I found this informative article online, you can read it in case you are still trying to figure out what size to install on your Hilux:
https://www.vmn.com.au/resource-centre/what-hilux-tyre-and-rim-fits-and-how/
Another thing, you can find an extensive selection of all-terrain tires in 4WheelOnline if you haven't purchased a set. You may want to read reviews to find out more about these tire models: BF Goodrich All Terrain TA KO2 and Toyo Open Country AT.