http://togwt1980.blogspot.co.uk/2015...-and-care.html
Tyre Cleaning and Care

Something that Mr. Goodyear discovered by accident, greatly improves wear resistance, and coincidentally, wet traction, it does not make the rubber harder or softer. The polymerization of butyl rubber changes its wear rate and traction; carbon black is the most important feature in traction.

There are two main degrading agents that attack tyres and rubber trim; UV radiation and ozone. Both of these attack the long hydrocarbon chains of the rubber and, by breaking these bonds, shorten the molecules with resulting loss of elasticity.

How Often Do You Do It?
Every week? Every month? Or so long ago you can’t remember? When was the last time you checked?

Not enough drivers are checking their tyres as often as they should be. After all, your tyres are the only part of the vehicle that make contact with the road and roadworthy tyres are crucial to both your safety and that of fellow road users.