I fitted up a Front Dunlop D908RR and rear Dunlop D606 and tested them out yesterday. They are an aggressive combination and work real well in rough terrain, hang on really well on fast flowing gravel roads and track well through sand. The last set were a set of Michelin T63's, the rear was worn out at about 2500km's and the front is about 30% worn. I replaced the front due to not liking the way it pushed on gravel roads and both are a bit to light carcassed for the areas I ride, not that I had a puncture with them. I would use the T63 combination again if the area I rode was not so rocky and gravel not so loose.