Would changing to 265/75/16 size tires on a 2.7l be a dog?

Ended up getting a 2012 2.7l reg cab with 265/75/16 from PO. I also have these stupid blocks and its a nightmare driving, that may be the problem. But going to the 265/75/16 size from the stock 245/70/16 would make much of a difference? Im finding 1st and 2nd (typical I know) kinda choppy and I have to rev it up when I stop and then go. Unless its flat (typical again for 2.7) I run in 4th the whole time usually on the interstate.

 

If they are E rated that might be the problem.

 

That is over 2" more than stock. Plus if it is a heavier tire it will effect performance. I went from 245/75/16 to 265/75/16 with my 4.0 and the difference in negligible. But that is only about 1" different with a more powerful engine.

 

Crap. There were LT's on it before actually and that wasnt a problem but were switched for ride. They are open country E I think.
The reg cab is 1000 pounds lighter then the v6, but I hav only 159 hp. So I should have gotten 265/70/16, its rated for that.

 

I was considering the 265/70R16 which is 1/2" larger diameter than the stock size 245/75R16 tires, but will stick with the original size as replaced with Michelin Defender LTX MS last August (about 3k miles so far, after 19.5k on the first set Dunlop Grand Trek ATs that had timed out). Since the speedometer reads 10% higher than actual, the 1/2" taller tire might help, but but the additional 20mm width likely won't translate to any fuel savings. Thanks.

 

You might need a tune up? My regular cab on 33 e rated mud terrains can keep up with traffic in the flats no problem. Hills/mountains/towing I do have to downshift to maintain the speed limit usually. Really steep hills I’m in 2nd engine screaming and in the slow lane.

 

Thanks so much, I needed input from a reg cab owner. Most people dont know the reg cab is 1000 pounds lighter than v6 or even 800 with the 2.7 in the access cab. Mine also dips when banging through the first 2 gears so it could be that. Once its going its fine and in 4th on the interstate, In hilly Vermont. It might just be a combination of the crappy suspension and the typical 1st 2nd gear standard problem. 33's wow, that must look really cool. Did a tune up recently.

 

So what tire size would you recommend I go to?

 

Go with the door sticker tire size. As The Car Care Nut says, Toyota engineers vehicles well (including the OEM parts) so "If it ain't broke, don't fix it." Go with what works. It was also written in the book, "How to Keep Your Toyota Truck Alive" in the mid-1980s that these trucks were built with a balance between power and braking, so take care when changing things to maintain that balance.

 

Your absolutely right its how Toyota engineered a truck that gets 24.5 mpg. I still don't believe that.
20mm difference between the 245 vs 265 burns more fuel. Some one said its just a matter of getting used to the way it shifts with new tires. Im 1000 in so not sure if I can do it all over again. Thanks though.

 

I have a 2010 regular cab 4x4 with the 2.7 I run Falken wildpeaks 10 ply load e 265 70 17, I did take a very slight hit on mpg but driving wise the 2.7 can be a dog no matter what. My tires didn't really make a difference

 

Im thinking of replacing the rear diff gearing just for that reason, dog. Dont know how that translates from the 17" compared to the /75/