A rocker arm includes an outer arm with an outer follower including a first outer roller and a second outer roller both supported on an outer arm roller shaft, the outer arm roller shaft having a first portion having a first diameter which is supported in the outer arm by a first outer bearing; a second portion having a second diameter which is supported in the outer arm by a second outer bearing; and a third portion having a third diameter such that the third diameter is smaller than the first diameter and the second diameter. An inner arm selectively pivots relative to the outer arm, the inner arm having an inner follower and also having an inner arm aperture through which the outer arm roller shaft extends such that the third portion of the outer arm roller shaft is located within the inner arm aperture.