3.91 gears, trapping at 138 in 4th gear with a 28.8 inch tire you would be at around 6295 RPM
4.11 gears, trapping at 138 in 4th gear with a 28.8 inch tire you would be at around 6617 RPM
This is the math behind the whole thing, good luck.
Rear end gear ratio = (tire diameter)(rpm) / ((transmission gear ratio)(336)(mph))
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2014 1SS 1LE, bone stock for now.
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