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Going from 1 x to 2 x

Discussion in 'The Shop' started by johnbryanpeters, Feb 2, 2017.

  1. johnbryanpeters

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    I'm tired of the 1 x 11 drive train on my T275 and want to go to two rings and a derailleur in front (gasp...); the frame has a mounting boss for a front derailleur. Has anyone been through this exercise?

    I'm looking for real world experience, suggestions, and am ready to endure the inevitable harassment.
     
    #1 -   Feb 2, 2017

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  2. slimshady

    slimshady Turbo Monkey

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    Seriously, you won't have any issues. Might just have to take a look at your chain line, but that's it.

    EDIT: Sorry, I thought you had a Shimano transmission. SRAM RDs won't work with two front rings.
     
    #2 -   Feb 2, 2017
    Last edited: Feb 2, 2017
  3. StiHacka

    StiHacka Compensating for something

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    Shimano or SRAM drivetrain? Btw. I found 2x to be the most finicky setup from the chainline and chain retention POV. Both 3x and 1x are much easier to make work.
     
    #3 -   Feb 2, 2017
  4. johnbryanpeters

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    SRAM

    X01 XG-1195 X-DOME 11 speed, 10 x 42 tooth cassette, 32 tooth ring

    GXP cranks and bottom bracket
     
    #4 -   Feb 2, 2017
  5. StiHacka

    StiHacka Compensating for something

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    I have a 2x gxp spider for the SRAM cranks, I think. Let me know if you need one.
     
    #5 -   Feb 2, 2017
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  6. Adventurous

    Adventurous Turbo Monkey

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    May I ask why?

    I've been through this exercise several times over the past couple of years here in CO, though it was flipping between 1x9 and 2x9. I found that when in 2x9 mode I rarely ever used the granny gear; anything that felt steep enough to require it usually meant I was going too slowly to keep my balance over rocks and roots. I'm currently on 32x11-42 and feel that it could use a wee bit extra grunt for the uphills, otherwise I greatly appreciate the range it offers.
     
    #6 -   Feb 2, 2017
  7. johnbryanpeters

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    I went from 3 x 9 to 1 x 11, losing gearing on both ends.

    Riding it for two years taught me a bunch about climbing technique, but I still want the extended range on both ends.
     
    #7 -   Feb 2, 2017
  8. Nick

    Nick My name is Nick

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    Jbp ... try a 10-46 cassette ?
     
    #8 -   Feb 2, 2017
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  9. Adventurous

    Adventurous Turbo Monkey

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    Fair enough. To be honest I never had many problems with dropped chains running a front derailleur. To each their own, good luck with the transition!
     
    #9 -   Feb 2, 2017
  10. 6thElement

    6thElement Turbo Monkey

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    Will your frame take one of the new Shimano side-swing front derailleurs?

    My 29er HT is currently rigid running 3x9, I keep pondering a change to 2x11 with 36/26 cranks and 11-40T cassette. I'd lose just over a gear at the top end, but keep the same low end. I use the bike for bike packing and a lot of road/gravel miles so I want to keep a decent range.

    I think I can make the side swing work, supposedly they're much better than traditional front derailleurs. I'd run it with a SRAM GX 2x11 rear as I use grip shifters.

    For you to make it work it sounds like you'd need:
    rear der
    front der
    front shifter
    spider and rings

    (FYI Jenson has 2x11 XTR cranksets for ~$200 at the moment)
     
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  11. johnbryanpeters

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    Why a rear derailleur?
     
  12. 6thElement

    6thElement Turbo Monkey

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    The SRAM 1x rear derailleurs won't work in a 2x system.

    Staying 1x might be your better option and trying an e13 9-46 cassette.

    Neither option is cheap though.
     
  13. rideit

    rideit Bob the Builder

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    At the risk of being lambasted, why not Eagle?
    Cassette cost?
     
  14. johnbryanpeters

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    The whole drive train I'm running on right now is absurdly expensive. SRAM in general is absurdly expensive. I put enough miles on to make this clearly evident. The Eagle would just be wading deeper into the swamp.

    Similarly, I don't want to run XTR anything.

    I think my XD rear hub pretty much compels me to stay with SRAM clusters, but if I could replace everything else with an XT 2 x setup, I would consider it seriously.
     
  15. Toshi

    Toshi Harbinger of Doom

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    I quite like my 28 x 10-42 setup.
     
  16. 6thElement

    6thElement Turbo Monkey

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    No reason you can't stick with a SRAM cassette at all.
    Get the XT FD, RD and shifters, then decide if you want to get XT cranks and BB or add a spider and rings to your existing crankset.
     
  17. Nick

    Nick My name is Nick

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    I'm on 32 - 11/45 ... If that doesn't do it I'm walking.
     
  18. OGRipper

    OGRipper Turbo Monkey

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    Aside from the range of your current setup, do you appreciate the benefits of a 1X rig? If so, consider the e.13 9-46 cassette. That should solve your concerns about range at both ends of the spectrum, and retain the benefits of 1X. Not cheap but you're looking at a bunch of dough to convert to 2X anyway.
     
  19. Serial Midget

    Serial Midget Al Bundy

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    I'm a hack so my answer is to ditch the Sram kit and find a take off XT kit cheap on teh webs. XT has been the best bang for my buck since the mid 90s.

    My bargain SB6 has a GX 2X which I find clunky and slow, the GT has XTR and the Giant has XT, I cant tell any difference but both perform flawlessly for me, replacement bits are cheap and easy to find.
     
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  20. Westy

    Westy the teste

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    SRAM Eagle. Once you've had a big black cog in your rear, you'll never go back.

     
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  21. StiHacka

    StiHacka Compensating for something

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  22. ALEXIS_DH

    ALEXIS_DH Tirelessly Awesome

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    i really regret not buying a 2x setup for my ibis.
    i can spin out when pedalling in flat terrain! (32t on 11-42t). and the jump in the 4 largest cogs are huge. hard to keep a cadence on longi-sh (1000ft+ vertical) ascents
     
  23. jstuhlman

    jstuhlman We noticed.

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  24. Jm_

    Jm_ Turbo Monkey

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    Try it now.
     
  25. johnbryanpeters

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    I have a front derailleur in hand and shifter is in transit. I'm hoping that @StiHacka has sent me a spider.
     
  26. StiHacka

    StiHacka Compensating for something

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    Apologies John, bad weather and crazy work == delays. I'll send it ASAP, tomorrow or on Saturday.
     
  27. johnbryanpeters

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    You are a gentleman and a scholar and there are very few of us left. :busted:
     
  28. johnbryanpeters

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    @StiHacka, spider and rings arrived today, TYVM!
     
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  29. Full Trucker

    Full Trucker Frikkin newb!!!

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    Well???!!?
     
  30. johnbryanpeters

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    I do things slowly. In this case, although I'm all kitted up, I'm waiting for weather warm enough to work since I lack heated shop space.
     
  31. Serial Midget

    Serial Midget Al Bundy

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    Kitchen table?