So many people make claims about tire age, but they never link to source data or convincing evidence. Certainly everyone is entitled to their own opinion and every vehicle owner should replace their tires whenever they feel it's warranted...but what's the evidence that supports any claim that a tire is too old at 10 years, 7 years, 6 years, or even 5 years? Is there any convincing evidence that age alone should be the reason for bus or skoolie tire replacement? Let's look at that together.