The 2015 Buick LaCrosse tire size depends on trim: the Base, 2.4L Eng VIN R, Trans Mfr CD 6T40/MHH takes P225/55R17 95H; the Base, 3.6L Eng VIN 3, Gas/Ethanol takes P235/50R18 97H; the Base, 2.4L Eng VIN R, Trans Mfr CD 6T40 takes P225/55R17 95H; the Leather, 2.4L Eng VIN R takes P225/55R17 95H; the Premium, AWD, Gas takes P235/50R18 97H; the Leather, 3.6L Eng VIN 3, AWD, Gas/Ethanol takes P245/45R19 98V; the Leather, 3.6L Eng VIN 3, FWD, Gas/Ethanol takes P235/50R18 97H; the Leather, 3.6L Eng VIN 3, FWD, Gas takes P235/50R18 97H; the Leather, 3.6L Eng VIN 3, AWD, Gas takes P245/45R19 98V; the Premium, AWD, Gas/Ethanol takes P235/50R18 97H; the Premium, FWD, Gas takes P235/50R18 97H; the Premium, FWD, Gas/Ethanol takes P235/50R18 97H, per the factory service manual.
Factory-Spec Tire Size
Varies by trim
Base, 2.4L Eng VIN R, Trans Mfr CD 6T40/MHH: P225/55R17 95H
Base, 3.6L Eng VIN 3, Gas/Ethanol: P235/50R18 97H
Base, 2.4L Eng VIN R, Trans Mfr CD 6T40: P225/55R17 95H
Leather, 2.4L Eng VIN R: P225/55R17 95H
Premium, AWD, Gas: P235/50R18 97H
Leather, 3.6L Eng VIN 3, AWD, Gas/Ethanol: P245/45R19 98V
Leather, 3.6L Eng VIN 3, FWD, Gas/Ethanol: P235/50R18 97H
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