I must also agree that these tyres, when they pick up debris, will not immediately shed it. I drive gravel roads often and as soon as I hit pavement it's click-click-click until I stop and pull the rocks out. I found on newly wet pavement that they let go but except for the softest of tyres, all tyres will do this. For instance, my silicone tyres from Michelin grip like villains in ANYTHING but are way too expensive and have an incredibly short mileage life.
Speaking of picking things up, look at what I found sticking out of lug. It didn't piece the tyre, but was embedded to the point that I thought it was a metal flake and not a nail.
