I have Nitto 555 P285/40ZR-17 on 17x9.5 Fikse Profil 5S wheels with 5.625" (5-5/8") back spacing on the rear of my 65 El Camino and they fit just fine. I had planned on 17x10 with 5-7/8" B.S. originally but ultimately decided against it. I have no rubbing/interference issues at all even under hard cornering.