Its not yet clear wither you can take ur own car or bike for Bhutan tour which will be open from 23rd September..waiting for update from Tourism Council Of Bhutan..will update you
Mountain biking in Bhutan covers 5 districts in western Bhutan which are Paro, Haa, Thimphu, Punakha, Wangdue Phodrang including Gangtey and Phobjikha valley. The route passes through mountains, valleys and some beautiful passes which are covered with prayer flags. Visit Now :-https://wanderon.in/blogs/mountain-biking-in-bhutan