Differences between 265/60/18 and 275/65/18
I'm planning upgrading from the OEM tires to Goodyear SilentArmor tires in either the standard 265/60/18 size or slightly bigger 275/65/18. Would the bigger 32" tire noticeably help off-road performance? I assume it will hurt the mileage and acceleration a little, and throw off the speedo. I'd also be forced to buy a larger diameter spare as well.
It will make the truck look a bit more aggressive, but I'd like to know that the car would be functionally better with the bigger tires if I have to live with the downsides.
I'm a newbie to off-roading but I hope to be taking it out moderate trails in the Sierras and southwestern deserts once every month or two. This is on a Limited with the ORA2 package.