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  1. #1
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    Square, ISIS, or Octolink?

    I'm about to replace my crank/bb on an older bike. I'm seeing some sweet deals on octolink cranks and bb but my lbs guy said he hated octolink, he didn't state why though. Whats the benefits/disadvantages of each and what do you guys recommend

    Currently all I have ever ridden on is Square Spindle. I'm looking at a Shimano LX M580. I don't wanna spend a whole lot cause this won't be my main bike for very long as i'm purchasing a new one in a few weeks.

    Thanks!

  2. #2
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    Octalink

    Quote Originally Posted by drpcken
    I'm about to replace my crank/bb on an older bike. I'm seeing some sweet deals on octolink cranks and bb but my lbs guy said he hated octolink, he didn't state why though. Whats the benefits/disadvantages of each and what do you guys recommend.
    I've used both Octalink and ISIS. (Square taper too on my really old road bike...)

    If it's a choice between Octalink and ISIS, I'd choose Octalink because the bearings tend to last longer. That said, if your square taper is still working, why replace it?

  3. #3
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    well i'm replacing the whole BB and Crankset, and the crankset taper is worn too.

    So if you had to suggest between OctaLink and Square spindle, which would you choose? Is the OctaLink stiffer compared to Square?

    Thanks for the reply!

  4. #4
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    btw this is what i'm looking at getting

    http://www.pricepoint.com/detail/137...c=2&zmap=13708

  5. #5
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    None of the above...

    Quote Originally Posted by drpcken
    btw this is what i'm looking at getting

    http://www.pricepoint.com/detail/137...c=2&zmap=13708
    Yeah that looks nice.

    FYI, that crankset is neither ISIS, Octalink, nor square taper. It's one of the newer outboard bearing cranksets. I'm running the XT version on my bike and I really like it.

    The one drawback to this crankset is that it will likely move your chainline out a bit. You should look your bike over and decide whether or not that's okay. If the chainline issue is okay, I'd choose this over the other options you mentioned earlier: square taper, ISIS, and Octalink.
    Last edited by KevinB; 07-26-2006 at 10:26 AM.

  6. #6
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    i was gonna pick it up new on ebay... here's what i'm looking at:
    it says octalink though... I'm confused

    http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA%3AIT&rd=1

  7. #7
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    Quote Originally Posted by drpcken
    i was gonna pick it up new on ebay... here's what i'm looking at:
    it says octalink though... I'm confused

    http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA%3AIT&rd=1
    That looks okay too.

    In spite of what the ad says, I don't believe it's Octalink. (See http://www.sheldonbrown.com/gloss_n-o.html#octalink to see what Octalink looks like.) From the picture in the ebay link, it does appear to be a Hollowtech 2 crankset. (Which is good.)
    Last edited by KevinB; 07-26-2006 at 10:45 AM.

  8. #8
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    yea i noticed it didn't look quite like octalink.

    man thats great! all my questions are answered!

    just one more I've been riding on 170mm arms, these are 175mm. will that be a prob? or will i noticed a difference?

    thanks again KevinB

  9. #9
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    Quote Originally Posted by drpcken
    I've been riding on 170mm arms, these are 175mm. will that be a prob? or will i noticed a difference?
    5mm isn't much of a change. Will you notice a difference? I really don't know. Maybe borrow a bike with 175mm cranks to see?

  10. #10
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    Mine is 175mm dude. I don't think it will be an issue.

  11. #11
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    Quote Originally Posted by KevinB
    5mm isn't much of a change. Will you notice a difference? I really don't know. Maybe borrow a bike with 175mm cranks to see?

    Sweeet, this is the crank i'm going with

    THanks agian KevinB!

  12. #12
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    Quote Originally Posted by drpcken
    Sweeet, this is the crank i'm going with

    THanks agian KevinB!
    it may take a few weeks to get used to a longer crank (or you may not notice anything)... also you may end up changing the height & position of the saddle, I think you'll want to lower the seat a bit to compensate for longer cranks.
    [SIZE=1][/SIZE]

  13. #13
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    thanks for the input! I can't wiat to get my new equip

  14. #14
    "El Whatever"
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    Quote Originally Posted by drpcken
    yea i noticed it didn't look quite like octalink.

    man thats great! all my questions are answered!

    just one more I've been riding on 170mm arms, these are 175mm. will that be a prob? or will i noticed a difference?

    thanks again KevinB
    How tall are you??
    What's your inseam?

    Crank lenght depends on your leg lenght. In size "S" bikes, the cranks are a bit shorter to acommodate shorter riders.

    I went from 175 and 170, being 5'9" and like 32" inseam and I haven't get used to the shorter cranks. Not something bad really, but noticeable. It does not go well with my rather low spin and low torque.
    Check my Site

  15. #15
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    haha i'm a whopping 5'2"

    not exactly sure on the inseam, the woman said she's too "busy" to measure it right now

  16. #16
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    Quote Originally Posted by drpcken
    haha i'm a whopping 5'2"

    not exactly sure on the inseam, the woman said she's too "busy" to measure it right now
    Look at your Levi's or Wrangler jeans size... the second number is the inseam. If you're at 30, maybe you should stick to 170mm.

    Good luck with whatever you decide.
    Check my Site

  17. #17
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    drat, i've already ordered the crankset...
    my buddy has a gary fisher with 175mm, i rode it (without even adjusting the seat) and it wasn't too bad.

  18. #18
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    i just got to looking at how big 5mm is, its literally like this much |----|
    i don't think it'll be a problem, i'll just adjust my seat


  19. #19
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    [----] is a world of difference in XC racing.

    you will be just fine. Nothing more exciting than getting new parts and seeing that nice little box on your front porch. enjoy.

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