In this blog post, ApsleyTyres lists 5 signs that it's time for new tyres.
1. Bald Tyres
The first sign is having bald tyres. Driving on bald tyres is much riskier in snowy and icy conditions. You need to tread on your tyres to stop, turn, and drive safely.
2. Sidewalls Cracks
Damaged tyres are dangerous to drive on. As well, poor alignment can cause sidewall damage, which can lead to an accident or blowout.
3. The vehicle shakes a lot
The tyres of your vehicle likely need to be replaced if they shake frequently, even on well-paved roads. A badly aligned vehicle might have shaken tyres, but a poorly treaded vehicle could also have problems.
4. Your tread wear warranty has been met
Usually, tyres are guaranteed for a particular number of years. When the warranty period for your tyres ends, you might want to look over them and purchase new ones.
5. Having a spare tyre on your car
Spare tyres can come in handy in case a flat tyre needs to be changed quickly. Using a spare tyre for a long time is not advised. As a temporary solution, you will need to purchase tyres. You shouldn't use spare tyres as permanent mountings because they are less durable, provide less traction, and are less capable of cornering.