailleure on a Demo 7- can it be done?

Discussion in 'Downhill & Freeride' started by Jman, Feb 10, 2008.

  1. Jman

    Jman Chimp

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    Heya,
    Any of you Demo7 monkeys out there ever built a front derailleure on it? I can't get the local dealer to tell me whether or not it can be done.
    If you done it, which ft derailleure system did you use?

    Cheers
     

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  2. spocomptonrider

    spocomptonrider sportin' the CROCS

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    I don't think it is possible just due to all of the linkage that is right where the der would need to be ran. IMHO for what its worth.
     
  3. pdawg

    pdawg Monkey

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    It won't fit.
     
  4. RideRMB

    RideRMB Monkey

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    That's what she said!





    Sorry I had too. :poster_oops:
     
  5. TWeerts

    TWeerts Monkey

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    it might work with an e type derrailleur
     
  6. Summit

    Summit Monkey

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    It works just fine...don't need an e type.
     
  7. pdawg

    pdawg Monkey

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    Interesting. Do you have any pics? Where does the derailleur clamp onto without having a lower seat tube?
     
  8. RideRMB

    RideRMB Monkey

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    It can't work unless you bend the Der. clamp.

     
  9. HenryTheHammer

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    It can be done.

    Mounts on the vertical tube at the front of the rear triangle.

     
  10. Summit

    Summit Monkey

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    Nice setup Henry. Is that a Blackspire Stinger? Gotta get me a double ring chainguide ASAP for mine.
     
  11. Slater

    Slater Monkey

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    The bike posted above is mine.

    Regular bottom pull XT derailleur.

    Worked just as well as any other front derailleur setup I've had. The only problem is that the cable would hang down quite a ways as a result of the travel. Since the derailleur is mounted on the linkage, it rotates up around the bb, pulling the cable. When you return to your sagged travel, there is excess cable hanging under the BB. It never got caught on anything, but I wonder if it would have sooner or later.

    I've since taken it off because I can hike up anything I ride just as fast if not faster than I could pedal up it in the small gear. And I enjoy the scenery more when I hike.

    Yeah that was a blackspire stinger. With that and the derailleur I never dropped the chain.

    Hope this helps.
     
  12. kidwoo

    kidwoo Celebrating No-Pants Day

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    Jesus christ there are some knowledgeable people posting here.


    Yes you can put a front derailleur on a demo. You don't need to bend anything and it's a standard clamp, top swing, bottom pull derailleur.

    Thank you slater.
     
  13. Slater

    Slater Monkey

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    haha yeah, it must have been a slow day on pinkbike, knowledgable people coming out of the woodwork.
     
  14. RideRMB

    RideRMB Monkey

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    :disgust1:
     
  15. Jman

    Jman Chimp

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    Thanks for all your inputs. You guys choice :thumb::thumb::thumb:
     
  16. mr-drew

    mr-drew Chimp

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    hey quick question, what is the weight on a demo frame
     
  17. pdawg

    pdawg Monkey

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    My local Specialized dealer gave me some bad info... sorry to propogate this. :disgust1:

    Curious that Specialized does not disclose this hidden feature "FD compatibility" on their product pages for those that want to have a 40 pound epic trail bike.
     
  18. Slater

    Slater Monkey

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    I find this odd too.

    Especially since they took the time to put a cable guide on there. So they definitely thought it out and made it to be used with one if desired.

    My Large D7 frame weighed in at almost exactly 11.5 lbs with a DHX and steel spring.

    The only problem for the D7 being an epic trail bike is the interrupted seatpost. You can only raise it like 3". If your post is short enough for real steep stuff it surely will not be long enough to climb with. Telescoping seatpost is an option but quite heavy. Oh and they don't pedal.

    The longer I've had mine the more I've come to realize it really was designed for lift/shuttle assisted freeride/dh riding.

    Luckily for me this works fine because I'm evolving into only really liking riding like that.
     
  19. 4130biker

    4130biker PM me about Tantrum Cycles!

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    Just a quick note: a front der. can also be run on the new demo 8's.
    The only thing it lacks are cable guides on the downtube. mine works great with a deore front mech, and a stinger chain tensioner with a 22-36 combo. Never lose my chain and i have the option to pedal up if I choose!
     
  20. Summit

    Summit Monkey

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    I'll second that...cut my post down enough to really slam it and I don't have enough left to get proper extension. I can still pedal it, but it's not exactly good for my knees. I've considered getting another post w/ a different saddle that I can cut longer and just swap them out depending on the type of ride I'm doing.
     
  21. Boxxer

    Boxxer Monkey

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    Thats what I did.:monkeydance: