Originally Posted by
Airburst
OK, so I have a 1 1/8" threadless headset on a mountain bike. It uses cartridge bearings, but they've got really rough. Adjusting the headset doesn't help, so I figure the bearings must be worn out. Is there some sort of standard for the cartridge bearings used in headsets?
Thanks
Either the headset will tell you what bearings it use or you can pull them and measure the bearing seat. There are various integrated "standards" for bearings. This page gives a brief overview. Alternatively bring those bearings into a shop if you are unsure.
http://www.parktool.com/repair/readhowto.asp?id=68