Bearings headset. Degrees or inner diameter?
05-19-22, 07:46 AM
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Bearings headset. Degrees or inner diameter?
Hi.
I have a trifox bike and I need new bearings because they roasted away after only a few months...
It says this on the actual bearing: P16(⌀52x7x45°). P16 is double sealed. 52 is outer diameter 7 is the width and 45 is the degrees right.
NOW what is the inner diameter then?
Aren't you supposed to have the inner diameter as the third measure? I am very confused about the degrees and the inner diameter. If you have 45 degrees you can have both 45/45 and 45/36? And But I also found this so maybe you can tell what I actually need:
"Size：1-1/8,1-1/2 integrated headset
Crown：7075/T6 CNC (OD ø33X45)
Cartridge Ball Bearing：CBB-418
OD ø41.8X45X45
OD ø52x45x45
Top cover：6061/T CNC with rubber O ring
Material：6061/T6 CNC machined top cover
Steel crown Race
Type：For Carbon Fork"
Trifox have posted it themselves on this very site but it says I can't link to external sites when having under 10 posts... I have also contacted them but they are not answering.
I have a trifox bike and I need new bearings because they roasted away after only a few months...
It says this on the actual bearing: P16(⌀52x7x45°). P16 is double sealed. 52 is outer diameter 7 is the width and 45 is the degrees right.
NOW what is the inner diameter then?
Aren't you supposed to have the inner diameter as the third measure? I am very confused about the degrees and the inner diameter. If you have 45 degrees you can have both 45/45 and 45/36? And But I also found this so maybe you can tell what I actually need:
"Size：1-1/8,1-1/2 integrated headset
Crown：7075/T6 CNC (OD ø33X45)
Cartridge Ball Bearing：CBB-418
OD ø41.8X45X45
OD ø52x45x45
Top cover：6061/T CNC with rubber O ring
Material：6061/T6 CNC machined top cover
Steel crown Race
Type：For Carbon Fork"
Trifox have posted it themselves on this very site but it says I can't link to external sites when having under 10 posts... I have also contacted them but they are not answering.
Last edited by CyclingStone; 05-19-22 at 07:51 AM.
05-19-22, 09:18 AM
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Have you measured the fork ?
Barry
Barry
05-19-22, 09:35 AM
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There are two different-sized bearings, one for the 1 1/8" steering tube at the top, one of the 1 1/2" crown at the bottom. The inner surfaces of the bearings have to mate with the crown race at the bottom and the compression ring at the top. Both of them are probably filleted at 45 degrees. The ID only has to clear the crown race and steering tube so the exact machine spec really doesn't matter.
You'll need to get the exact replacement bearings. In addition to CBB-418, you'll need another, probably CBB-52 if what I see on Google is correct.
You'll need to get the exact replacement bearings. In addition to CBB-418, you'll need another, probably CBB-52 if what I see on Google is correct.
05-19-22, 10:29 AM
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There are two different-sized bearings, one for the 1 1/8" steering tube at the top, one of the 1 1/2" crown at the bottom. The inner surfaces of the bearings have to mate with the crown race at the bottom and the compression ring at the top. Both of them are probably filleted at 45 degrees. The ID only has to clear the crown race and steering tube so the exact machine spec really doesn't matter.
You'll need to get the exact replacement bearings. In addition to CBB-418, you'll need another, probably CBB-52 if what I see on Google is correct.
You'll need to get the exact replacement bearings. In addition to CBB-418, you'll need another, probably CBB-52 if what I see on Google is correct.
I do understand there are two bearings, one upper and one lower, I will probably have to take out both. This measure is from the upper. I however thought that the best way was to have the specifications but clearly it isn't. Very murk.
Nope
Last edited by CyclingStone; 05-19-22 at 10:33 AM.
05-19-22, 10:41 AM
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"Crown: 7075/T6 CNC (OD ø33X45)
Cartridge Ball Bearing: CBB-418, OD ø41.8X45X45, OD ø52x45x45
Top cover: 6061/T CNC with rubber O ring
Material: 6061/T6 CNC machined top cover, Steel crown Race"
Cartridge Ball Bearing: CBB-418, OD ø41.8X45X45, OD ø52x45x45
Top cover: 6061/T CNC with rubber O ring
Material: 6061/T6 CNC machined top cover, Steel crown Race"
05-19-22, 10:54 AM
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If you want a better headset, that tapered configuration is fairly common. You'll need some tools and experience to replace the crown race with the new one that comes with the new headset.
05-19-22, 01:52 PM
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Ok thanks for the answers I guess. As usual do I feel as clueless as before. I guess I need to learn everything there is to learn before I buy new ones because people seem to be uncertain.I know the things you are talking about, I want the right size for the replacements.
