head set size

[ghost66]

i have a carerra vanquish, can anyone tell me the size of the head set bearings that i require, as the bike has been upgraded to tiagra hollow tech bottom bracket, 10 speed shifters . i am finding that the forks are loose in the frame

 

[Dogtrousers]

I can't answer your question but if you read the link below you'll know a whole lot more about headsets

,https://www.parktool.com/en-int/blog/repair-help/standardized-headset-identification-system

Or maybe you already know all that. Anyway, I found it interesting when I read it.

 

[fossyant]

If lucky, if you take them out the various sizes are printed on the side. If unlucky it's worn off.

 

[Ming the Merciless]

Have you done anything with the handlebars of late? The stem cap might not have been tightened correctly before stem bolts redone. Might be nothing wrong with headset bearings.

 

[Ajax Bay]

Yes, before you head for the 'replacement' route, just refit the stem correctly and see if that tightens things up. It is highly unlikely that the headset bearings on a bike like this have worn, unless it's been thrashed to within an inch of its life for years.
And noone will be able to answer your Q with the necessary assurance.