Looks like most tire mfrs recommend 8.5" wide rims as minimum for 255/40R18 but 8" min. for 255/45R18.
Apparently the profile has a bearing on it.
14 V6 auto, MCA, PP, BBK Shorties, MMD Hood Struts, Borla Touring A/B's, MAC ProChamber, aFe drop-in Filter
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