I remember back when there was an SCCA sanctioned, Maine Forest WINTER rally, and the land owners (7 Islands) FORBID the use of metal in the tires driven on their property (therefore negating the use of the full-on/'real'
Michelin studded rally tires of the day), the Hakkas were the absolute 'go-to' tire for the competitors (and most of the workers/officials were on them as well).