Does anyone know the original tire size for 1963 Pontiac Parisienne convertible

65Camino wrote:

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Would it not be in the Owners Manual?
If you happen to have one, that is.

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 Checked my owner's manual.....it's there.

Regular Production except Station Wagons and Convertibles.....................................7.00 x 14

Convertible.........................................................................................................7.50 x 14

Station Wagons...................................................................................................8.00 x 14

All 327 Engine equipped vehicles except Station Wagons.........................................7.50 x 14

All 409 Engine equipped vehicles...........................................................................8.00 x 14

Tire Conversion Chart

https://www.tirerack.com/tires/tiretech/45_conversionchart.jsp

Thanks for info Urban

You have finally cleared that up for me . Thank you Greaser !