Ok done went and read every damn thread I could find in the XR section on tires. I have a 2006 R. 80% off road / 20% on road Now my choices are either D606 or MT21's. My question. Of my 80% off road: 50% hardpack/rocks 50% soft deep gravel / sand (like dunes...real sand) Now the D606's have shit for ratings from you guys in the sand. Are the MT21's any better in the sand?