Results 1 to 10 of 10
  1. #1
    mtbr member
    Reputation:
    Join Date
    Apr 2004
    Posts
    188

    Crankset not centered?

    I put on a SRAM XX1 crankset on my 2015 epic and it looks like it's not centered on the frame.. i.e.: the left crank arm is about 3 mm from the chain stay and on the right, it's about 1.5 cm.. The washer according to the instructions goes on the drive side.. The chainline seems weird as well, as it's only straight when it's 3 cogs from the bottom.. Do I need to use different washers to center it? I used the one it came with.. Any help would really be appreciated.. On all my other bikes, the cranks seem entered on the frame, but on my epic they seem used to one side..

  2. #2
    Formerly of Kent
    Reputation: Le Duke's Avatar
    Join Date
    Mar 2009
    Posts
    8,670
    Have you considered the fact that your frame is probably not constructed in a symmetric manner?

    AKA, the chainstays have different dimensions?

    Plenty of bikes like that these days.
    Death from Below.

  3. #3
    mtbr member
    Reputation: Saul Lumikko's Avatar
    Join Date
    Oct 2012
    Posts
    1,801
    Check the distance between the seat tube and cranks. The seat tube is centered for sure.

    Sounds like you have to move a spacer from the right side to the left. I have X0 cranks with a 68 mm BB shell, and used two spacers under the left cup and one under the drive side cup.

  4. #4
    mtbr member
    Reputation: watts888's Avatar
    Join Date
    Oct 2012
    Posts
    6,212
    Sounds like you need to move some spacers from drive side to non-drive side.

    Most important, I'd move spacers to get the chainline I need. As long as the chainline is good, I don't care if the spacing between crankarms and frame isn't even, as long as I have enough clearance. the chainline has to be good though.

  5. #5
    mtbr member
    Reputation:
    Join Date
    Apr 2004
    Posts
    188
    That's the thing.. The cranks only came with one spacer and it's quite obvious it doesn't go on the non drive side. They were pretty even when I was using Shimano.. Just different with the SRAM.. Very frustrating..

  6. #6
    Formerly of Kent
    Reputation: Le Duke's Avatar
    Join Date
    Mar 2009
    Posts
    8,670
    What is the actual problem?

    Your chain line might be slightly off (easily fixed), but other than that, I'm guessing you'll never notice.
    Death from Below.

  7. #7
    mtbr member
    Reputation: watts888's Avatar
    Join Date
    Oct 2012
    Posts
    6,212
    Quote Originally Posted by mosovich View Post
    That's the thing.. The cranks only came with one spacer and it's quite obvious it doesn't go on the non drive side. They were pretty even when I was using Shimano.. Just different with the SRAM.. Very frustrating..
    Is the spacer something like 7mm? Why doesn't it go on the non-drive side? If it's just the spacers that go between the external bearings and the frame, get some new ones. If the one you have is really thick, I'd take a closer look and make sure it's not multiple ones stuck together really well.

  8. #8
    mtbr member
    Reputation: Saul Lumikko's Avatar
    Join Date
    Oct 2012
    Posts
    1,801
    Even with just one spacer, if your cranks and chainline are biased to the right, move the spacer to the left.

    Any gap between the drive side cup and crank? (There should be a small one.)

    What's your BB shell width?

  9. #9
    mtbr member
    Reputation:
    Join Date
    Apr 2004
    Posts
    188
    I'm using a Chris King BB as the Specialized one was cr#p.. The problem is my right leg feels like it's more out than the left.. So, it's not just a chainline issue.. Going to LBS tomorrow to see if they have some spacers.. Just a PIA though... I'll tinker with it tomorrow as it's supposed to rain, so I'll have some time on my hands..

  10. #10
    mtbr member
    Reputation:
    Join Date
    Apr 2004
    Posts
    188
    Put on an XTR crankset.. Problem solved.. Anyone interested in a SRAM XX1 crankset, let me know...

Similar Threads

  1. Centered Vs. Offset
    By farmerfrederico in forum Fat bikes
    Replies: 12
    Last Post: 09-28-2012, 11:39 AM
  2. Spec Out My New 9 Zero 7, 170, Centered
    By gcappy in forum Fat bikes
    Replies: 1
    Last Post: 08-27-2012, 06:33 PM
  3. wheel not centered
    By gorgice in forum Wheels and Tires
    Replies: 2
    Last Post: 07-30-2012, 10:41 AM
  4. GXP crankset not centered in BB shell--machine one side and space the other?
    By zaskaranddriver in forum Drivetrain - shifters, derailleurs, cranks
    Replies: 10
    Last Post: 05-30-2012, 05:10 PM
  5. Fork not centered?
    By mtnbiker64 in forum Beginner's Corner
    Replies: 9
    Last Post: 01-03-2011, 11:06 PM

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
  •