Factory 4x4 dually wheels have the most back spacing over the 2wd or Alcoa
Factory 4x4 dually wheels have the most back spacing over the 2wd or Alcoa
And keep in mind there were no factory 4x4 dually's until 1999. Again from what I gleaned, and this is not written in stone, the 5.15" backspacing typically was designed for a 215 width. The 5.35"(steel) or 5.40"(aluminum) would be on a wheel for a 235 width which would have been sold with "traction tires" during that era according to some sales literature.