ok so i did it i got some 4x4 fenders and then i rolled the lips for extra clearance but is this going to be enough to clear my 245/40R-18 with a +10 offset
No. . I may be wrong but I don't think I am. . I think the avalanche rims that CL had were like 27mm offset and cleared by like 1/16" with 4wd sheetmetal. . .