What is my RPM for any given speed/gear?
01-29-2010, 02:21 PM
Road Master
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What is my RPM for any given speed/gear?
I'm looking for the formula for determing RPM. Here are the specs from HD's website for my bike:
Primary Drive = 34/46 ratio
Gear Ratio (overall) = 3.407 for 5th gear
So say I'm going 60MPH in 5th gear, how would I calculate the RPM?
01-29-2010, 02:25 PM
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01-29-2010, 02:26 PM
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01-29-2010, 02:27 PM
Road Master
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Originally Posted by
cadman311
Wheel and tires size
Rear wheel is 180/65/16
01-29-2010, 02:39 PM
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When you see three of everything,,,,,,, SHIFT
01-29-2010, 02:55 PM
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01-29-2010, 02:58 PM
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01-29-2010, 02:59 PM
Road Master
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Originally Posted by
cadman311
measure around your tire
Tire diameter is 25.213"
01-29-2010, 03:01 PM
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I guess I'd also have to know what my final drive ratio is, huh?
01-29-2010, 03:05 PM
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See chart for help. Harley like 78 to 80 in. Mopad tire would be 25 in.
