Towing with a Toyota Sequoia: wheel size question

RIm diam as mentioned, does not matter, a 256-75-16 and a 265-70-17 are both the same overall diam, width, tire patch, revs per mile etc etc. You might get better mpg with the 17" tire vs 16, as the sidewall will not flex as much etc. Braking is also better with the lower profile tires......There are bad parts too, ie off roading is better with the 16" tires, as you have more sidewall to work with if you air down, ie like 10-20 lbs vs 40-80 depending upon load rating of tires etc.

Marty