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https://www.bfgoodrichtires.com/tires/all-terrain/all-terrain-t-a-ko2.html if you click on 275/65-20 it states 34.1. The 275 60 20 or stock size on 20s is 33. The metrics run pretty true to size. The imperials like the 35x12.50 are a bit undersized. Bfg for example claims 34.5 for theirs.DanRob, you should also know that the 275/65-20 doesn’t actually measure 34”. It’s barely over 33”. I found this out when I went to calibrate my speedometer using supertuner. I think I ended up calibrated at 33.25”. Apparently tire measurements are all goofed up. I will say that I do like the taller sidewall vs the 275/60-20