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Old 04-07-13, 10:18 PM   #1
Erik_A
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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?
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Old 04-08-13, 12:43 AM   #2
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You have a very high end fork, would use the manufactures spec parts for it.
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Old 04-08-13, 02:02 AM   #3
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^ What he said
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Old 04-08-13, 09:24 AM   #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.
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Old 04-08-13, 11:40 AM   #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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Old 04-08-13, 12:23 PM   #6
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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.
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Old 04-09-13, 12:33 PM   #7
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Again, +1 Jim
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Old 04-11-13, 09:45 PM   #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?
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Old 04-11-13, 09:59 PM   #9
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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?
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Old 04-11-13, 10:04 PM   #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)

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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?
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Old 04-12-13, 12:19 AM   #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.
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Old 04-12-13, 07:48 AM   #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 07:52 AM.
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Old 04-12-13, 08:12 AM   #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)."


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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.
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Old 04-12-13, 08:21 AM   #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
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Old 04-12-13, 05:53 PM   #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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