Originally posted by v6ranger:
...The other tire still at 9/16 tread depth...so is that 1/8th of an inch enought to make a difference?
...
Rotate the front tires to the back tires, and you should be fine. (I did this when I had my Chevy Celebrity at 160k miles).
For my Contour at 45 K miles, I replaced two new ones (had an extra few bucks this time
) and kept the good one as a spare. Came in handy 7 months later when I blew out the passenger rear tire when I hit a steel inlet curb. 
Last edited by Tony2005; 10/16/05 09:22 PM.