[///M Power-Belgium]

Originally Posted by M5Rick

So wheel rim ventilation that's channelled onto wheels/tyres.
There was similar system on Mercedes before which was allowed after Ferrari queried it but was banned from RBR in a 2012 race.
https://www.autosport.com/f1/news/fi...90128/5290128/

Here is the cooling system that the Merc had in the DAS times.