.
I like to use these combinations for my current setups:
149s on 8.38 with wheels no wider than 34 mm (Classic 54 / 55, Radial 53 / 54, Conical Full 54 mm)
149s on 8.5 with wheels around 35 to 36 mm (Classic 56, Radial 56 mm or similar)
159s on 8.62 with wheels around 35 mm (Classic 56 or 58 mm)
159s on 8.75 with wheels around 35 to 36 mm (Conical Full 56, Classic Full 56 mm or similar)
169s on 9.0 with wheels around 35 mm (Classic 56 or 58 mm)
The axles might sit just in or just out on certain board widths, but using different wheels and also where washers are, eg three on the inside, or only one on the inside, will give a bit more width or a bit less width.
I like the wheels to sit in line with the board, not outside though, but can sit slightly inside.
When I had the 8.125 black eagle I had 139s on it with fat wheels, but then went with 144s with more normal width wheels which worked well too.