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  • -
    Fuel Efficiency
    Fuel Efficiency / Rolling Resistance: -

    How much fuel the tyre uses as it rolls. Graded A to E, where A is the most efficient and E the least.

  • -
    Wet Grip
    Wet Grip / Braking Performance: -

    How well the tyre stops in the wet. Graded A to E, where A is the shortest stopping distance. Each grade is worth roughly 3 metres, about a car length.

  • -dB
    External Noise
    Noise Emission / Exterior Noise: - dB

    How loud the tyre is from outside the car, measured in decibels. Graded A to C, where A is the quietest.

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Michelin e. Primacy ST S1 255/45R21 106W XL

  • Tick Icon Car
    Car tyre:

    Designed for cars, rather than vans, 4x4s or commercial vehicles.

  • Tick Icon Reinforced (XL)
    Extra Load or Reinforced tyres:

    A stronger sidewall lets this tyre carry more weight than a standard tyre of the same size. Marked XL on the sidewall.

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Product description & features

The Michelin e.Primacy ST S1 is designed as a low rolling resistance summer tyre. Using a special tread compound and an even more advanced sub-tread compound, the e.Primacy ST S1 minimises the energy lost to rolling resistance. Michelin has also designed the e.Primacy ST S1 with a unique tread layer that helps minimise wear. The layer is designed to evenly distribute all the forces that occur across the tread when braking, accelerating, and cornering.

Michelin has also designed the e.Primacy range to have, on average, 27% lower rolling resistance compared to other tyres. Grades on the EU label for the e.Primacy ST S1 in fuel efficiency, wet grip, and external noise will vary depending on the tyre size, so please check sizes accordingly. The e.Primacy ST S1 can be found on Tyres.co.uk.

Highlights

  • Low rolling resistance summer tyre
  • Special tread and sub-tread compounds
  • Tread layer for even wear