I got a 06 SD with 8" Rize lift and I bought some new rims that are 20x12 with a 37x13.5 tire but they rub real bad on the inner fender when turning and on uneven ground.Whats involved with a trimmin the fender?Will the flares I have fit after trimming or can you order bigger flares not sure how to go about that.The 20x10 inch rims seem pretty good with that size tire but now Im stuck with this other set of rims.