OK a parts list.
26 inch MTB frame made by Giant, there's a long winded story to that so won't put you to sleep with it.
29er wheels, fits up to 38c tires in the frame but 35c gives ideal clearance.
Cyclocross fork.
FSA Compact road crank rest of the drive train XT- XTR.
I Beam seat and post, very light and more comfy that people think I've done century's no prob's.
XT brakes.
Total weight ready to ride 7.3kg or 16.1 lbs seems pretty good with disc brakes to me.