Results 1 to 14 of 14
  1. #1
    mtbr member
    Reputation:
    Join Date
    Jul 2011
    Posts
    58

    Upgrading to SRAM X.9. Rear Derailleur Length?

    I'm about to go ahead and upgrade my x5 shifters / x7 rear d. with all x9 components. (Mod addict dont ask) I tried following the guide in the drivetrain forum but my head almost exploded.

    I'm just wondering if I need a long/med/short cage rear derailleur? I'm assuming what I have on there now is long.

    This is a 2011 Mission 1 BTW. Any input would be greatly appreciated.

  2. #2
    mtbr member
    Reputation:
    Join Date
    Feb 2008
    Posts
    417
    in general: short cage for 1 front chain ring. Mid cage for 2 front chain rings. Long cage for 3 front chain rings.

  3. #3
    mtbr member
    Reputation:
    Join Date
    Jul 2011
    Posts
    58
    Thats good to know, considering im running a 2x9 setup right now. I feel like the x7 thats on there is long cage.

  4. #4
    mtbr member
    Reputation:
    Join Date
    Oct 2006
    Posts
    484
    Mid is the 'safest' bet for AM riding.

  5. #5
    mtbr member
    Reputation:
    Join Date
    Jul 2011
    Posts
    58
    On second thought, I might just go with the x.9 shifters. They would be a big upgrade from the x.5, with that zero loss technology.

    From what I see the only upgrade from the x7 to x9 rear D. is some weight savings.

  6. #6
    Let the good times roll.
    Reputation: miniwisejosh's Avatar
    Join Date
    Sep 2007
    Posts
    1,158
    In 2010, I called SRAM to ask about differences between the X7 and X9 derailleurs that year. The tech I spoke with said they are identical except for a few extra lightweight Al parts on the X9. I've been using x7s ever since then. Only reason to go x9 IMO is to get a short cage which can be hard to find in x7s

    Do get x9 shifters. They are a noticeable improvement over x5s and x7s.

  7. #7
    mtbr member
    Reputation:
    Join Date
    Jul 2011
    Posts
    58
    Thanks miniwise, thats some good bit of information.

    Any difference between the 2010 and 2011 x9 triggers? I can get the 2011 for $99 and the 2010 for $81

  8. #8
    Let the good times roll.
    Reputation: miniwisejosh's Avatar
    Join Date
    Sep 2007
    Posts
    1,158
    I think SRAM's 9 speed parts stayed mostly the same from 2010 to 2011.

    Have you considered switching to 10 speed? SRAM and Shimano seem to be moving away from 9 speed, so finding replacement parts may become harder in the future. Might as well upgrade now since you're already buying most of the parts you'll need. All that's left is a new cassette. Depending on your local terrain and fitness level, you may even be able to get away with 1x10 which means a simpler setup and less weight.

    http://www.universalcycles.com/shopping/product_details.php?id=37244&category=692

    http://www.universalcycles.com/shopping/product_details.php?id=37237&category=773

    http://www.universalcycles.com/shopping/product_details.php?id=36711&category=534

    Discount code VIP10 gives 10% off orders over $100
    code VIP15 gives 15% off orders over $300


    Shoot me a PM if you really want to stay with 9 speed and are interested in used parts. I'm planning to upgrade my 2x9 drivetrain to 1x10 soon, and I'll be selling the removed parts for cheap.

  9. #9
    mtbr member
    Reputation:
    Join Date
    Jul 2011
    Posts
    58
    I've definately being looking at a 10 speed rear. Im assuming I would need to upgrade to a crank
    that's spaced for a 10 speed rear?

    The only thing shying me away from going 1x10 as apposed a 2x10 is where I ride theres just as much climbing if not more then downhill. Not sure if I would have enough range. I have been debating it though.

  10. #10
    Butts Up Fast!
    Reputation: Stonebreaker's Avatar
    Join Date
    Oct 2009
    Posts
    398
    I went 1x9 a year ago on my mission and went with a short cage X9 derailleur and shifter. It's made me a lot faster and smoother rider out of necessity to adapt to the simpler setup. Needing to carry more momentum for hills has made my rides so much funner.

  11. #11
    Singletrack Slayer
    Reputation: DavidNeiles's Avatar
    Join Date
    May 2008
    Posts
    1,927
    Quote Originally Posted by iRace559 View Post
    I've definately being looking at a 10 speed rear. Im assuming I would need to upgrade to a crank
    that's spaced for a 10 speed rear?

    The only thing shying me away from going 1x10 as apposed a 2x10 is where I ride theres just as much climbing if not more then downhill. Not sure if I would have enough range. I have been debating it though.
    No, you would need 10spd chain rings.. for 3x10 or 2x10 w bash or 1x 10 if you want the double 2x10 setup then yes a new crankset would be worth it...
    ~~~~~~Singletrack Slayer~~~~~~~

  12. #12
    mtbr member
    Reputation:
    Join Date
    Jul 2011
    Posts
    58
    I would most likely stick to a 2x10 with bash setup.

    I dont get what the difference is though from a 10 speed crankset (chainrings) and a 9 speed.

    Is the spacing different or something allowing the chain to hit all 10 in the rear?

  13. #13
    Singletrack Slayer
    Reputation: DavidNeiles's Avatar
    Join Date
    May 2008
    Posts
    1,927
    Quote Originally Posted by iRace559 View Post
    I would most likely stick to a 2x10 with bash setup.

    I dont get what the difference is though from a 10 speed crankset (chainrings) and a 9 speed.

    Is the spacing different or something allowing the chain to hit all 10 in the rear?
    You would just need 10 speed chainrings up front because 10spd chain is narrower...
    ~~~~~~Singletrack Slayer~~~~~~~

  14. #14
    Let the good times roll.
    Reputation: miniwisejosh's Avatar
    Join Date
    Sep 2007
    Posts
    1,158
    Quote Originally Posted by iRace559 View Post
    I've definately being looking at a 10 speed rear. Im assuming I would need to upgrade to a crank
    that's spaced for a 10 speed rear?

    The only thing shying me away from going 1x10 as apposed a 2x10 is where I ride theres just as much climbing if not more then downhill. Not sure if I would have enough range. I have been debating it though.

    Have you found this link yet? Sheldon Brown's Bicycle Gear Calculator

    When I entered the specs for my current 2x9 setup and my planned future 1x10 setup, I found that I'll only be losing 2 climbing ratios and one high speed gear.

Similar Threads

  1. SRAM MRX Comp shifter 2.1 compatible with which SRAM rear derailleur?
    By djork in forum Drivetrain - shifters, derailleurs, cranks
    Replies: 3
    Last Post: 09-04-2008, 10:52 AM
  2. Replies: 10
    Last Post: 03-17-2007, 02:19 PM
  3. SRAM rear derailleur length
    By drnich in forum SRAM
    Replies: 2
    Last Post: 01-27-2007, 04:38 PM
  4. upgrading rear derailleur
    By liquidgas in forum Drivetrain - shifters, derailleurs, cranks
    Replies: 5
    Last Post: 10-15-2006, 05:37 PM
  5. Sram x9 rear derailleur + Sram x7 shifters + shimano cassette (Shifting all messed?!?
    By Angus_fairgrieve in forum Drivetrain - shifters, derailleurs, cranks
    Replies: 5
    Last Post: 08-17-2006, 08:36 AM

Posting Permissions

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