Results 1 to 6 of 6
  1. #1
    mtbr member
    Reputation: jclyle's Avatar
    Join Date
    Jun 2012
    Posts
    152

    Tool to tighten s1250 crankset?

    My cranks on 13 FSR Comp 20 are the SRAM 1250 and have come a little loose. What tool is needed to tighten them? Looks like a 10mm hex wrench.

    Anything else needed?
    2015 Giant Anthem 29er
    2012 Trek Superfly Carbon HT

  2. #2
    mtbr member
    Reputation: jclyle's Avatar
    Join Date
    Jun 2012
    Posts
    152
    Let me clarify this. The crank arms are nice and firm. The crankset as a whole has some left to right play that is just barely 1/8" in movement.
    2015 Giant Anthem 29er
    2012 Trek Superfly Carbon HT

  3. #3
    mtbr member
    Reputation:
    Join Date
    Aug 2011
    Posts
    499
    On the other side there is a pre-load. It requires a really small 2 hex. You can loosen it up and/or snug it down. It isn't how you keep it from wobbling. But other than a 2 hex and a 10 hex you shouldn't need any tools. I'm assuming they are PF30?

    Maybe a rubber mallet as well. The diagram is pretty informative. It is for XX1, but it's the same practice for XX1 or the 1250.

    http://cdn.sram.com/cdn/farfuture/Ab..._cranksets.pdf

  4. #4
    mtbr member
    Reputation: jclyle's Avatar
    Join Date
    Jun 2012
    Posts
    152
    Is the plastic cap that has the tightening instructions supposed to come off? I cant get things to budge either way using the 10mm.
    2015 Giant Anthem 29er
    2012 Trek Superfly Carbon HT

  5. #5
    mtbr member
    Reputation:
    Join Date
    Aug 2011
    Posts
    499
    I don't know what plastic cap you are talking about. I needed a breaker bar to get mine to give way. It was on purdy tight. I think they put them on super tight at the factory. It wasn't the easiest thing to do by myself either. I would suggest a helper to hold the bike and crank stable. You have to hold the bike and crank arm stable while torquing on it.

    The torque listed for tightening is more or less irrelevant. It's "really damn tight" or "really really damn tight" (425 to 475 in/lb).

  6. #6
    mtbr member
    Reputation: TiGeo's Avatar
    Join Date
    Jul 2008
    Posts
    3,933
    You just back off the 10mm..it's self extracting. This will take off the drive side arm and allow you to tighten the preload adjustment ring to get rid of the play. I have had mine apart several times for the same reason. You will need some extra leverage to get it broke loose.
    Geologist by trade...bicycle mechanic (former) by the grace of God!

    2012 Specialized Stumpy EVO 29 HT

Similar Threads

  1. Another way to tighten the chain
    By esku in forum Singlespeed
    Replies: 8
    Last Post: 12-27-2012, 01:51 PM
  2. Replies: 4
    Last Post: 12-29-2011, 09:05 AM
  3. Can we tighten up the judging?
    By SentralSteve in forum Downhill - Freeride
    Replies: 3
    Last Post: 09-11-2011, 10:59 AM
  4. Giant Tool Shed Multi-Tool - Ten Bucks - incl. chain tool
    By aa240sx in forum Where are the Best Deals?
    Replies: 0
    Last Post: 06-23-2011, 12:17 PM
  5. Tool to tighten derailler hanger bolt
    By Mtn-Rider in forum Tooltime
    Replies: 9
    Last Post: 01-19-2011, 11:20 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
  •