Oh, now I get it! Boy, that image of a wheel passing you on the road is a wake-up call for sure. Thanks for clarifying for this newbie. I will be super diligent after I have my first tire event. Hopefully not for a while!
Just one more thing...most all OEM tires on RV/TT's are what owners eventually call; 'China Bombs'! They have (unfortunately) a high incidence of side wall blow out, or tread separation off of the carcass. This mostly happens (when being reported by owners...) is when O.E.M (Original Equipment Manufacturers) tires as delivered on your new, or even late year, re-sale, RV/TT...
is pretty much rotating upon the roadway, BEYOND 60 MPH. Mostly at 65-70 MPH, is when the carcass gets hot enough to compromise the side wall, or tread cap on the tire carcass.
Solution? Get full service life of the tire, in tread depth, and always better MPG, if you stay at 55-60 MPH, (no higher...your choice of course!) when TT towing, or even operating a motor-home.
I personally, want the best and most efficient bang for my fuel buck...so, I will never go over 60 MPH, while on interstates, or secondary two lane county highways, unless in passing a slower transport truck ahead in my lane. Then, back to 60 at cruise. Secondly...IF...you ever have a blow out on a single axle tow...man...you want to get over to the side of the road ASAP...and not hopefully, trying to control a widely swaying TT at 65-75 mph! That's why dual axle (Tandem) trailers are simply the most safe undercarriage TT you can own. If you suffer a blowout, you still have one inflated tire on that side to take you down and over to the side of the road, or better yet, off the road into a Travel Centre.
Just some things to ponder, as you create your own personal vacation tow, 'M.O'.... For myself...60 mph...is plenty, (and max speed), as you tow a multi-thousand pound load behind you. We/I are on vacation...and should allow road time, built into those vacation plans. Just my thoughts.
Happy, and safe (always!) trails...
Sun Seeker