Calculating Transmission Ratio I

Example:

I = ZG₂ : ZG₁¹

i_G = gear ratio = ZG₂ : ZG₁ = 29 : 36 = 0.806

i_A = axle ratio = ZA₂ : ZA₁ = 68 : 26 = 2.615

i_total = total ratio = i_G x i_A = 0.806 x 2.615 = 2.108

• ¹ Z₁ = number of teeth on the drive gear, Z₂ = number of teeth on the driven gear