Russian Missile Forces to Field New Heavy Missile 'Sermat' by 2020

Russia’s Strategic Missile Force will deploy a new heavy intercontinental ballistic missile no later than 2020.
The new silo-based Sarmat ICBM will replace the world’s most powerful nuclear missile, the twenty-five-year-old R-36M2 (SS-18 Satan).
Sarmat is expected to feature advanced countermeasures to enable it to penetrate missile defenses including a complex command and control system and a high degree of maneuverability, he said.
The new system is just one of a number that will totally replace Soviet-era missiles by 2021.
By 2018, Russian nuclear forces will be limited to 1,550 warheads and 700 total deployed strategic nuclear delivery systems including long-range missiles and bombers as part of the New START treaty signed with the United States in 2011.
ria.ru