Axle gear configuration depends on the quantity of teeth in the rear and Driving-wheel gear. De facto, to figure the true speedometer gear ratio, you Testament obligation to recognize the axle gears and the tire thickness. Once you dispose the speedometer gear ratio, you can choose the Correct locate of speedometer gears to arrive this ratio.
Speedometer gears management the speedometer.Speedometer gears direct how accurately a speedometer tracks quickness. The gears depend on the tire magnitude and axle gear configuration.
Instructions
1. Calculate the axle ratio. Intersect the unit of teeth on your axle bell gear by the symbol of teeth on your axle Driving-wheel gear. As an citation, whether you have 20 teeth in your ring gear and 10 teeth in the pinion gear, your axle ratio will be 2.0:1: 20/10.
2. Measure or find your tire diameter in inches. You can measure this or secure it from your tire manufacturer by specifying your make and model. As an example, use 24 inches.
3. Calculate the speedometer gear. Use the formula: SG = (20.2 x axle ratio)/TD where TD is the tire diameter. Using the above examples, the speedometer gear ratio is 1.68: 20.2 x 2.0/24.
4. Determine the speedometer gears by matching the speedometer gear teeth necessary to arrive the speedometer gear ratio. For instance, if you choose 25 teeth in your top gear, calculate the number of teeth necessary in your bottom gear to accomplish a gear ratio of 1.68 using the formula: Bottom Gear = Top Gear/Gear Ratio. Using the numbers from the example above, your bottom gear will have 15 teeth: 25/1.68. If you know the bottom gear teeth and wish to determine the top gear teeth, use the formula: Top Gear = Gear Ratio x Bottom Gear.
