The park tool handlebar holder is designed to prevent the handlebars and front wheel from rotating when a bike is mounted in a park tool repair stand updated to fit handlebars up to 32mm and oversized top tubes up to 50mm the hbh 2 works on almost any road or mountain bike park tool handlebar holder features the handlebar holder is designed to prevent the handlebar and front wheel from rotating when a bike is mounted in a park tool repair stand fits handlebars with a diameter