Results 1 to 7 of 7
  1. #1
    mtbr member
    Reputation:
    Join Date
    Apr 2010
    Posts
    69

    Would anone know the BCD of Stumpjumper Sram Crankset?

    Thinking of going 1x10

    Below are my crankset specs

    CRANKSET
    Custom SRAM S-1250, 7050 alloy arms, 10-speed XC double, PF30 spindle, 15.5": 170mm, Others: 175mm
    CHAINRINGS
    38/24

    Would the e13s single speed chainring fit?

  2. #2
    There's always next year.
    Reputation: padrefan1982's Avatar
    Join Date
    Mar 2005
    Posts
    542
    They should be 120 / 80, but unless you go to a smaller company, almost all of those rings will be ramped for shifting, I believe... Better option might be something like MRP's Bling Ring, which replaces the crank's spider (what the rings attach too) and replaces it with a single ring.

  3. #3
    mtbr member
    Reputation:
    Join Date
    Apr 2010
    Posts
    69
    Measured it.. its actually 104.. Thanks!!!

  4. #4
    There's always next year.
    Reputation: padrefan1982's Avatar
    Join Date
    Mar 2005
    Posts
    542
    Quote Originally Posted by littlepitboy View Post
    Measured it.. its actually 104.. Thanks!!!
    Yup-- you are right... I was misinformed, and never took the time to double check the information myself. Lesson learned!

  5. #5
    mtbr member
    Reputation: Mr. Lynch's Avatar
    Join Date
    Jun 2010
    Posts
    2,334
    I recently helped a buddy switch to 1x10 on his s1250 crankset. He went with the wolftooth 30t ring. It is similar to the XX1 ring and it holds the chain REALLY well.

    104 BCD Chainrings | wolftoothcycling.com
    2013 Stumpy Evo
    2014 Fatboy

  6. #6
    mtbr member
    Reputation:
    Join Date
    Apr 2010
    Posts
    69
    @ Mr. Lynch - does this mean no need for a chain guide? would be cool!!!
    im using e-13 xcx seattube mount

    @padrefan1982 - no worries. Im stubborn myself and wanted to make sure

  7. #7
    mtbr member
    Reputation:
    Join Date
    Oct 2009
    Posts
    813
    I just swapped out my S-1250 for the XX1 (32T/156 Q factor) crankset and there was no need for a chain guide, not only that it reduced the overall weight of my bike by 1 lb. 3 ounces...
    If you can swing a few $$$, definitely worth it IMO...
    2013 C-Dale Scalpel
    2013 Scott Genius 930

Similar Threads

  1. Replies: 122
    Last Post: 04-16-2014, 05:02 PM
  2. Stumpjumper FSR Crankset Removal
    By Loll in forum Specialized
    Replies: 2
    Last Post: 07-18-2012, 09:04 AM
  3. Stumpjumper 29 Comp - bb & crankset ???
    By Love2bike1234 in forum Specialized
    Replies: 4
    Last Post: 07-13-2012, 06:52 PM
  4. Stumpjumper 29 Comp - bb & crankset ???
    By Love2bike1234 in forum 29er Bikes
    Replies: 0
    Last Post: 07-13-2012, 06:04 AM
  5. Anone have pic of a M9 with stripped decals/graphics?
    By alldownhillfromhere in forum Downhill - Freeride
    Replies: 2
    Last Post: 05-20-2011, 06:46 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
  •