Daddy, the tires in the package are the same outside diameter, 35", as stock.
U can put 37" tires on stock rims since most are the same width, now if u go a W I D E tire u may need a wider set of rims.
The hole in the center of the tire is 1" bigger than stock so the sidewalls are a 1/2" shorter.
These tires shouldn't effect performance.
Some companies make 36" high tires so u don't have to go to 37" and since u want new wheels to the rim size won't matter as long as u go 16" or larger.
I tried a set of Super Swamper 12.5x36-16.5 on mine and they cleared fine, really cool looking on the H2
but don't think they will do good on packed snow
.
W/ the future 4" lift u will want something in a 37 or 38" tire to look right after the lift or u will see small tires and big fender wells.