Yes you can replace 265 with the 245 size tire. Since this tire size is optional and for the truck, you will have no problems with it.
What is the difference between a 265 70R16 and a 265 75R16?
Going from 265/70 to 265/75 is increasing the height, or diameter, of the tire. The tire will be an inch taller. 265 is the width, so stock size is 265 millimeters wide. The speedometer will be a little off because the taller tire does not rotate at the same speed as the stock size.
What is the biggest tire you can fit on a stock Toyota Tacoma? The biggest tire you can fit without a body or suspension lift and stock Rims are 275/70/17. Fitting 33-inch tires i.e. 285/70/17 on a stock suspension requires modifications to the front fender liner and rear fender flair.
What size tires come on a 2020 Toyota Tacoma?
The tire sizes on a 2020 toyota tacoma are p265 65r17.