I've decided on going with either the stock Dunlop D739 or D739 A/T rear and switching to D756 front tire (looking for more sticky up front, XR650R). Terrain here (PA, WV, OH) is all over the place, hardpack/rocky, rutted, rooty, slick clay (and rain don't stop me). 100 percent off-road. I can't really tell the difference between the D739 and D739 A/T tire. Is the A/T essentially the same tire with more puncture resistance? Dunlop website wasn't too clear. I see some people here running it. Any reason to pick one over the other? Also going with Bridgestone ultra heavy duty tubes.