I run 275/35-15 Hoosier or Avon 23x10.5-15 on all four corners. That size works pretty well and is the limit that I can run with struts and the SubtleZ body kit. If I had the SLA suspension, I would use wider wheels limited only by the body work and tire availability. I feel like 10 inch wide front wheels are perfect for these cars, but the rear could use a little more.