My first impression was that of the new set of Dunlops that I jus put on my 125. I was right:they stick like glue at the rear on the wet hard pack n the loose stuff. no wher after 30 min.on my z400 even after blasting up n dwn. a gravel rd.8 miles.They don't pack up either.The frnts.will push a little if realy pushed hard at a pro level on the track but for ametur.racing n all trail riding terrain they will be great,even on rocky stuff due to the scuff bars on sidewalls. the XC is a 6-ply but is not heavy at all n is balanced well.Landed a 4ft. high jump at aprox. 40 n instant track to change lines.Im very happy with the STI/XC 22-7-10 N THE 20-11-9 tires that motosport sold me at a great price n shipped right to my door at no shipping cost.AN THE MOTIONPRO TIRE IRONS r a must if u want to install yourself.