It looks like a good choice for XTR going off road, i saw that they come as 140/17 on rear tyre so i wonder are they any good? All good off road tyres doesn't even come in 17 inches so this looks promising.
So far i tried some tourances which are great for road usage but terrible on terrain exept gravel, mitas e 09 is cheap and good copy of michelin t 63 and they work on terrain but with weight of xtr isn't happiest solution.

Pirelli bought out Metezler..and it is basically the same as MT16

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2008 XTR Mods : DNA Stage 3 Airbox, PC111, Carbon Cans Ovals, Steve Ruth built XTR734cc Big Bore with - High Desert Dyno (HDD)/ Cuervo Racing Gas Flowed / Ported Head fitted with +1mm Valves & uprated Springs, HDD 5050 Camshaft, HDD +3mm Throttle Body, CP 105.5mm 11:1 Piston, Custom Mapping, Piasini ECU, Renthal 613-01, Barkbusters VPS, Pivot Pegz, Touratech Bashplate, Foam Grips, Kev's O2 Sensor Mod, Kev's Extra Coolant Cooler, Wilbers Progressive Fork Springs and Rear Shock