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tread depth

  1. Wheels & Tires - Chevy Volt
    Hi all, At 30k mi., the tread depth on our OEM Goodyear Assurance tires is 5-6mm. The treat depth on the same tire new is 10mm. With the anticipated El Nino rains here in CA, I'm wondering whether I should get a new pair of tires for the front wheels. I already have a new oem tire on a spare...