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The best time to replace your tires is when they are properly installed and the tread is on the flat. Not only will this improve gas mileage, it can save you money by not having to buy replacement tires as often. New tires are easy enough to find and most auto stores carry them. If you have an older car that was manufactured before 2021 then you may need to shop at a specialty tire store. Chains such as Menards or Goodyear will sell tires that are designed for older vehicles.
Once you have determined that you need a new tire, you need to make sure that you are buying the right size. If you are unsure of which size you need then you can always get a graph paper and do the measurements. This way you can be sure that the measurements you are taking are correct. When you have the measurements for the tire repair center will be able to tell you if you are getting a good fit. Sometimes it is better to have a little more cushion in the tire than too little. Not every repair center will know how to measure the tire for you so make sure that you ask when you first start talking to a tire technician.
When it comes to taking care of your tires there really is no excuse. They need to be taken care of so that they last for years and can be used on the open road and in your driveway. Happy Driving!