I set my cruise at 57. Tows good and great fuel millage.
I have seen some damage that some trailers had with blow outs.
Some blowouts have even messed the floors up on trailers etc.
I get around 13.4 mpg towing my Rockwood 8325ss with 2014 Silverado 2500 duramax.
My trailer is 35 ft long with a dry weight of around 7900 lbs.
Not sure where you got your information Seadog but there isn't a tire that is meant for the highway that is rated for less that 75mph. S rated is 112mph. You may not want to tow anything faster than you can do so and handle/react in a safe manner but it is not the tires that are holding you back unless you are exceeding the weight index rating they were made for.
L 75 mph 120 km/h Off-Road & Light Truck Tires
M 81 mph 130 km/h Temporary Spare Tires
N 87 mph 140km/h
P 93 mph 150 km/h
Q 99 mph 160 km/h Studless & Studdable Winter Tires
R 106 mph 170 km/h H.D. Light Truck Tires S 112 mph 180 km/h Family Sedans & Vans T 118 mph 190 km/h Family Sedans & Vans
U 124 mph 200 km/h
H 130 mph 210 km/h Sport Sedans & Coupes
V 149 mph 240 km/h Sport Sedans, Coupes & Sports Cars
Prior to this year, ALL ST tires were only rated to 65 mph; probably still a lot of them sitting in warehouses.
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Danny & Darlene
2002 Silverado 1500HD
2014 Rockwood 2703WS 'Emerald Pkg'
Days camped 2015=42 2014=48 2013=41 2012=47 2011=18
Give this a read Ken Tire Tech Information - Trailer Tires vs. Passenger Vehicle Tires Thats just one place I got my info. Read my post I'm talking about my rig and my C tires that are ST (special trailer) type and rated at 65 MPH. The speed I tow is up to me and has nothing to do with my ability to handle/react nice disguised slam. OK I'm going to slowly go to the fridge and make myself another gin and tonic.
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Retired Navy
Jake my sidekick (yellow Lab) 10/04 - 05/20
2017 RAM 2500 CC 4X4 Cummins Diesel
2016 Flagstaff 26 FKWS
AF&AM & El Korah Shrine of Idaho
I don't get in a hurry and we enjoy the ride, retired and loving it. I tow between 55 - 60 mph on the speedo, that's my comfort zone and the best MPG towing. My speedo reads about 4% slow because of the taller than OE tires.