Headset
 

Hi
i need to know what head set to get for a 2010 Giant Yukon.
are they all the same size? does anyone have any favorites to use?
any help will be appreciated

If you Google "replace headset" Sheldon Brown is the first (possibly best) result, but many, many others. All the info you need is there as far as replacement criteria. All you need is an inexpensive set of calipers.

Favorite headsets is another matter - I'm sure you will get some opinions.

bikepedia will give you a sense of OEM, go from there.

Headsets differ in size, type and bearing configuration. Does your current headset have the manufacture's info and model number on it?