Advertise on Bikeforums.net



User Tag List

Results 1 to 13 of 13
  1. #1
    Senior Member ronbridal's Avatar
    Join Date
    Mar 2004
    Location
    Illinois
    Posts
    524
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Single Chainring Up Front

    If you were going to run a single chainring, what would you use? I think I am going to run a 42, with a larger chainring (46) ground down to act as a chain guard. I will also have a plastic chain guard thing (whatever it is) on the seat tube. What do you think?

  2. #2
    Senior Member ApolloCVermouth's Avatar
    Join Date
    Jul 2005
    Location
    Toronto
    My Bikes
    homemade cyclocross, 2005 KHS Flite 100 frame + assorted parts
    Posts
    140
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thats exactly what I use. Works perfectly.

  3. #3
    I couldn't car less. jeff williams's Avatar
    Join Date
    Nov 2003
    My Bikes
    Ritchey P-series prototype, Diamondback, Nishiki Triathelon Pro.
    Posts
    4,404
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Check your clearance for the ring and chainstay.
    The ring should be sandwiched between an inner and outer plate or a boomerang\guide tensioner used to stop chaindrop.

    I XC and stuff using a 38T ring -11\30 cluster witha tensioner. Nice.
    Not sure it would give you an edge racing, but it is a bike mod I've really taken to on my mtb.
    Attached Images Attached Images

  4. #4
    Junior Member
    Join Date
    Oct 2005
    Posts
    18
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    my surly's set up 1x8 like that now, I don't have a jump stop on the inside though. just the 42t ring and a ground down outer ring serving as a chain guard. been running it like that since the beginning of this 'cross season, no dropped chain yet. I miss the big ring when I use it on the road though, so it'll be sporting a frt derailer again in short order.

  5. #5
    I couldn't car less. jeff williams's Avatar
    Join Date
    Nov 2003
    My Bikes
    Ritchey P-series prototype, Diamondback, Nishiki Triathelon Pro.
    Posts
    4,404
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by jittery
    my surly's set up 1x8 like that now, I don't have a jump stop on the inside though. just the 42t ring and a ground down outer ring serving as a chain guard. been running it like that since the beginning of this 'cross season, no dropped chain yet. I miss the big ring when I use it on the road though, so it'll be sporting a frt derailer again in short order.
    Does your cluster have an 11T cog? Swapping 12-11 can be a fix...or not.

  6. #6
    Member B-rizzle's Avatar
    Join Date
    Jan 2005
    Location
    Ohio
    My Bikes
    Santa Cruz Chameleon/Giant XTC
    Posts
    49
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You could just run a single in the front and the back, that way there is no way for the chain to jump off or make noise.

  7. #7
    Dude who rides bike BikeInMN's Avatar
    Join Date
    May 2003
    Location
    U S of A
    Posts
    626
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I run a single 42 front with a 12/25 or 12/27 9 speed rear cassette depending. I only lost the chain once all season and it was due to taking a digger on a wicked run-up. An outer guard with a 3'rd eye chain keeper should be all you need.

  8. #8
    *pista* jayfitzgerald's Avatar
    Join Date
    May 2005
    Location
    NYC
    Posts
    30
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by BikeInMN
    I run a single 42 front with a 12/25 or 12/27 9 speed rear cassette depending. I only lost the chain once all season and it was due to taking a digger on a wicked run-up. An outer guard with a 3'rd eye chain keeper should be all you need.
    That's the way to do it: 42 front, 12/27 rear, with the required 3rd eye chain keeper (don't forget this part) and bob's your uncle.

  9. #9
    Vanned. worker4youth's Avatar
    Join Date
    Jul 2005
    My Bikes
    2006 Motobecane Le Champ SL, 2006 Mercier Kilo TT, 2004 Gary Fisher Tassajara
    Posts
    1,244
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Why not keep the 46T as is, and manually shift the front chainrings. For instance, if the course is relatively flat, and you're looking for more speed, you can manually put the chain on the 46T. All other times, you can leave in on the 42T.

  10. #10
    I couldn't car less. jeff williams's Avatar
    Join Date
    Nov 2003
    My Bikes
    Ritchey P-series prototype, Diamondback, Nishiki Triathelon Pro.
    Posts
    4,404
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by jayfitzgerald
    That's the way to do it: 42 front, 12/27 rear, with the required 3rd eye chain keeper (don't forget this part) and bob's your uncle.
    'cept you still have to get off your bike and put your chain back on.
    I use a dual roller guide\ only lower pulley.
    Attached Images Attached Images

  11. #11
    I couldn't car less. jeff williams's Avatar
    Join Date
    Nov 2003
    My Bikes
    Ritchey P-series prototype, Diamondback, Nishiki Triathelon Pro.
    Posts
    4,404
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    No I don't CX, just XC.
    Disclaimer!

  12. #12
    wonderer, wanderer gonesh9's Avatar
    Join Date
    Mar 2003
    Location
    portland, or
    My Bikes
    surly crosscheck, yeti 575, salsa moto rapido, kona ute
    Posts
    1,712
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I've heard of people using a front deraileur mounted on without any cables, and cut shorter to act as a chain guard.

    cross crusade forum topic on single ring setup

  13. #13
    Tiocfáidh ár Lá jfmckenna's Avatar
    Join Date
    Dec 2003
    Location
    The edge of b#
    My Bikes
    A whole bunch-a bikes.
    Posts
    5,410
    Mentioned
    0 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by gonesh9
    I've heard of people using a front deraileur mounted on without any cables, and cut shorter to act as a chain guard.

    cross crusade forum topic on single ring setup

    I did this for years and it works great. Just drop the deraillure down real low. I also flared it out a bit to allow for the 1'st and 8th speed chain line.



    Quote Originally Posted by worker4youth
    Why not keep the 46T as is, and manually shift the front chainrings. For instance, if the course is relatively flat, and you're looking for more speed, you can manually put the chain on the 46T. All other times, you can leave in on the 42T.

    This is really not a bad idea.

    ---

    The third eyes or dog fangs will fail on you I garuntee it. The chain squeezes between the plastic and the chain ring and drops to the BB and then you need a tool to loosen the dog fang to retrieve your chain. It sucks. It happened to me once and it was enough for me to never use one again.

Posting Permissions

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