When we bought our '02 GT 325 in 2010, it had the original GY tires that Ford put on the chassis in 2001! They only had 12,000 miles on them, but at 9+ years old, I didn't want to take any risks.
We did one shakedown trip, and I found the tires to be very harsh riding and noisy. We've used Les Schwab Tire Centers for all our vehicles for over 35 years (except the time we lived in Tidewater VA) and their service has always been outstanding. I went into the store in town and said I'd be bringing a newly purchased MH in. He looked it over and said he'd check warehouse inventory for the most recent manufacture date on a set of Toyos. He found a set that were only 6 weeks old.
All 6 tires, all new CRES valve stems and a front-end alignment cost less than $2400. The Toyos' ride is much better than the GYs and they're quiet. Your 'handle" doesn't show whether you're far enough west to have access to Schwab's stores, but I wouldn't go anyplace else.
Frank and Eileen
No longer RVers or FR owners