I wasn't sure since my current tires are 275/55 and it is only 60 series so I wouldn't think it would be that much wider.
The 60 is actually referring to your sidewall height, which is the percentage of the tire's width which is the first number in mm. So 355mm is 13.95 inches wide. So 60% of that is 8.37 inches, which is your sidewall height.so if you multiply that by 2 and add 20" for the wheel diameter, you have the tire height.
So that tire is pretty much 36.75 inches tall and 14 inches wide. Just thought id share my knowledge as a tire guy.
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Because of the offset on OEM wheels, it'll also be harder to go with a bigger tire like that, you run into problems with the tire rubbing in suspension parts or the inner wheel well. I think you'll be much better off with a 325/60/20 or a 35-12.50-20.