What is the difference between Primacy 4 and Primacy 4St?
2 Answers
Compared with Primacy 4, Michelin Primacy 4St adopts a new tread pattern design and a new rubber compound, improving wet braking performance and rolling resistance for both new and worn tires. Below is an introduction to the tires: Functions of tires: Mainly include dry grip, hydroplaning resistance, providing comfort, reducing driving noise, impact resistance, wet grip, load capacity, handling performance, average wear, and mileage. Tire cross-section structure: It can generally be divided into four parts: tread, shoulder, sidewall, and bead. Each part has its own function. The tread mainly contacts the ground, the shoulder and sidewall provide support, and the bead contacts the wheel rim to provide sealing. Internal composition of tires: The interior of the tire is composed of multiple layers of different materials, including tread pattern, cover layer, steel belt layer, stress-absorbing rubber strip, carcass ply layer, and inner liner.
I drive a sedan and have been using Primacy 4 tires, which feel exceptionally smooth and quiet, with no skidding during rainy-day braking and no fatigue on long drives. After a friend switched to an SUV and installed Primacy 4St tires, we noticed significant differences: Primacy 4 is designed specifically for sedans, focusing on comfort and wet performance, while 4St is tailored for SUVs, featuring a sturdier carcass for higher load capacity and improved body stability during turns, especially when carrying heavy loads or on rough roads. In terms of size, the St variant supports larger wheels, making it suitable for high-ground-clearance vehicles. Fuel consumption is similar, but the St is slightly more expensive, justified by its durability and safety. If you drive a sedan, Primacy 4 is sufficient; for SUVs or off-road vehicles, 4St is the smarter choice.
