Mrs_oab’s lower headset bearing is toast.

2015 Liv Invite, with top spacer branded FSA.

Due to the corrosion all we can make out is ACB, 45* and 970. Not all in same run of code/information.

I’m thinking this is correct – any other knowledge before I order?

https://www.ebay.co.uk/itm/143251104618?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=h-amArnNQ9O&sssrc=2349624&ssuid=BRh_B_O1RFu&var=&widget_ver=artemis&media=COPY

Just check the measurements?
You have measured it haven’t you?

I don’t have the tools to do so…

Get the frame number off it and speak to a local Giant dealer.
They will be able to identify the correct part and order it for you.
Regards,
Max.

If its a FSA orbit I’s be very tempted to just rip it out and put something (anything**) else in.
AS far as I know they are all 37/45…

I do two options on headsets… cheap as chips 45/45 (Nukeproof/Brand X) or Hope if you don’t mind the initial investment.
I pull the forks off for lowers services anyway so a bearing set only needs to last 50hrs riding.. and be cheap to replace … or you can get Hope (or better) and just wipe and add new grease for a decade or longer…

The last FSA headsets I replaced got replaced with either Brand X or Nukeproof Neutron and the whole headsets cost less than the bearings.