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Recent content by davidtire

  1. davidtire

    Premature Ozone Cracking

    Recycled Rubber - The compound has powdered tread peel. Tires are stored outside next to competition. Competition tires are performing well. Ozone - I have had several chemists and consultants view tire pieces. Consistently get, "Yes, that is ozone," when looking at the tires and "No way...
  2. davidtire

    Premature Ozone Cracking

    Tires are stored outside. There is limited distortion. Tires are four deep on a skid. Shore A spec hardness range is 57 to 61.
  3. davidtire

    Premature Ozone Cracking

    Tires are R1 irrigation/rear tractor traction pattern. Cracks are showing up throughout tread and sidewall.
  4. davidtire

    Premature Ozone Cracking

    Making bias tires with a 60 natural 40 sbr N299 tread compound. 4.5 phr 6PPD and Wingstay combined. Two phr blended wax. 1 TMQ 2 sulfur 2 TBBS. Some tires are cracking horribly within 3 months of being mounted and only mounted on a rim, never used, loaded or flexed. Any ideas about what...
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