What does 909010 mean for motorcycles?

[LeBlakely]

Motorcycle 909010 indicates that the length, width, and height of the motorcycle are 90mm, 90mm, and 10mm respectively. Specific meaning of 909010: 90 represents the tire width, measured from the sidewalls of the inflated tire, which is 90 millimeters. 90: represents the aspect ratio of the tire, which is the ratio of the tire height to width, at 90%. A higher ratio means the tire is rounder, while a lower ratio indicates a flatter tire. 10 represents the tire diameter of 10 inches. Method for measuring tires: Measurement point A is located at the center plane of the tire, measuring the distance at the rear of the tire; rotate point A 180 degrees to measurement point B at the front of the tire, with the height located at the center plane of the tire, measuring distance B at the front of the tire. A-B is the measured toe-in.