KartingForum.co.uk Gearing Calculator - BETA
Engine Speed (RPM)
Front Sprocket Teeth
MPH
Rear Sprocket Teeth
KPH
Rear Tyre Circumference (cm)
Gear Ratio
Notes: 1) 219 pitch chains: Front sprocket teeth (12) + rear sprocket teeth (89) + 10 = 111. Round it up = 112 Link Chain.
2) Rear Tyre sizes: 84.5cm circumference is the 11" standard UK rear tyre size for most if not all classes.