akexpress 

I don't know how much tandem experience you have but the coordination with your stoker might be problematic. You drop the post and and all of sudden her (his) handlebars drop out from underneath them. Also the lateral torque of the stoker handlebars are loading up the seat post which may hinder function. We ride road, gravel and full suspension mountain tandems and never felt the need for a dropper post, just too many moving parts to coordinate . We have ridden some pretty crazy stuff in Moab just fine and we are getting up there in age so if we can do it a young team can fly through the stuff. Sometimes we clear stuff the singles struggle with as the tandem gaps stuff, obvious a skilled single can leave us in the dust.