I've had the Nitto Tera Grapplers on my 4Runner about a year now in the stock size. Great performance and tread wear. I've had them in sand, snow, mud and they perform good. Not so much in the rain but not a deal breaker.
Strangely enough, the GPS speed and 4Runner speedometer are now closer after installing the 285/70 Nittos. Handling improved more than I expected. All this and I am still over 20 mpg on the interstate.