Diff Ratio Rear End Gear Ratio Chart. You may also calculate rear axle gear ratio by dividing pinion gear tooth count by ring gear tooth count. In this case 275 is the tire tread width in millimeters 75 refers to aspect percentage of tread width to yield the sidewall height and 16 is the diameter of the tire.
Author jason siu uses more than 600 photos charts and illustrations to give simple step. Which will do math for you. With our rpm calculator you can calculate your engine s rpm based off of your vehicle s speed tire diameter rear gear ratio and transmission gear ratio keep in mind that our calculator does not take into account drive train loss road and weather conditions or the skill of the driver.
Which will do math for you.
This calculator assumes you know the vehicle s transmission ratio. Calculate rear end gear ratio needed todays date is 1 15 2021 calculate your rear end gear ratio needed. This calculator assumes you know the vehicle s transmission ratio. Calculate rpm for given speed mph rear gear ratio and trans gear ratio.
