I am using 15x8 Chevy pickup wheels on the coupe, with the rears offset deepened so I can run the 255s but still use my "Disk Brake" hub caps and fender skirts. Going to a 275 will require some clearancing, which I will do on the ragtop. Don't think I will need to go to a "mini-tub", but we'll see. Not running skirts on the ragtop.