The BMX street staple of grinding a rail down stairs is explained by none-other than handrail slayer, Kink pro Calvin Kosovich. Learning to grind a rail down stairs will open up your riding to a whole new world of opportunity. From bombing big steep rails to doing combos on little mellow rails… You can gap into them past the kink, you can grind them and gap into the street, you can grind up them.. The possibilities are virtually endless. Shout out to Calvin for manning the filming, editing, and riding for us this week! Cameo from Andrew Castaneda.