Quote:
Originally Posted by Tom Wesenberg
I agree with George and would want a faster ratio or overdrive if I went to a smaller tire. The Model A has a long stroke (4.25") and runs best at speeds of 2200 RPM or less. Even my 1950 Studebaker with a 4" stroke and overdrive (final ratio with OD is 3.19) kicked in sounds plenty wound out at 55 MPH.
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I hate to be the one to correct the Master, but...
The size/diameter of the wheels themselves has little to do with this. What you need to look at is the rolling radius of the tires fitted to the wheels. My figures show that 6.50-16 tires generically have about the same rolling radius as 4.50/5.00x19. Individual makes will vary. You need to study a Coker catalog to choose tires that match in rolling radius.
Fearless