2017 altitude 4x4 with 18 stock rims.. if I get just springs could I fit a 255 55 18??? New to this.. any suggestions would be great
Yes, you should be fine with just the springs. The only area of concern would be at the lower spring perch. 255/55R18 is a 29 inch tire. I don't remember if a 29 inch tire clears the spring perch.
What Ed Said.... I'm pretty sure it's going to depend on the rim backspacing, but I'm betting you'll need some 1" spacers and the pinch seam mod, those are kinda universal mods need for a 29" regardless of the amount of lift.