Tire size information - Inch / American system

Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models

Updated: 

The common format for these numbers is A.AA/BBC-DD (e.g., 4.00/90H-18). Explanation:

  • A.AA: This number refers to the width of the tire in inches (see tire width conversions table below).
  • BB: This number refers to the height (aka: profile or aspect ratio) of the tire as a percentage of the width of the tire.
  • C: This letter refers to the speed rating (see speed ratings table below).
  • DD: This number refers to the diameter of the rim in inches.