You read me correctly , one tire ? We’re talking about changing all 8 tires not one !! I (have a tag axle) Besides New tires blow out also , changing them is no guarantee... and yes after more miles of commercial experience than you’ll ever drive with a “few” blowouts on company tires I stand by what I wrote .. yup I’ll change the fronts 6-7 years and “watch” for a couple years ... ie really pretrip .. on my side with a flashlight he rears (Tread , sidewalls inside and out and between the duals) ... I’d guess something most motorhome drivers never really never do. There’s a great chance those 6-7 or maybe 8 year old tires won’t blow and I’ll be money ahead. By 8-9 I’ll replace. In 20 years of that in my rv’s I’ve had 0 blowouts. Have I have found a tire I wanted to replace on a pretrip ? Yes and I have but ... Hey! I’m already money ahead! Go figure !