Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7
  1. #1
    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)

    Would a non-ramped chainring help?

    Hey guys. Gonna bother you with another question.

    I run a 1x9 setup. It used to be 3x9. I have the 32 ring up front that came with the bike (granny and titan gear removed). I have a bashring on it now, and use my FD as a chain guide.

    When I'm in the 34 or other large cog at the back, I sometimes drop the chain, always inside.

    Ideally, I'd like to removed the FD and just run a nice and tidy 1x9 setup. I am wondering if a non-ramped ring would help me out here. I was reading up on Sheldon Brown's 2 cents on ramped rings, and I came across this:

    "Ramped/pinned chainrings generally give improved shifting when moving from smaller to larger chainrings. The ramps and pins are always located on the side that faces the next smaller chainring. Ramps and pins are useless on the smallest chainring of a crankset, so they are normally found only on the outer rings."


    Source: http://www.sheldonbrown.com/gloss_ra-e.html

    It's interesting that it improves shifting up the gears, and yet ramps are not found on the smallest ring, but are on the largest?

    Anyways, what do you think?

    Thanks!
    -- Zan

    "Every dog needs a squeak toy."

  2. #2
    Senior Member deraltekluge's Avatar
    Join Date
    Sep 2006
    My Bikes
    Kona Cinder Cone, Sun EZ-3 AX
    Posts
    1,195
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It's interesting that it improves shifting up the gears, and yet ramps are not found on the smallest ring, but are on the largest?
    They help get the chain to the ring where they're located from the smaller ring. There's nothing smaller than the smallest, so they wouldn't do anything there.

  3. #3
    Senior Member TimJ's Avatar
    Join Date
    Sep 2005
    Posts
    1,958
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Zan View Post
    Hey guys. Gonna bother you with another question.

    I run a 1x9 setup. It used to be 3x9. I have the 32 ring up front that came with the bike (granny and titan gear removed). I have a bashring on it now, and use my FD as a chain guide.

    When I'm in the 34 or other large cog at the back, I sometimes drop the chain, always inside.

    Ideally, I'd like to removed the FD and just run a nice and tidy 1x9 setup. I am wondering if a non-ramped ring would help me out here. I was reading up on Sheldon Brown's 2 cents on ramped rings, and I came across this:

    "Ramped/pinned chainrings generally give improved shifting when moving from smaller to larger chainrings. The ramps and pins are always located on the side that faces the next smaller chainring. Ramps and pins are useless on the smallest chainring of a crankset, so they are normally found only on the outer rings."


    Source: http://www.sheldonbrown.com/gloss_ra-e.html

    It's interesting that it improves shifting up the gears, and yet ramps are not found on the smallest ring, but are on the largest?

    Anyways, what do you think?

    Thanks!
    Yes, it might help, because a ss ring would have teeth all the same height. Rings w/ ramps and pins also have shorter teeth in places. It could be that the chain is coming off at those points. You might be able to tell if that's the case by testing it out.
    fun facts: Psychopaths have trouble understanding abstract concepts.
    "Incompetent individuals, compared with their more competent peers, will dramatically overestimate their ability and performance relative to objective criteria."

  4. #4
    Senior Member
    Join Date
    Aug 2009
    Location
    North of Boston
    My Bikes
    Kona Dawg, Surly 1x1, Karate Monkey, Rockhopper, Crosscheck , Burley Runabout,
    Posts
    2,062
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    How's your chain length? See if you can move your chain ring to the left. They make downhill guides that are like a bashguard on both sides of the chainring to keep it from faling off.

  5. #5
    all-weather commuter
    Join Date
    Mar 2009
    Location
    Rochester, NY
    My Bikes
    Graham Cycles Kilo-Graham all season fat bike, and a few others
    Posts
    313
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Put the granny ring back on to catch the chain when it falls off, then you can put it back at your convenience. (:

  6. #6
    Te mortuo heres tibi sim? scrublover's Avatar
    Join Date
    Aug 2004
    Location
    East coast
    My Bikes
    hardtail, squishy, fixed roadie, fixed crosser
    Posts
    3,486
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yes. Even better, is this.

    http://www.gvtc.com/~ngear/whatis.html

    Ditch the front mech for one of those. Replace your ramped ring with an unramped when it dies.
    I believe the clouds in my coffee more than the weatherman on t.v.

  7. #7
    Senior Member JonathanGennick's Avatar
    Join Date
    Apr 2007
    Location
    Munising, Michigan, USA
    My Bikes
    Hifi 29er, Stumpy 29er, Rockhopper 29er, ...
    Posts
    1,762
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I run 1x9 on one of my bikes. I run a Race Face downhill ring, which has no shaping of the teeth. It's just a plain old ring.

    I also run an MRP 1.x chainguide. I would have just locked down a front derailleur, but the bike was not designed for one, and did not have clearance for one.

    I briefly experimented running without a guide, but even with a plain old ring it is too easy for me to nudge the chain off with just a small bit of finger pressure. So I put on the guide and have been happy ever since.

Posting Permissions

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