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  • Why are vehicle tyres black?

    Discussion in 'The main mechanical design forum' started by Waqas Tariq, Oct 23, 2016.

    1. Waqas Tariq

      Waqas Tariq New Member

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      Why vehicle tyres are always black in colour?
       
      Last edited by a moderator: Oct 26, 2016
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    3. Dana

      Dana Well-Known Member

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      The rubber in tires is compounded with carbon black to help it resist abrasion and UV light, and also gives it its black color.
       
    4. oldbeek

      oldbeek New Member

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      With out seeing it, i would say it is brake bust off of your disc brakes. Does it clean off like dust? If brake dust, you are driving to harshly and braking to much.
       
    5. GarethW

      GarethW Chief Clicker Staff Member

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      He actually wants to know why tyres are black in colour. I have adjusted the title and original post to make this clear.
       
    6. GarethW

      GarethW Chief Clicker Staff Member

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    7. Sanika Patel

      Sanika Patel Member

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      Thank you I also Didn't knew the following things
       
    8. Ganesh Moorthi

      Ganesh Moorthi Member

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      Carbon black additive made by incomplete combustion of heavy petroleum - Primarily an additive and heat dissipating agent added to natural rubbers while manufacturing tires - Reason for black color !
      Check out the below site !
      https://www.polymersolutions.com/blog/carbon-black/
       
    9. pri2347

      pri2347 Member

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      Despite the fact that the regular shade of elastic is a smooth white, the dark shading we see was initially caused by residue. ... Once added to the elastic, carbon blackincreases the quality and toughness of the tires, which is naturally observed as an alluring attribute fortyre makers and vehicle drivers
       
    10. john12

      john12 Well-Known Member EngineeringClicks Expert

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      I'm really surprised that this isn't a more popular thing. Surely the practical benefits can easily be recreated in any colour and I reckon many people would pay a large premium to have their tyres match their bodywork!
       
    11. ramesh

      ramesh Member

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      While there are a few novelty tires with color incorporated into the tread or sidewall of the tire, most tires are black. This is because a key ingredient that is added to the mix of natural and synthetic rubber is carbon black. Carbon black are tiny dust-like particles that act like a bonding agent for the other ingredients in the tire. Carbon black has the added feature of catching ultraviolet rays and absorbing the heat of the sun. This helps protect the tire against ozone and UV damage.

      No other additive has been found to be as effective as carbon black at protecting the rubber and prolonging the life of tires.In the absence of carbon black, ozone and UV rays would attack the molecules and chemical bonds of the rubber, which over time causes the rubber to rot, and weaken.

      After many years of exposure, the light absorption capabilities of carbon black are reduced, particularly in tires on vehicles that are driven infrequently and parked outside for long periods of time. Repeated use of some tire shine products can also dull the carbon black, as well. Chemical discoloration caused by tire shine and cleaners is superficial, and limited to only the very outer layer of rubber that has been treated. Over time, chemically damaged tire rubber will return to black if scrubbed with regular soap and water. Superficial rubber discoloration does not impact the function of the tire, or pose any sort of safety risk. Older, sun and ozone damaged tires however, should be inspected by a tire professional for deep cracks and internal damage to ensure they are road worthy.
       

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