That's what I was thinking I wasn't too worried about that clearance because I could always go with a bigger spacer If needed for hitting the spokes, I was concerned with the inside diameter of the rim coming in contact with the caliper in the 14.25" rotor kit. The fitment guide that they want you to print out and try looks like Spanish to me. It does say it fit in the 350z with the stock 18" rims. So I'm just wondering how much different the caliper mounting is on that vs the 300.