Re: 4:11 ratio vs. 3:78
Here is how to figure how fast you will go for different gear ratios.
Engine RPM, DIV BY GEAR RATIO EQUALS RPM OF REAR WHEEL, TIMES CERC OF REAR WHEEL EQUALS IN PER MIN, DIV BY 12 EQUALS FT PER MIN , TIMES 60 equals FT PER HR DIV 5280 equals MPH.
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