[s-cars] RE: Loss of mileage

rebank at juno.com rebank at juno.com
Thu Jul 4 01:13:23 EDT 2002


FWIW, It is NOT the difference in circumference.  225/45 has a
circumference of 78.5" vs 78.6 for the 255/40.  Revs/mile are 808 vs 806.
 Speedo error of 0.2%.

Speedo is calibrated for the 225/50/16.  With the 255 the speedo reads
0.7% too slow.  A close match, I'd say.

Edward



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