Join Date: Sep 2016
Location: Northern Virginia
Interesting sideline - tire ageing
OK google ...
Tires are made of long chain polymers of hydrocarbons, mixes of different formulations of organic and synthetic rubber.
These polymers degrade with age, mostly due to heat, heat from rolling down the road, heat from running underinflated, ambient heat. the binding layers between the bead and sidewall, the tread and the body containing the radial fabric, are very susceptible, as are the sidewalls due to their thinness compared to the tread.
exposure to solar UV and atmospheric agents can also contribute to the ageing of rubber.
In one 2012 study, 233 deaths and 300 injuries were directly attributed to tires that failed that were over 6 years old (most close to 10 years).
although the actual life of a given tire is variable due to many other factors, the manufacturers have mostly adopted a 6 year recommendation, 10 for specially formulated high mileage tires, on the basis that a very-few-to-none accidents have tire degradation as a factor for tires under this age limit.
2009 Honda Rebel 250; 2009 Honda Shadow 750 Spirit
"The bravest thing for me to do is admit when I am wrong" - unknown
HRF Answer #1 You should take the MSF Rider Course
HRF Answer #2 You need to clean your carburetor
HRF Answer #3 Sorry we assumed if you didn't say otherwise