Advertise on Bikeforums.net



User Tag List

Results 1 to 13 of 13
  1. #1
    Newbie
    Join Date
    Jun 2009
    Posts
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Plastic disk between cassette and spokes

    What is the plastic disk between cassette and spokes called? Is it a required component? Mine has become gummy and nasty and I would like to remove it.

  2. #2
    Packfodding 3 caloso's Avatar
    Join Date
    Jul 2002
    Location
    Sacramento, California, USA
    My Bikes
    Ridley Excalibur, Gazelle Champion Mondial, On-One Pompino, Specialized Rock Hopper
    Posts
    30,310
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It's known as a dork disc, a pie plate, or a spoke protector. If your rear derailleur inner limit screw is properly adjusted, you don't need it. The proper way to get it off is to take the wheel out and remove the cassette (you'll need a chain whip, the appropriate cassette tool, and a wrench or vice grip to hold the cassette tool).

    Or you can just hack it off with pruning shears, the way I did before I got the proper tools mentioned above.
    Cyclists of the world, unite! You have nothing to lube but your chains!

  3. #3
    Newbie
    Join Date
    Jun 2009
    Posts
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by caloso View Post
    It's known as a dork disc, a pie plate, or a spoke protector. If your rear derailleur inner limit screw is properly adjusted, you don't need it. The proper way to get it off is to take the wheel out and remove the cassette (you'll need a chain whip, the appropriate cassette tool, and a wrench or vice grip to hold the cassette tool).

    Or you can just hack it off with pruning shears, the way I did before I got the proper tools mentioned above.
    Thanks - I've been wanting to get rid of that thing for a while now

  4. #4
    Zan
    Zan is offline
    Senior Member Zan's Avatar
    Join Date
    Oct 2007
    Location
    Waterloo, ONT
    My Bikes
    Road: Trek 1.5 (2007). Mountain: Santa Cruz Chameleon (2008). Beater: Peugeot Recorde du Monde (1850)
    Posts
    1,417
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    lol, dork disc.

    +1 to caloso.
    -- Zan

    "Every dog needs a squeak toy."

  5. #5
    Advisor
    Join Date
    Mar 2008
    Location
    Central New Jersey
    Posts
    544
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If your rear derailleur is improperly adjusted and you don't have that disc, when shifting to the largest cog, the chain will go up and over the gear and into the spokes.

  6. #6
    Senior Member mzeffex's Avatar
    Join Date
    Mar 2009
    Location
    Fort Collins, CO
    My Bikes
    2011 S-works Tarmac SL3 Red, 2009 Fuji SLM 2.0 XT, 1986 Lotus Grand Prix Luxe Dura-Ace, 2012 Blue Norcross, Torelli Tipo Uno, Giant Anthem X2
    Posts
    8,063
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Okay, you said if your derailleur is adjusted properly it isn't necessary, well, even if it is off and you have the dork disc, it will work its way over and into the spokes anyways. Murphy's law.
    Quote Originally Posted by rjones28 View Post
    Are they talking about spectators feeding the cyclists? You know, like don't feed the bears?

  7. #7
    Throbbing Member
    Join Date
    May 2008
    Posts
    26
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'd rather have a dork disc than have the chain tear out my spokes in the middle of traffic. Granted, you're probably going slow when this would become a problem, but it could be an expensive problem and still possibly dangerous. My derailleur is properly adjusted and I check it routinely. But I still keep the dork disc in place. But to each their own, if you're more concerned about what some elitist Fred may think about you rather than getting yourself mangled, by all means, take it off.

    "it's an imperfect world, screws fall out all the time"

  8. #8
    Senior Member mzeffex's Avatar
    Join Date
    Mar 2009
    Location
    Fort Collins, CO
    My Bikes
    2011 S-works Tarmac SL3 Red, 2009 Fuji SLM 2.0 XT, 1986 Lotus Grand Prix Luxe Dura-Ace, 2012 Blue Norcross, Torelli Tipo Uno, Giant Anthem X2
    Posts
    8,063
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    ^ it will not keep your chain from going into the spokes. It just makes an annoying noise, then does it anyways.
    Quote Originally Posted by rjones28 View Post
    Are they talking about spectators feeding the cyclists? You know, like don't feed the bears?

  9. #9
    Great State of Varmint Panthers007's Avatar
    Join Date
    Sep 2008
    Location
    Dante's Third Ring
    Posts
    7,481
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    You should also check your derailleur-hanger's alignment - or have a bike-shop check it and put it in good order if it's off. This will help cut down the possible odds of your chain and/or derailleur ending up in the spokes.
    How do you keep an idiot in suspense?

  10. #10
    BikeNewbie stark23x's Avatar
    Join Date
    May 2009
    Location
    Hamden, CT USA
    My Bikes
    2009 Giant Defy 3, 1983 Trek 850, 2008 Schwinn Sidewinder
    Posts
    132
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Mine got chewed up and then started click-click-click against the spokes one day when I was a few miles out from home. I pulled out the multitool and stabbed it with the flathead screwdriver in a line, then tore it off. I wanted to throw it down in a huff, but I try to take my garbage home, so I folded it up and stuck it in the seat bag.

    Stupid dork disc. Who thought soft nylon was a good idea?
    JimK
    MadeofAwesome.net
    2009 Giant Defy 3, 1983 Trek 850, 2008 Schwinn Sidewinder
    Eternal vigilance is the price of butter.

  11. #11
    Senior Member
    Join Date
    May 2004
    Location
    Wilmington, DE
    My Bikes
    2003 Specialized Hardrock, 2004 LOOK KG386i, 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1
    Posts
    8,851
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Whatever you do, don't try to burn it off: I set my rear wheel on fire

    I love that thread.

  12. #12
    Senior Member
    Join Date
    Aug 2006
    Location
    Perth, W.A.
    Posts
    941
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by joejack951 View Post
    Whatever you do, don't try to burn it off: I set my rear wheel on fire

    I love that thread.

    Thanks for that link. Made my lunchtime.

  13. #13
    Senior Member
    Join Date
    Oct 2007
    Location
    Québec, Québec, Canada
    My Bikes
    Fuji Touring 64cm, Peugeot Canada PB-18 61cm and winter beaters
    Posts
    225
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Ph00ls! The american government has made it quite clear that these life-saving devices should be mandatory on all bikes!

    I distinctly remember reading a CPSC recall order that said something like "there is no dork disc on such bike model, please return to the bike dealer to have one installed at once!"

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •