The 2017 Ford #17 … Falcon should have the same tire width steps as the two other V8 Supercars.
Ford front & back: 280/345
Holden front: 280/290/300/325/345
Holden back: 280/290/300/335/355
Nissan front: 280/290/300/325/345
Nissan back: 280/290/300/335/355