Michelin Pilot Sport 4S (PS4S) tyres has been duly selected for BMW’s X3 M and X4 M competition vehicles – in particular, the Michelin PS4S 255/40ZR21 102Y front and 265/40ZR21 105Y rear ultra-high-performance tyres featuring Michelin’s multi-compound tread patterns and an aramid-reinforced casing design. To signify that they are homologated BMW fitments, the 21-inch summer tyres are to be star-marked along the rim.
The multi-compound rubber treads – for fine-tuned performance on the track- were originally intended for endurance race tyres. In this case, the outer shoulder provides exceptional grip and wear resistance during cornering, intermediate ribs are optimised for steering and handling, and the inner shoulder is designed to break through water and provide grip on wet roads.
Michelin was tasked to concentrate on dry performance, high grip levels, good track endurance and good balance on wet surfaces, while maintaining the BMW M signature sporting feel at the wheel. Keeping the tread pattern and the compounds, Michelin’s PS4S has been designed for a unique balance between grip, comfort, safety and driving enjoyment that meets BMW M’s exacting standards and makes it suitable for everyday road use. The driver of the BMW X3 M and X4 M equipped with Michelin PS4S tyres can enjoy maximum safety and long life of the tyres, even in extreme conditions of use.
French manufacturer Michelin has designed tyres for many of BMW M’s previous models, a result of almost three years of co-development. So far, around 800 prototype tyres and 1,400 pre-production tyres were produced and tested at the Nurburgring in Germany, and Miramas and Ladoux test tracks in France to ensure the performance characteristics demanded by BMW M’s engineers.