Tires—I'm thinking I have lot as I look at the back wall of my detached garage. Here's the list, in size order:

five 255/50R16 BFGoodrich g-Force Sport COMP-2 (summer tires, including one reserve, for the 1985 Corvette for driving)

four 255/50R16 Goodyear HP Ultra (all-season tires for the 1985 Corvette for NCRS judging)

two 245/45R17 Michelin Pilot Sport A/S 3+ ZP (all-season run-flat front tires for the 2003 Corvette)

two 245/40R18 Bridgestone Potenza RE960AS Pole Position (all-season run-flat front tires for the 2012 Corvette)

two 245/40R18 Goodyear Eagle F1 GS-2 EMT (summer run-flat front tires for the 2012 Corvette)

two 275/40R18 Michelin Pilot Sport A/S 3+ ZP (all-season run-flat rear tires for the 2003 Corvette)

two 245/45R19 Dunlop SP Winter Sport 3D XL (winter tires for the 2017 Impala—two others did not survive last winter)

four 245/45R19 Goodyear Eagle RS-A2 (all-season tires for the 2017 Impala)

two 285/35R19 Bridgestone Potenza RE960AS Pole Position (all-season run-flat rear tires for the 2012 Corvette)

two 285/35R19 Goodyear Eagle F1 GS-2 EMT (summer run-flat rear tires for the 2012 Corvette)

Hmmm …