Tire ratio Guru?

[CMaster808@aol.com]

Ok for all you mathmatical wiz's

The speedo has an error factor  ( x ) due to the od trans installed,

can't tell you what x equals.  If I where to replace the tires with new

and changed the size (Y) . would x + y = original reading, or close to

at the speedo.   And just what would the size of Y be,

                           Chet

       Another mind bender