You guys are a wealth of information! Thank you for all the replies. The tire that was replaced had 6400 miles on it, so the three remaining original tires have plenty of life and more miles left in them. The new tire will blend right in with the others which also look new.

I'm not a hard driver and never hit the triple numbers on the speedometer, so I guess I'll be just fine with the one replacement tire after reading the above replies. Thanks for the advice.

Bob