Current 31++ 265 70 R16 Tires. R means radial, which is the most widespread category today. 265/70r16 tires have a diameter of 30.6, a section width of 10.4, and a wheel diameter of 16. After the slash, there's the aspect ratio, which tells you that your tire's height is 75 percent of its width. The circumference is 96.1 and they have 659 revolutions per mile. 265 70 R16 Tires - 265 70r16 Grenlander Maga A T One 112t The circumference is 96.