Just came back from the Rally (in Syracuse) and it seems to be the consensus that you replace ties at 5-6 years. My tires were made on 9/07 so I am ready to bite the bullet. Got a quote from a local, ...
My tires was 6 years old, still looked good, had 14,000 miles on them. Paid $419.00ea. for new ones, I just replaced the steers, didn't think I had to replace the back ones, still looked good. Felt more safe to replace just the steers.