Survey of tires and wheelstire specification codes

The survey of tires and wheels for summer and winter is contained in the Technical Information bulletins (Tl), Group 4.

When replacing summer tires the tire specification number must be observed. The specification codes NO, N1, and N2 distinguish summer tires specially approved by Porsche from other versions of the same tire type and tire size. The approved tires are also contained in the relevant Tl.

NO, N1 and N2 tires, even of the same make, must not be used simultaneously on one and the same vehicle.

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