In order to achieve optimal driving characteristics Continental recommends that the same tires are fitted on all wheel positions of your vehicle. In other words tires of the same brand, tread pattern tire size, load index and speed symbol should be fitted all round. Especially important is that the tire size load, index and speed symbol are in accordance with the vehicle manufacturer’s specification for all wheel positions. In many countries, this is a legal requirement. Driving your vehicle with a non-recommended mix of tire sizes, constructions, and speed ratings can be dangerous and illegal. Follow the vehicle manufacturer’s recommendations and/or seek the advice from a trained tire specialist if you consider upgrading your tires with different sizes, constructions, load ratings or speed ratings.