I'm already running the Hankook 256's which are LT tires (load range E) and the 285's only weigh 5 lbs more each. I know I'll see more mileage drop but hopefully not as drastic as going from a C load tire to a E tire. It was like an 11 LB increase per tire going from the Crap tires that came on my truck to the Hankook MT's. Unsprung weight does horrible things to gas mileage unfortunately.
Yeah mine are 285/70/17 D Load rating (8 ply). I just need to find an equilibrium between tire sizes and load range/tread pattern. I'll get there!
I am going to hold off on adding a mount for water cans since I usually throw those inside. I am going to have a very stealthy place to attach my high lift back there and I may make it modular so I could add a Jerry can holder in the future.
Sweeeet!
THe auxiliary fuel tank won't weigh much itself because it is being made out of aluminum and the ancillary equipment like the fuel pump, filler neck, etc wont weigh a whole bunch either. All together, I would guess approximately 25 additional pounds for the pump, tank, hoses, etc. I don't plan on filling the aux tank except for road trips and off road trips because you are right on, that extra 14-16 gallons of fuel is heavy ( 15 Gal. @ ~6lbs/gal= approx. 90 additional pounds).
I know nothing about fuel tanks nor would I even begin to know how to install one. Looking forward to seeing how you go about your's as its "an up in the air" idea weiter to or not install one. I love the idea of not faffing around with jerry cans and just being being able to flick a switch as such.
Either way, its gonna be a beastly heavy rig when its all done. I'm saving some weight by swapping the read skid that compliments my bumper from 3/16" steel to 1/4" T6 Aluminum. Having a big solid plate of steel measuring 40" x 20" was too heavy, T6 is very strong and so much lighter. I designed it to bolt on and off separately from the bumper as well as hold the aux. fuel tank so if it is damaged somehow, it is easily replaced .
Good thinking, love that's bolt on, love that your choosing 6061 with T6 temper as as a posed to 3/16" steel, thats a heavy chunk of steel! I'm making notes, keep us posted and thank you for letting me pick your brain!