I started a thread about tires a few days ago. I have the original tires on my 2013 Triton and had read a few threads about tires breaking down even though the tread is in good shape. someone said there is a date manufactured on the tires so I've looked at both sides several times and cannot find the DOT number anywhere. I know they're at least 5 years old but would like to know the age. Any ideas?