Snow tire

Snow tire means a tire that attains a traction index equal to or greater than 110, compared to the ASTM E1136-93 (Reapproved 2003) (incorporated by reference, see 571.5) Standard Reference Test Tire when using the snow traction test as described in ASTM F1805-00 (incorporated by reference, see 571.5), and that is marked with an Alpine Symbol specified in S5.5 on at least one sidewall.


49 CFR § 571.139

Scoping language

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