Michelin Pilot Sport 4S vs Falken Azenis RS820: The all-new 2025 Falken Azenis RS820 has arrived—and it’s gunning straight for the top of the ultra-ultra high performance (UUHP) segment. Standing in its way? The Michelin Pilot Sport 4S, a reigning benchmark since 2017. Can the newcomer unseat the king, or will the 4S hold its …