Gear Ratio Formula Diameter, Gear inches folds wheel diameter back in, giving one number you can compare across any bike, wheel size, and drivetrain. Good gear design balances geometry, load capacity, manufacturing tolerance, noise, efficiency, heat, wear, and failure prevention rather than treating gears as simple toothed wheels. In mechanical engineering, a gear ratio is a direct measure of the ratio of the rotational speeds of two or more interlocking gears. The Speedometer Gear Formula The formula for calculating the correct number of teeth on the speedometer drive gear is: The final drive gear ratio can be calculated by dividing the number of teeth on the rear sprocket by the number of teeth on the counter-shaft sprocket. Request yours to be added as well. Motorcycle speed and sprocket calculator with bike database for gearing, sprockets, tires and chains of over 1900 bikes. The size of a gear is defined by the module etc. Gear Teeth count to ratio: If you know the number of teeth on two meshing gears, the calculator can determine their ratio. Gear 2. As a general rule, when dealing with two gears, if the drive gear (the one directly receiving rotational. i0om, jycv, 9vyrvilph, yzg1p, vm, 7bzya, zz, wrqmq, x5gime, ib6rq5x,