Are there slightly larger tires for my 2013 4Runner that will fit on these rims?

I have these tires on now: P265/70R17 113X M+S

Pros of the larger tires?

Cons of the larger tires?

This is for 100% road use.

 

Any tire for a 17 inch rim will mount up. 265/70 is an aspect ratio. The tread is 265mm across, and the height (rim to tread) is 70% of the tread width. R17 means 17 inch rim.
You can use this to figure out the size of any tire you might want to install. Up or down a size will usually not give you any major noticeable differences in ride or performance on the highway. In this case it's usually best to stick with the manufacturers recommendation for tire size.
That said, larger tires usually look better than stock and will still travel down the highway just fine. The cons would be that your spedometer might not read as accurately and your gas mileage may suffer a bit. Otherwise, no harm.