What is the difference between 3st and 4st tires?

[EzraAnn]

Here are the differences between 3st and 4st: 1. The full name of Michelin 4st is PRIMACY4 (Primacy 4), which is a high-end comfort pattern. It is suitable for car owners who prioritize safety and enjoy quiet driving. It provides consumers with quietness, comfort, and consistent safety from new to old. 2. Michelin 3st is a comfort pattern from Michelin, with the full name Primacy3ST (Primacy), which is a high-end comfort pattern. Its characteristics are comfortable ride and low tire noise during driving. Here is some relevant information: The Michelin Group is a global leader in tire technology, established over a century ago in Clermont-Ferrand, France. Throughout its long history, since inventing the first removable bicycle tire in 1889 and the first inflatable tire for cars in 1895, the Michelin Group has continuously innovated in tire technology and manufacturing. In addition to tires, the Michelin Group also produces rims, steel wires, mobility assistance systems (such as the PAX system), travel services (such as ViaMichelin, GPS), maps, and travel guides, with its map and guide publishing arm being a leader in the field.