I ordered some Work XT7s in 18x9.5 +38. I have been doing a lot of searching and using the fitment calculators but I'm trying to be sure about tire size befiore I order the tires. I found this threaed: https://g35driver.com/forums/media-s...-teaser-5.html where "bowzer" has the exact rim size as I will. I don't want any tire stretch at all so I think I should go with a 255, his 245 looks a little stretched. My concern is whether or not a 255 will clear and which profile I should go with. Should I get a 255/45, 255/40, or a 255/35? This is what one of the calculators showed for reference on the 255/35 r18. My vehicle is a 2005 sedan 5AT, dropped on s techs with stock shocks. I will be upgrading to Tokico Blues in the near future.

Wheels: Wheel 1 Wheel 2
Wheel size 17x7 ET 45 18x9.5 ET 38
BackSpace 146 mm (5.7'') 171 mm (6.7'')
24 mm (0.9'') deeper.
Rim Lip 38 mm (1.5'') wider
Tires: Tire 1 Tire 2
Tire size 215/55-17 255/35-18
Section width 215 mm (8.5'') 255 mm (10'')
Sidewall 118 mm (4.6'') 89 mm (3.5'')
Tire diameter 668 mm (26.3'') 635 mm (25'')
33 mm (4.9%) shorter.
Rim sizes 17x6 to 17x8 18x7.5 to 18x9.5
Circumference 2098 mm (82.6'') 1994 mm (78.5'')
Revs per mile 767.3 807.1
Speedometer Assuming that this is OEM tire and speedometer readings are correct When speedometer reads 60mph (96.6km/h) actual speed will be 57mph (91.8km/h): 5% slower.
Clearance: Package 1 Package 2
Suspension Assuming that this is OEM wheel/tire and there is no any problems with clearance on both sides Package is 13 mm (0.5'') closer to suspension/brakes components. Acceptable for most cars.
Fenders Package will stick out 27 mm (1.1'') farther. Make sure that you have enough room under the fender. If not, consider narrower tires or higher offset.
Wheelwells 100% clear (leaves even more room than OEM)