Start with the decision that changes the outcome
The clearest signs you need new tires are worn tread, cracking, bulges, repeated puncture issues, worsening wet traction, and noise or vibration tied to tire condition.
The best decision comes from observing the condition directly instead of waiting for a dramatic failure. Tires usually give smaller warnings first.
How to narrow the field quickly
Look at tread depth, shoulder wear, sidewall condition, vibration changes, and wet-road confidence together. That creates a better replacement call than any single sign by itself.
Best next move
If the warning signs are already visible, go straight to the correct size results page and compare live replacement options.