Ratio I, Calculating

Ratio i, calculating

Transmission ratio

Transmission ratio = No. of teeth driven : No. of teeth drive gear

Ratios Formula

IG = gear ratio ZG2 : ZG1
IA = axle ratio ZA2 : ZA1
IOV = overall ratio IG x IA

Example:

5th gear Final drive

Drive gear ZG1 = 37 ZA1 = 9
Driven gear ZG2 = 31 ZA2 = 35

Calculations:

IG = 31 : 37 = 0.838
IA = 35 : 9 = 3.889
IOV = (31 : 37) x (35 : 9) = 0.838 x 3.889 = 3.259