265/70/18 275/70/18

picture of '18 with 285's

or not, could we make it any more of a PINTA to post a pic?

I have run 275/70/18's on my 2015 with zero issues. The tires were EXO Grapplers.

I have been running 285/70/18's on my 18. This took a little more work. The rim offset is -12 so they extend to just beyond the factory frame work. I have Bushwaker flares on it this offset had an effect on the tires. I had to pull the interior wheel well material back and tie it off with zip ties. I also had grind a little off a couple areas that protruded into the tire. Very small and was able to do with the tires on using a small angle grinder. It is tight but looks great. Took a little bit of a mpg hit with these tires over the 275 which was a slight hit over the 265. The EXO's are a HD tire and weigh up a bit more than many others, so depending on your tire your mpg may vary. There is a an offroad company here that makes a front bumper extension that adds some room by extending out the bumper a couple inches. I have a Ranch Hand Legend grill guard or I would do that.

I have a 2016 GMC 3500HD and am considering 285/65-18's. You get the same small increase in load rating but the overall tire height is the same as the stock size. It is a nice little increase in width, and everything I've read says it should fit without problem.

Don't have a Dmax. Got a CTD. Went from pizza cutter 245/70/17 to 275/65/18. My speedo is off by about 2-2.5 mph. Other than that I noticed no drop off in pulling power when towing. What I did get was a better mph vs rpm range. Before I would be in 5th and and taching a little high for cruising in the mtns. 6th dropped the rpms to low. Now 5th is perfect when running in the mtns. MPG dropped about 1-1.5 partly because I went from Michelin AT's to BFG KO2. My jump in size is a bit more than yours so guessing you won't notice much difference at all.

It won't make any difference with the truck you've got. Don't forget about your spare, though.

Busdriver wrote:
Have a 2016 Chevy Duramax. The tire that came on it are 265/70/18 . Think when I need new tires going to 275/70/18 . I know that it will change the rear gearing . Has anyone went with the larger tire noticed any real world difference.

No, I have not made that change, but I don't think you would notice any gearing change, from that slight difference in actual diameter, especially with a diesel.

Jerry