You know what they say about opinions...
I tend to prefer taller sidewalls for looks and the 45/40's seem to recover faster if you lose tracton in a corner. This may not happen with every brand of tire however or maybe I'm a much worse driver than I remember...
SWs red 73 TA had 255/40/18s (4.5bs) and 295/35/18s (5.5bs) on 18x8f & 18x10r without any mods to the car and they didn’t rub. But again I like to run a taller tire with more sidewall to visually fill up our huge 2nd Gen wheel wells…
You could run a 295/35/19 out back and have the same sidewall as the 255/40/18 up front… that would net 26”front & 27” rear diameters. The 45-series on the 18s all around would net 27” front and 28.5” rear. But that's a really tall tire out back and a lot of rotating mass.
I looked for a happy medium and found the 295/40/18 that Falken is now making in their 615 series. Sticky street tire that'll work better at the track and will probably work better when street driven too. JMHO
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