Thought it was 31 1/2
14"
the size is on the side of the tire
The tire size for the 2000 Pontiac Grand Prix varies slightly with the model of the vehicle. The average tire size is 225/60 R16.
1949 Pontiac Chieftain Eight Series 27 tire size is 7.1 x 15".
The standard tire size for a '66 GTO is 7.75x14.
Pull off the right front tire (passenger side) and you will see it.
Recommended tire pressure is 32psi.
The OEM size is 7.1x15"
14inch
6.70x15
The tire size should be P225/60R16. To verify the tire size there is a Tire Information Label on the inside of your trunk lid.
P225/60R16 is the proper factory tire size.