RE: tire size
225/60-16 is stock.
225 is the width(mm). 60 is the sidewall height ratio(i.e. 60% of width). 16 of course is the rim size. The sidewall height is calculated by multiplying the sidewall ratio times the width. The overall tire diameter is the sidewall height X 2 plus the rim diameter.
So 225/60-16s are about 8-7/8" wide, 26-5/8" diameter.
And 225/50-16s are about 8-7/8" wide, 24-7/8" diameter.
Actual dimensions are usually given by the manufacturer.
BTW, you could probably run this size but I would not recommend it - just my opinion. I would stay at stock size as a minimum.