A stem assembly for a bicycle that includes a handlebar and a fork having a steerer. The fork is coupled to a wheel and is rotatable about a steering axis to turn the wheel. The stem assembly includes a stem that has a steerer aperture configured to receive the steerer and a handlebar receiving portion configured to receive the handlebar. A wedge is at least partially disposed within the steerer aperture and partially surrounds the steerer aperture. The wedge includes a tapered surface that defines an angle between the steering axis and the stem.