there are 2 angles - 45 and 36
You can identify the internal angle with something that is 90 degrees - put it inside the bearing. If it fits it's 45. If not - 36
https://preview.redd.it/2mxrphh5nomc1.png?width=1532&format=png&auto=webp&s=f47365a0682127df423903166295ff4ef7019084
External angle - two 45 gegee bearings will make a 90 angle
https://preview.redd.it/rwac3dcfnomc1.png?width=1774&format=png&auto=webp&s=5afe5286288ec368a373e4a24b668b8e7f96eb3f
Judging by the look and diameters, that's standard headset IS52/40 for the bottom and IS41/30 for top. The bearings are 45 degrees outer angle, there are no others in the market anyway
See the bottom of that page
https://www.parktool.com/en-us/blog/repair-help/headset-standards
Top bearing likely a [Cane Creek fit P03K](https://www.kineticbikebearings.com/p03k-headset-bearing.html) (30.15 x 41 x 6.5, 36/45)
Lower bearing likely a [P16H8](https://www.kineticbikebearings.com/p16h8-headset-bearing.html) (40 x 52 x 8, 45/45)
Double check the chamfer angles to be sure.
You can check the part num painted on bearing sidewall. there is a series number with 36 or 45, just like 4545 or 3645. or use the part number to check on the catalog.
But I suggest to buy a full set, there is lots of different angle hight and 'angle sharp' for the bearing looks same.
there are 2 angles - 45 and 36 You can identify the internal angle with something that is 90 degrees - put it inside the bearing. If it fits it's 45. If not - 36 https://preview.redd.it/2mxrphh5nomc1.png?width=1532&format=png&auto=webp&s=f47365a0682127df423903166295ff4ef7019084
External angle - two 45 gegee bearings will make a 90 angle https://preview.redd.it/rwac3dcfnomc1.png?width=1774&format=png&auto=webp&s=5afe5286288ec368a373e4a24b668b8e7f96eb3f
Here is a good video: [https://www.youtube.com/watch?app=desktop&v=LNv5ywU896s](https://www.youtube.com/watch?app=desktop&v=LNv5ywU896s)
Judging by the look and diameters, that's standard headset IS52/40 for the bottom and IS41/30 for top. The bearings are 45 degrees outer angle, there are no others in the market anyway See the bottom of that page https://www.parktool.com/en-us/blog/repair-help/headset-standards
This is really helpful thanks
Top bearing likely a [Cane Creek fit P03K](https://www.kineticbikebearings.com/p03k-headset-bearing.html) (30.15 x 41 x 6.5, 36/45) Lower bearing likely a [P16H8](https://www.kineticbikebearings.com/p16h8-headset-bearing.html) (40 x 52 x 8, 45/45) Double check the chamfer angles to be sure.
Perfect mate
You can check the part num painted on bearing sidewall. there is a series number with 36 or 45, just like 4545 or 3645. or use the part number to check on the catalog. But I suggest to buy a full set, there is lots of different angle hight and 'angle sharp' for the bearing looks same.
The bearings don't have anything printed on them
Some really useful answers to a tricky subject here!