Tire size question! Yay! (haven't seen the specific answer I'm seeking)

I have an 09 4cyl with the 5 spd. I'm wondering if anyone has put the 10 ply (load range "E") version of the General Grabber on their 4cyl and what that did for performance/mileage? Essentially I'm looking at the load range E tire in the 245/75/16 vs the SL tire in 265/70/16 and am wondering if the larger side of option B will reduce mileage as much as the heavier weight of the smaller tire?

 

Yes it will happen. The difference will be significant. I added 10 ply load E rated Toyo MT 265's to my 2011 2.7 4x4. The mileage dropped roughly 20% and the heavy tires will be a struggle on manual tranny high slope starts (eg City driving in San Francisco).

With that said, I have both the new MT's and the OE Dunlop AT's each fully mounted and I can easily switch between the 2 in about 30 minutes as I have air tools and large jacks. In the summer and spring I'll run the AT's and enjoy the better mileage. In the winter and hunting seasons I'll run the MT's and enjoy the better looks and offroad/snow performance.

 

Thanks for the feedback, with efficiency-ish being my goal I suppose I'll look for an SL tire in the 245 then, thanks!