still showing 614 revs per mile. dont know what to tell ya. i tried that other calculator and it shows what that other member said, but so you know, the one i used was recommended to me when they sold me my SCT and it is what i used when i had my tunes written. go with who ever you choose.
I agree with the 614, i calculated it by hand, both calculators said the circumference was 103.1" so u figure 5280 feet per mile so thats 63360" so 63360/103.1 = 614.54 so i would say that 615 would be fine, especially if you figure tread wear will only increase that number.
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