Because of the way tires are manufactured, the tread pattern is designed to be used in matching sets on vehicles. This is why it's noticeably better to get a set of four tires instead of just two. Your car or truck will drive much smoother and handle much better with a matching set of four matching tires; especially in wet or snowy weather. If you have an AWD (All Wheel Drive) or 4X4, you definitely want to replace tires in sets of four because the drive mechanism of four wheel drive vehicles need to have matching sizes and tread patterns to maximize traction in poor road and weather conditions.
It's always better to buy a set of tires then 2.. hope this information help's you cristian..
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