The buyer needs to know the appropriate tire size for the car, as well as the age of the tires being considered for purchase, according to the AARP. It is also useful to take driving habits and local weather into consideration, recommends Edmunds.com.
The appropriate tire size is typically found on a label inside the driver side door of the car, and also in the owner's manual for the vehicle, says the AARP. It is never advisable to rely on the size of the old tires on the car, because they could be incorrect for that vehicle.
Tires age and deteriorate with time, whether they are in use or not, advises the AARP. Websites like Craigslist and eBay frequently have pictures of the merchandise for sale that are useful for seeing the tires' age codes. Tires have an age code on the side that reveal when they were made. This code begins with the letters "DOT" and ends in four numbers. The first two digits are the week number, while the second two digits are the year. Buying tires that are already several years old is not recommended.
It is also useful to know the typical price for the standard tires on the vehicle. The Internet is a good source for getting tires at a discount, recommends CNN. However, it is necessary to know what the tires usually go for to understand if sellers on Craigslist or eBay are offering good deals.