Graphene in my tyres: Tour of Britain at Whinlatter

I was intrigued by this assertion on the side of a promo bus at Whinlatter. I didn't even know that it referred to tyres. Anyway, here's a link to an explanation https://www.cyclingweekly.com/reviews/tyres/vittoria-corsa-g-plus-tyres The claim is that the addition of a small amount of graphene increases grip and reduces rolling resistance. I can see it with the rolling resistance with what I know about graphene but grip? Anyway, the magazine did a proper scientific test on the rolling resistance. The details are at the bottom of this page https://www.cyclingweekly.com/group-tests/choosing-the-best-road-bike-tyres-20156 but it was done indoors on rollers under controlled conditions. This tyre came second so there seems to be some truth in the claims. But they aren't cheap! I couldn't afford to buy them...