I ' d also recommend you check each tire ' s size . In many places it is illegal to have different sizes tires on the same axle . Also it ' s hell on your differential . I find it odd the dealer would not put two of the same in the front and two of the same in the rear . Personally I ' d get them swapped so there are matching pairs on each axle if the tires need to run in a certain direction this will require removing the tire from the rim and mounting it the other way around . Even if they ' re the same size , they ' re different brands and or models , so different treads and characteristics , they will possibly also wear unevenly . Plus you could end up with the car behaving very differently in left corners versus right corners in certain conditions .