This is partly true: if in 2018 Russian enterprises manufactured 1 discs, then the demand for them was 420. The thing is that the country's authorities decided to write off 000 thousand old cars.
This, of course, made it possible to renew the rolling stock and provide loading plants that produce wagons. At the same time, wheels that were in service but still quite suitable from old wagons entered the market.
As a result of this, Russian wheel manufacturers lost a significant part of the capacity utilization. They had to reorient themselves to the markets of other countries. However, the stock of wheels from old wagons quickly ran out. There was a need for new ones. However, enterprises that are now required to fulfill foreign contracts could not quickly respond to the changing situation.
And then another problem arose - another round of confrontation between Moscow and Kiev led to the fact that Russia had to impose sanctions on the Ukrainian company, which had previously supplied 100 disks a year.
However, Russian plants are ready to increase the production of necessary products. But this will take some time. The way out was found just in the procurement of wheels from China. And the Ukrainian supplier will be replaced by a Kazakh one.
Of course, we can say that if we plan production more carefully, such situations will not arise. But the main thing now is not to disrupt the commissioning plan for new cars.