Attempted to establish a baseline for fuel economy/mpg at 65 mph, with the 35.4″-tall, 295/65R20 Cooper STT PRO tires under a heavy Hallmark flatbed truck camper outfit. There was too much wind for this to be a true baseline, but efficiency was still good for this not-aerodynamic configuration; just under 13 mpg. I probably will revisit this in the future.
Recent photoshoot (June 2020) with Cooper Discoverer STT PRO, 35.4″-tall, 295/65R20 tires. My 2014 Ram crew cab with Cummins Diesel and stock-height suspension was the model. Pressures were 27 in front, 17 in the rear.
Disclaimer: As with all things, proceed at your own risk, only you can decide what is appropriate given your training, experience, knowledge, the conditions, etc.
Mount and balance, and first look at the 35.4-inch tall, LT295/65R20 Cooper Discoverer STT PRO tires I’m running on my diesel truck(s). There will be more in the weeks and months ahead, here, and also @RoadTraveler on Instagram (typically extra content in Instagram stories).