Technical Specifications Of Wheel Rims

Specification Designation
my country's wheel rim specification codes are largely aligned with international standards. Nominal width and nominal diameter are expressed in inches. The connecting symbol in the middle (either * or -) indicates whether the rim is a one-piece (integral) unit.
Wheel rims in my country are manufactured in accordance with the national standard GB/T 3487-2005.
For example: "4.50E*16" denotes a one-piece rim with a nominal width of 4.5 inches and a flange code of E.
"6.5-20" denotes a multi-piece, flat-base wide rim with a nominal width of 6.5 inches and a nominal diameter of 20 inches.
Rim specifications are crucial during vehicle operation, as they determine which tires can be fitted to the vehicle.
Tire/Rim Specifications: International standard tire codes express the section height and aspect ratio (as a percentage) in millimeters, followed by the tire type code, rim diameter (in inches), load index (code for permissible load capacity), and speed rating code. For example, in "175/70R 14 77H": 175 indicates a tire width of 175 mm; 70 indicates an aspect ratio of 70% (meaning the section height is 70% of the width); 14 indicates a rim diameter of 14 inches; 77 is the load index; and H indicates the speed rating.