i know that they are race tyres. just conditions last night were dry but they seemed very willing to slide, very easy to get them to spin on climbs, etc, not sure if it could be i have spent a lot of time on a road bike recently?
I guess it could have been that the verderers trail is mainly rock, and had a thin coating of water/mud, maybe just enough to make the ground greasy? It might have been my being a little tired, set off a 9:30pm and had already done 35miles to and from work on the road bike earlier.
Might be worth going back in daylight when more awake and seeing how they are then.