Tires bloom because antiozonant pushes its way to the outer edge of the rubber casing with time. As the element comes into contact with oxygen, it leaves a brown residue on the surface of the tire. Antiozonant is organic and helps tires last longer as it slows deterioration due to oxidation. https://www.google.com/url?sa=t&sou...QtwJ6BAgXEAE&usg=AOvVaw3PS78c1rVthX3jc5NMFhfV
