The rears are 18x12 with 5.375" bs, and the fronts have not been measured yet.
The tire sizes are 335/30/18, and 275/35/18
sorry I don't really have any detailed pics of the tub stretch.
I tried to explain it below but it is kind of hard to follow. (sorry it's late)
First I drew a line on the tub where I wanted to cut it, I made the cut go quite a ways down the tub.
Then I put the 1/4 panel back on and clamped the inner tub to it; then I pulled them out to where I felt the 1/4 would still fit properly(gaining about 3/4"). Then I tacked a brace to the inside of the tub to hold it in place.
When I pulled the 1/4 off again and shaped the lip it looked something like this^^
Next step is filling in the gap with some new 16 gauge metal.
Note during the shaping process I had to cut the structure out and trim it up in order to raise the tub for more clearance.