XX1 cranks on Sir9- Mtbr.com
Results 1 to 7 of 7
  1. #1
    mtbr member
    Reputation:
    Join Date
    May 2010
    Posts
    582

    XX1 cranks on Sir9

    Installing XX1 cranks on my 2nd gen Sir9. BB spacer situation is bit confusing. Instructions say no spacers for 73mm BB and 2 spacers for road 68. If I put both on, which is what I thought I needed to do, crank binds and doesnít spin. I tried one on each side and two on one side. No go.

    No spacers have too much play.

    I ended up with one spacer. Seems ok but Iíve got a weird squeak halfway through the pedal stroke.

    Any advice here?

  2. #2
    mtbr member
    Reputation:
    Join Date
    Dec 2017
    Posts
    15
    Did you make sure you set your preload adjuster correctly?


    Sent from my iPhone using Tapatalk

  3. #3
    mtbr member
    Reputation:
    Join Date
    May 2010
    Posts
    582
    You mean the bolt on the NDS arm? I just cranked it tight. Spins fine. Just found it odd I only needed one spacer.

  4. #4
    mtbr member
    Reputation:
    Join Date
    Dec 2017
    Posts
    15
    Should be a grey threaded pre load adjuster on the NDS, itís just plastic but you should make sure itís backed off all the way before torquing the drive side crank arm. Not sure if itís the same for the xx1 crank, but I had to tap my drive side with a mallet to seat it, then torque it, then adjust the preload collar on the NDS until it stops (donít strip it). If you have the right spacers the play should be gone. If thereís still play, reset everything, make sure itís greased well, add spacers if necessary and install again. This is what worked for me on my sram Bb30 crank.


    Sent from my iPhone using Tapatalk

  5. #5
    mtbr member
    Reputation:
    Join Date
    May 2010
    Posts
    582
    I think itís different than GXP XX1 crank. I donít have a preload adjuster on mine....

  6. #6
    mtbr member
    Reputation:
    Join Date
    Dec 2017
    Posts
    15
    Gotcha, I shouldíve said mine isnít xx1 but it is a Bb30 crank. I looked up a diagram for the xx1 Bb30 crank and it showed the same adjuster. Hope I didnít cause any confusion!


    Sent from my iPhone using Tapatalk

  7. #7
    mtbr member
    Reputation:
    Join Date
    Oct 2009
    Posts
    706
    I will look when I get home. I run a GXP crank on my ROS9. Are you using the BioCentric 2?

Similar Threads

  1. Comparing stiffness of SRAM cranks - X1/X01/XX1 and Eagle X01/XX1?
    By morkys in forum Drivetrain - shifters, derailleurs, cranks
    Replies: 15
    Last Post: 07-18-2017, 05:37 PM
  2. xo1 eagle cranks stronger then xx1 eagle cranks?
    By SB Trails in forum Drivetrain - shifters, derailleurs, cranks
    Replies: 8
    Last Post: 06-30-2017, 10:07 PM
  3. Old sir9 vs new sir9 vs other?!
    By Mayor69PRS in forum 29er Bikes
    Replies: 11
    Last Post: 09-03-2012, 12:48 PM
  4. Sir9 BB Length with SS ENO Cranks? (cp'd to 29er)
    By endure26 in forum Niner Bikes
    Replies: 1
    Last Post: 12-15-2006, 02:04 PM
  5. Sir9 BB Length with SS ENO Cranks? (cp'd to Niner)
    By endure26 in forum 29er Bikes
    Replies: 2
    Last Post: 12-15-2006, 07:58 AM

Members who have read this thread: 2

Posting Permissions

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

THE SITE

ABOUT MTBR

VISIT US AT

© Copyright 2020 VerticalScope Inc. All rights reserved.