Gear Ratio Calculation

WARNING: This page is about a different car, the 2017 Volkswagen GTI, 2016 Volkswagen GTI, 2015 Volkswagen Golf, and 2015 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.

Example:

	6th Gear	Final Drive
Drive gear	ZG₁ = 45	ZA₁ = 21
Driven gear	ZG₂ = 28	ZA₂ = 70

i = Z₂ : Z₁ (Z₁ = number of teeth on the drive gear, Z₂ = number of teeth on the driven gear)

i_G = gear ratio = ZG₂ : ZG₁ = 28 : 45 = 0.622

i_A = axle ratio = ZA₂ : ZA₁ = 70 : 21 = 3.333

i_total = total ratio = i_G x i_A = 0.622 x 3.333 = 2.073