December 4, 2025
96A mechanic’s perspective: Run-flat tyres have stiffer sidewalls than standard tyres. Lift the car and gently press the sidewall – if it feels unusually rigid, it’s likely a run-flat. Michelin’s run-flats often have a distinct tread pattern and the "ZP" logo. Always cross-check with the manufacturer’s specs, as incorrect identification can affect safety.
82The marking for Michelin run-flat tires is ZP. If the tire is labeled with ZP, it indicates that the tire is a run-flat. For Pirelli brand tires, the identification mark for run-flat tires is RF; for Continental tires, the mark is SSR; and for Bridgestone tires, the mark is RFT.
Run-flat tires from different brands are similar in composition, mainly consisting of the outer tire, standard inner tube, spare inner tube, wheel rim, gas generator, pressure sensor, and control unit.
The primary difference between run-flat tires and regular tires is that run-flat tires have a smaller aspect ratio, making the vehicle's overall center of gravity less prone to change during use. In contrast, regular tires, with their larger aspect ratio, are more likely to lose balance during severe bumps or collisions, increasing the risk of a blowout. Additionally, controlling the tire after a blowout becomes significantly more challenging for the driver.
12Michelin run-flat tyres can be identified by specific markings and features. Look for the "ZP" (Zero Pressure) or "RFT" (Run-Flat Technology) designation on the tyre sidewall, indicating run-flat capability. Michelin's run-flat tyres also have reinforced sidewalls to support the vehicle's weight when deflated.
To confirm, check the tyre's model name – Michelin’s run-flat range includes the Pilot Sport 4 ZP, Primacy 3 ZP, and Latitude Tour HP ZP. These are designed to allow continued driving for a limited distance (usually up to 50 miles at reduced speeds) after a puncture.
For further verification, consult the vehicle’s manual or the tyre placard (usually inside the driver’s door), which may specify run-flat compatibility. If purchasing used tyres, inspect for wear or damage to the sidewalls, as run-flat tyres require careful handling.
