At the beginning of the year I bought some Dugast Typhoon tires for the dry conditions and I have to say I was a bit disappointed...the tires are nice, but I don't think they are tough enough for the dry races around here. Are Challenge tires better? The Grifo has a similar tread pattern. Has anyone ridden the Grifo semi-slick? Anyone have time on the Fango? Did it perform well in the mud?