When you get a new set of wheels for your car, you should consider whether your existing tires are still usable or suitable for the new wheels. We recommend you to get new tires because it can help you avoid some potential issues.
This depends on the size of the wheel.
If your new wheels are of the same size as your old ones, you can put your existing tires on them. If not, then you have to get a new set of tires.
We suggest you to buy a new set of tires for your new wheels, because there will be less chance of potential issues, such as balancing the wheel / tire combination properly or ensuring that the tire is the correct size for your new wheels.
There’s an important parameter of the tire that you should consider when your get new tires: the aspect ratio, which is equal to the section height(Y) divided by the section width(X). For example, if your new wheels are larger than your previous ones, the tires that you will get for these wheels should be in lower aspect ratio. But what should be pay attention to is that lower aspect ratio may bring worse buffering performance and less driving comfort.