Russia's most advanced tank is the T-14 Armata, which has yet to be put into mass production because of its high cost.
How many tanks does Russia have left on the battlefield? - Quora
Tank
How many usable tanks does Russia have? - Quora
The Tank Is Not Obsolete, and Other Observations About the Future of Combat - War on the Rocks
Ukraine can win - Atlantic Council
Ukraine Can't Win by Tanks Alone - CEPA
How many tanks does the Russian Army have? - Quora
Russia refits old tanks after losing 3,000 in Ukraine - research centre
How many tanks does South Africa have in 2019? - Quora