I currently have 5 bikes on the go from my XT to a BM XR all of them are run on Dunlops Sport Smarts F/R or the odd Qaulifier in the UK and Road Smarts on the rear for Europe the one thing I can assure you the Sport Smart 2 is absolutely pants compared to the original even Dunlop know it!!!

Currently run the XT with a Qaulifier on the front and RoadSmart on the back