3:73's and 26" tires

orangecrush, 26" tires turn 767 revolutions per mile. 767 x 3.73 (gear ratio)
= 2860rpm at 60mph, 3098rpm at 65mph, 3337rpm at 70mph. 27" tires will
drop the rpm by approx 100rpm at any given speed in top gear. With this info
you can substitute any gear ratio and do the math.