My Thorn Nomad has some similarities to some older mountain bikes, 26 inch wheels, can take 57mm wide tires with fenders (no fenders in the photo, I could not fit them in the S&S case). The manufacturer strongly recommends flat bars but i wanted drop bars for strong headwinds.
But it really was built for heavy duty touring, long chainstays, etc. Frame is specific to Rohloff hub, does not have a derailleur hanger.
Thorn has recently updated this model. Mine is the Mk II model and has a frame that can be fit with a 100mm suspension fork, but the Mk III does not. And mine was available with an S&S option, the Mk III version does not offer that. The Mk III model also can be fitted with a derailleur hanger if you want one instead of Rohloff.
Post 19 above shows a photo of the same bike in these photos but with a suspension fork when I was using it for mountain biking while car camping in North Dakota.