All my vintage three mountain bikes are full rigid ones , one with its original full rigid steel fork, the two other withs a rigid carbon fork
Merida with its original steel fork

The Kona Kilaeua with its carbon fork

The Scapin Dedacciai with its carbon fork

During the rides I had with other mountain bikers,I rode much faster (especially with the Kona or the Scapin) than others who had full suspended bikes or those with a front suspension. My tires are 26*2.2 continentals on the Scapin and the Kona except on the Merida where I have 26*1.8 hutchinsons. My next mtb is going to have a front suspension and a steel frame.