Yea the spacers that come stock on every ford f350 with western buds rarely roll over a million miles.
the 1.5 spacers on my bud's Rocks only (not even close to street) TJs (4.5 long with one on 37s and one on 40's) haven't held up very well either. They are darker and less shiny now than when they were new. Cant have that.
You want at most 4.75 (1.25 spacer with stock wheel) to min 4.25. You can get by with more but will have to be careful of rubs. The 4.5 9" wide really is the best approach though.
J Wm Bishop EA, ASADE
Classy Chassis Customs. Because the only thing that matters is what's UNDER the dress ...