How much harder on your ball joints, steering, and wheel bearings to use wheels with backspacing around 2.5" rather than the usual 3.75? and the same for using a 1.5" spacer. Are wheel spacers safe, a weak link? Any info would be great. I am interested in the spacers for the rear of my k5 and was wondering about the rim question to make my 81 CJ7 (I know, you all hate jeeps) axles closer in width to the wide track axles of later year jeeps.