Thats the whole quandrum with tires,do you want one that last or grip and not track rain grooves? I was ok with the dunlops but they seemed to start losing traction with quite a bit of tread left a tap of the rear brake would make the tire skid,ran metzs for a while but had some come apart on me after only 7K also the tire for the rear runs skinny looks like a pizza cutter,now running pirelli night dragons love the tires no complaints other than only getting 7 to 8K from the rear they have a shallow tread depth new .What to do what to do..Tom...