They're 35x12.5 but the mud grapplers always look wider due to the crazy huge side lugs. They're amazing tires. I'm still running open diffs front and rear and the others on the run we're pretty surprised at what I could get through. When you get them down to like 5 PSI the side lugs almost touch the ground. I'm sure you find the same with your set. How are yours wearing? I have about 10000 miles on mine and they still look brand new.