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  1. #1
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    Bearing ?? 45-degree and 36-degree contact

    For a 36x45 bearing Which is the angle of the internal shoulder "cup" for cartridge bearing and which is for the crown race. My Look fork spec is 45-degree for the built in crown. Do I really need a 45x45; or will the stock 36x45 work?

  2. #2
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    You have a very high end fork, would use the manufactures spec parts for it.

  3. #3
    bike whisperer Kimmo's Avatar
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    copy/paste links: http://velospace.org/node/36949 http://velospace.org/node/47746 http://velospace.org/node/47747
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    ^ What he said

  4. #4
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    The first number (36) refers to the bearing to fork/centering ring interface. The second number (45) refers to the bearing to frame, or headset cup interface. If the fork specifies a 45 degree inside angle on the bearing, get one. Attempting to use the 36 degree bearing will ruin the fork. Don't attempt to change the top bearing to 45/45 and keep the original (36) centering ring. You could buy a complete headset, or just the bottom bearing, and keep the top as is.

  5. #5
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    Thanks, I will just buy a bottom 45x45 bearing (that is Campy standard I think). FSA makes an "Orbit" 45x45 bearing; that should fit.
    http://www.bikepartsexpress.com/mm5/...FQgw4AodTlMAhQ

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    Quote Originally Posted by Erik_A View Post
    that should fit.
    That isn't good enough on high end parts, it either does or doesn't. You will have dropped a lot of money on a very high end fork, would be going to your local Look dealer, and getting the OEM Look part for this.

  7. #7
    bike whisperer Kimmo's Avatar
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    copy/paste links: http://velospace.org/node/36949 http://velospace.org/node/47746 http://velospace.org/node/47747
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    Again, +1 Jim

  8. #8
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    The problem that I have found is that all 45x45 bearings are 41.8 outside dia. and my Cane Creek S-8 is 41.0 OD. I don't think that any 45x45 bearings will fit. I wish I couls buy a 41.8 45x45 cup headset like the S-8 (even just the bottom) but they are all for integrated headsets. Any advice?

  9. #9
    Senior Member IthaDan's Avatar
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    Not enough information.

    What's the frame? what's the headset? What's the fork? Is the fork tapered? What's wrong with the headset you have on there? Is the fork a replacement?

    Shimano : Click :: Campy :: Snap :: SRAM : Bang

  10. #10
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    Frame: Fuji Newest with not-integrated headtube
    Headset: Cane Creek S-8 with 36/45 bottom Bearing 41.0 outside dia.
    New replacement Fork: Look 566 with built-in crown race at 45 degrees (not 36 degrees like old fork)

    Quote Originally Posted by IthaDan View Post
    Not enough information.

    What's the frame? what's the headset? What's the fork? Is the fork tapered? What's wrong with the headset you have on there? Is the fork a replacement?

  11. #11
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    You're most like going to have buy/install a complete headset. There are some available with 45/45 bottom bearings. Woodman has an economical (they're good- I have several in use) headset with a 45/45 bearing. Hopefully the cup od (34) matches your frame.

  12. #12
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    Are you sure that the crown race has a 45 degree angle? The 585 models had the built-in crown race, but it was 36 degrees. Here's some info on a 566. The headset appears to be an IS standard model, just like the 585 uses. I can't imagine that LOOK would change the lower seat angle after many years of using 36 degrees.

    http://www.bikesportmichigan.com/rev...566-2009.shtml

    Frames with the headfit system use a 45 degree seat, but the lower portion of the fork is also 1-1/4" in diameter.
    Last edited by DaveSSS; 04-12-13 at 08:52 AM.

  13. #13
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    I am going from Look's website; but I can't tell by looking at the actual Fork: http://www.lookcycle.com/en/us/route...egra-bike.html
    " The fork also utilizes the Look patented integrated conical carbon crown (45 bearing angle)."


    Quote Originally Posted by DaveSSS View Post
    Are you sure that the crown race has a 45 degree angle? The 585 models had the built-in crown race, but it was 36 degrees. Here's some info on a 566. The headset appears to be an IS standard model, just like the 585 uses. I can't imagine that LOOK would change the lower seat angle after many years of using 36 degrees.

    http://www.bikesportmichigan.com/rev...566-2009.shtml

    Frames with the headfit system use a 45 degree seat, but the lower portion of the fork is also 1-1/4" in diameter.

  14. #14
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    This may work if the thickness protrudes below the bottom headset cup:
    Headset Angular Contact Bearing 41x30 2x6 5 45X45 | eBay

  15. #15
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    Dave-

    You may be right, the more I research - the more conflicting info I find:
    This PDF shows 36 degrees:
    http://www.lookcycle.com/media/catal...i/file_2_3.pdf

    Quote Originally Posted by DaveSSS View Post
    Are you sure that the crown race has a 45 degree angle? The 585 models had the built-in crown race, but it was 36 degrees. Here's some info on a 566. The headset appears to be an IS standard model, just like the 585 uses. I can't imagine that LOOK would change the lower seat angle after many years of using 36 degrees.

    http://www.bikesportmichigan.com/rev...566-2009.shtml

    Frames with the headfit system use a 45 degree seat, but the lower portion of the fork is also 1-1/4" in diameter.

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