I know there's a million "which tire should I buy" threads. I've read them all! But seriously. I've been running a D606 which I like and it has worn well, but I'm thinking about trying the XCMH on the rear. Seems to have quite a following and is about the same price as the 606. My questions are: How well will it do in sloppy Ohio mud/slippery clay? How well does it track on gravel and large railroad ballast? How will wear compare to the 606? Should I expect the same performance on the street? I find the 606 works well on the street except for locking up easily but I'll give it that. I got about 7,000 miles out of my 606 and the XCMH is supposedly a hard compound tire so I will assume I'll get about the same number of miles out of it. I ride about 70% street.