On my Cherokee I have a RE 3.5 lift and Procomp 31x10.5x15 extreme MTs .
The law stats that I have to have the width of the tier covered and the flap must extend to the mid point of the axial. So I bout two mud flaps from work for $10, drilled 4holes in the metal of my bumper and put them on with nuts and bolts. wont fall off and easy to remove for the trail but they will not hopfully walk away.
I am going to be taking some pics tomorrow and putting them up. I think I read somewhere that I can not directly past them to the post. I have to support them vea another site
.