How to calculate gear ratio transmission

Gear ratio or gear ratio is a number that indicates the level of the small size of the teeth on the transmission. This gear ratio will determine the acceleration resulting from the combination of teeth - the teeth in the transmission, on each - each level of acceleration. In a motorcycle transmission generally uses a combination of two gear to produce a level of acceleration. While the cars generally use a combination of four or more teeth to produce a level of acceleration. Suppose the speed of gear 1, the change in acceleration of the clutch to the transmission output shaft using a combination of 4 teeth (for cars). Teeth - tooth eye tooth has a different number on each - each tooth. The number of teeth of different eyes - the difference is what will make a difference in the rotation and power transmission.

Now I will just discuss how to calculate gear ratio:
1. combination of 2 teeth
For a combination of two teeth we use the formula:
gear ratio = B: A

2. combination of 4 teeth
For the combination of 4 teeth we use the formula:
gear ratio = (B: A) x (D: C)

3.kombinasi 5 teeth
For a combination of five teeth we use the formula;
gear ratio = (B: A) x (E: C) x (D: E)

Example:
A number of gears is 10, B = 30, C = 20, D = 40

gear ratio = (30: 10) x (40: 20)
= 3 x2
= 6

So gearnya ratio is 6, the point is 6 times round the clutch will generate 1 output turns on the transmission output shaft.