Tire age is a critical but often overlooked factor in protection—rubber degrades over time, even with minimal use. Most manufacturers recommend replacing tires every 6-10 years, regardless of tread depth. To check age, find the DOT code on the tire sidewall: the last four digits indicate the week and year of manufacture (e.g., “3523” = 35th week of 2023). Old tires become brittle, prone to cracks, dry rot, and sudden blowouts—especially in extreme temperatures. Even if stored properly, rubber loses flexibility over time, compromising safety. If your tires are over 6 years old, inspect them quarterly for signs of aging (cracks in sidewalls, discoloration) and replace if necessary. Don’t rely solely on tread depth—age-related damage is invisible but dangerous. Prioritizing tire age alongside wear ensures you’re driving on safe, reliable tires.