You can purchase studs separately. Replace both studs if you bend or damage one in a crash. You should change your every 3 years, or after a bad crash. Order your studs on this website. Pull your old studs out using two jam nuts (not the locking nots the clamps come with) put the handlebar in the clamps for leverage. use the jam nuts to remove the studs. Install the new studs using the same jam nuts and apply blue loctite to the threads. Torque the studs to 30 ftlb.