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What is the model of the original Michelin tires for the BYD S7?

2 Answers

StDakota

07/25/25 12:51am

The tire model for the BYD S7 is 235/55R18. The first number 235 indicates the tire width is 235MM, 55 represents the aspect ratio of the tire section is 55%, meaning the section height is 55% of the width, and 18 denotes the rim diameter is 18 inches. The middle letters or symbols have special meanings: "X" indicates a high-pressure tire; "R" or "Z" denotes a radial tire; "—" signifies a low-pressure tire. The BYD S7 has a top speed of 180km/h and a fuel consumption of 8.6L per 100km. In addition to the model, the tires also display the following common data: Tire cord material: Represented by Chinese pinyin, such as M for cotton cord, R for rayon cord, N for nylon cord, G for steel cord, ZG for steel radial cord tires. Speed rating: Indicates the maximum speed at which the tire can carry a specified load under defined conditions. Letters A to Z represent certified speed ratings from 4.8km/h to 300km/h. Commonly used speed ratings include: Q: 160km/h; H: 210km/h; V: 240km/h; W: 270km/h; Y: 300km/h. Rim specification: Shows the rim size compatible with the tire for practical use, such as "Standard rim 5.00F".

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StAlice

08/10/25 3:56pm

I've been driving my BYD S7 for over two years, equipped with factory Michelin Primacy 3 ST tires in size 235/55 R18. These tires perform exceptionally well both in city driving and on highways, offering excellent wet weather drainage, stable grip, and high safety. As a family car, it's never slipped when taking kids to school. Maintenance isn't troublesome either - I make it a habit to check tire pressure monthly (maintaining 2.4-2.5 bar) and perform regular tire rotations to extend lifespan. After 50,000 km, I chose this same model again for replacement - durable and quiet, even on long trips without noise. When selecting tires, ensure original specifications to avoid affecting fuel efficiency and suspension, and slightly increase pressure in winter for frost protection. Overall, pairing the S7 with Primacy 3 ST was a wise choice.

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