There are several things to say about this track. First that it is a long single track for mtb, which is normally covered downhill from Vosignolo towards Viano. I obviously did it backwards, in gravel, and I recommend it only to hike-a-bike enthusiasts, because a couple of kilometers of uphill portage await you - paying attention and respecting downhill mountain bikes, I recommend. In the other sense I think it is also feasible in gravel with generous tires, but some passages are difficult and technical, so evaluate your driving skills and still be prepared for a few meters of bike on your shoulder.