The 265 50 R20 is a tyre with a 225mm width and an aspect ratio of 55%. This means that the tyre's height is 55% of its width. The R in the code signifies that the tyre is made with radial ply construction, while the 20 means that it fits wheel rims that are 20 inches in diameter. Tyres have one last combination of numbers and a letter at the end of their code. This tells you the maximum capacity of each tyre, as well as its top speed. A 265 50 R20 107T is rated for a load of 975kg for each tyre, at up to 190km/h.
265 50R20 tyres are suitable for a range of larger vehicles. These include 4WDs and utes. There are both low end and luxury vehicles that can use these tyres.
Ford Everest, the Jeep Grand Cherokee, the Lexus GX, the Mitsubishi Pajero and the Toyota Fortuner.
Some drivers prefer narrower tyres because they offer a smoother and more efficient ride. If you are thinking about something along these lines, perhaps something like the 255 55 R20 would be a good option.