I clipped the below from this site and figured I might be able to get away with a 255/40 up front:
https://support.apexraceparts.com/hc...-Fitment-Guide
"Staggered Setups
Maintains stock-like handling characteristics, tires can only be rotated left to right. Maximizes both front and rear tire width.
Front: 17x9" ET30 with 235/40-17 tires
Rear: 17x10" ET25 with 275/40-17 tires
Direct fit.
Popular fitment.
Front: 18x9" ET30 or ET31 with 255/40-18 tires
Rear: 18x10" ET25 with 275/35-18 tires
Front negative camber required"