This frame will have many duties-700x28 to 700x43 and everything inbetween. Originally the customer was asking for 2" tire room but I had to draw the line at 40-43. Try to make one bike that does 4-5things and you will wind up with some not so good compromises.
That is not the case with this one . With the right tires this bike will be great on the dirt-with the right wheels and tires it will be pretty good on the road-not a 16 lb. race bike but still pretty quick and very stable on those long Colorado downhills.