Drawbacks of upsizing tire size

This one?
https://www.roughcountry.com/speedometer-calibrator-90043.html

 

That’s the one. It’s cheaper than the other guys, but I’m pretty sure it’s the exact same hardware.

 

Thanks!

 

I had a set of the Falkens in that size on mine but SL rated. 1 mpg lost but no notice of power loss. Would likely be different with E load.
The speedo is actually 2 mph off with the stock size tires and switching to 265/75/16 makes it dead on

 

I ran 285/75/16 KO2s that were E rated for 50k miles. They were noisy, heavy, and terrible on slick roads with wear. I downsized to 265/75/16 Kumho AT52 P rated, and so far so good. Snow/ice was great last week. We shall see how they hold up. I still like looks with these, ride is good, mileage increased. I recalibrated my Hypertech speedo calibrator to support new tire size. All good!

 

Several sober experts say the Tacoma is simply not meant for heavy E rated tries, especially if a daily driver.... but the KO2 reach still rages. Very nice tires. E rated is simply a deal killer.