worn tire - newbie question

[evillberg]

Hey, I am planning on buying my first 4x4 and am looking at an '89 Suburban. The tires all have a lot of tread except for the front drivers side - it is almost bald on the outside edge. The seller said that he replaced the hubs last winter. Would this fix the problem causing the un-even wear, or could his installation of the new hubs be causing this problem? Also if the problem has been fixed, is it bad to keep driving on this worn tire? Thanks.