OP doesn't say what truck he has but reading between the lines from info he does give!
I wonder if terryrey is aware that in able to use the 285/75/16 "E" tires with the 3750 lb rating you first must trim away some of the inner fender on some trucks and preload the front torsion bar enough to clear the larger dia wider tire when turning sharply or it rubs. It's still extremely close even after doing this. Also that you will need to purchase wider wheels (rims) for the wider bead to bead width distance of the 285's. 265's are as wide a tire you'd dare put on the OEM 245 tire wheels. A local tire shop installs the 285's quite often on pickup trucks as owners use the wider tires with low air pressure on the soft sand that's around here. Also in the sandunes where it's allowed in our region.
I also had thought about going to the 285's but changed my mind after seeing what was involved. A cranked down torsion bar makes for a rougher riding truck. The 285's also alter the tranny shift points even more as the tires turn at a lower rpm because they are a larger diameter at the same actual road speed as the 245's or 265's. Of course, you could pay some more money to have your odometer and speedometer recalibrated to match the new tires rpms but depending on the truck, won't fool the tranny's shifting points. Actual ground speed will be close to 60 mph before OD/lockup engages. Low 50's with OEM 245's. There will be a loss of pulling power as the engine rpm will be lower and like having a 3.42 rear ratio VS a 3.73 rear ratio the it is.
Much more to it than buying new 285 tires and slapping them on!
A superb CC LB 4X4, GM HD Diesel, airbags, Rancho's, lots more
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