The most convenient time to purchase new tires is when you change tires from summer tires to winter tiresor vice versa. As you are anyway changing tires, you may as well install a new set of tires. You should always replace the tires when the tread depth gets below 0,16 inches or 4 mm.
It is always better to replace all four tires at the same time to ensure that the car will have equal grip in all four tires. If you only change two tires, the car can be difficult to maneuver. This is also the reason why the tires should be rotated between front and rear axles every season. This should make the wear more even among the four tires, so that you can purchase four new tires when they need to be replaced. The tire shops usually have a large selection of tires, as many people tend to buy new tires when they are getting them changed.
When you use two sets of tires, summer tires and winter tires, you don’t need to buy tires that often as they are only being used half the year and the other part of the year they are just being stored. Considering this, make sure that you buy a good quality tire that will last for a long time as well as one that will make your journeys safe as you drive on wintry roads.
The selection of tires is nowadays very large, with numerous brands making different types of tires. It can be a bit difficult to choose the best tire for you and your vehicle. It is good to read the tire reviews and tire tests to ensure that you get a tire with low rolling resistance as that impacts your vehicle’s fuel efficiency. If your tires have a high rolling resistance you will have to use more fuel, which can be costly. Check also tire noise, as that can impact your driving comfort.