so effectively the wheels at 17x9 +20....that is medium in the realm of offsets....you should easily be able to fit that stock fender. mikes vert is running a 19x9 0 offset with 20mm fender and he sits flush, his tires ARE unstretched also. im sure with a little lov we can get them to fit perfect, just like jonas said.....2 business cards and NO rubbing. g/l!