Weight is a very big part but width has effect to because there is more surface area on the road and the more the surface area the more resistance. For the most part a 295/70/17 is actually a quarter inch taller then a 33X12.50 but is .9 inch more narrow and the 295 will in general give you better gas mileage in the same brand tire. Some brands weigh more then others and can change that outcome.
__________________ 2010 Dark Charcoal Pearl Jeep Wrangler Sport S Automatic
4.88 Yukon w/Trac-Lok rear and Eaton ELocker Front - Synergy Gussets - B&M 70264 Trans Cooler
BDS 3" lift - BDS Fox 2.0 Racing Shocks
XHD front Bumper - Trektop NX - Goodyear MT/R w/Kevlar 35X12.5X15 on MB Chaos 5 Wheels - Thrush Turbo Muffler
I've rad a lot that the Nitto's don't last very long. So I'll have to rethink this. Almost everywhere I've read the BFG's AT KO are very good and long lasting. A lot of good reviews. Hmm, gonna have to take my time on this it seems.